- Type of paper
: Paper in book
Title: Concrete structure and protection of steel reinforcement
- Authors:
- Ukrainczyk, Velimir (51054)
- Bjegović, Dubravka (3896)
- Editors
- Holm, Jens
- Geiker, Mette
Publisher: American concrete institute
ISBN: 91-76422
Year: 1992
Pages: from 21 to 32
Number of references: 15
Language: engleski
Summary: The greatest threat to the durabilityof reinforced
concretestructures is the reinforcement corrosion. The paper presents
theimportance of the concrete protective cover and the conditionscusing the
reinforcement corrosion under the action of chloridesand carbon oxide.
processes of absorption, diffusion and flow,i.e. of transport of media
through concrete depend on the poresystem and amount of water in the pores.
Physical laws describungthe penetration of aggressive agents into concrete
can serve asbasis for engeneering calculations of reinforcement cover.
Forengineering purposes, in a calculating the durability, fourtypical tasks
can be solved.
Keywords: absorption, corrosion, cover, diffusion, durability, porosity, reinforced concrete, structural design
- Type of paper
: Paper in book
Title: Post-fatigue properties of steel fiber reinforced concrete
- Authors:
- Ukrainczyk, Velimir (51054)
- Rak, Zvonko (89703)
- Editors
- Swamy, R.N.
Publisher: E&FN Spon
ISBN: 0 41918130X
Year: 1992
Pages: from 257 to 265
Number of references: 5
Language: engleski
Summary: For the sake of choosing mix designs for investigation of
railwaysleepers, the fiber reinforced concretes were tested for
fatiguestress and impact resistance. Experimentally have beeninvestigated
mechanical properties of steel fiber reinforcedprisms before and after
cyclic loadings. Fibers were dosaged inthe theree quantities, and the
maximum grain sizes ofaggregate were 4, 8 and 16 mm.After two months curing
the prismswere subjected to 10-E4 cyclic flexural loadings. The changes
ofultra sonic pulse velocities in specimens and residual bendingstrength
and working diagrams have been tested. The results showgood correlations of
fatigue resistance with fiber contents.
Keywords: fiber reinforced concrete, steel fibers, fatigue tests, impact tests, residual strength, dynamic modula
- Type of paper
: Paper in journal
Title: Substance penetration as concrete durability parameter
- Authors:
- Ukrainczyk, Velimir (51054)
- Bjegović, Dubravka (3896)
Journal: Ceste i mostovi
Number: 5
ISSN: 0411-6380
Volume: 37
Year: 1991
Pages: from 129 to 136
Number of references: 8
Language: hrvatski
Summary: The procedures of measurement of concrete durability
parametershave been investigated intensivly, both by laboratory and in
situmethods. The purpose of this project was to establishcorrelations
between laboratory and in situ measured results.The model to forecast the
service life of reinforced concretestructure has been developed on the
basis of basic physical lawsgoverning the penetration of aggressive matter
into the concrete.
Keywords: Concrete, durability, engineering structure, load, structural materials, mathematical model, laboratory, test, in situ
- Type of paper
: Paper in journal
Title: Determination of concrete quality in a structure by
combination of destructive and non-destructive methods
- Authors:
- Mikulić, Dunja (89455)
- Pauše, Željko (35214)
- Ukrainczyk, Velimir (51054)
Journal: Materials and structures
Number: 146
ISSN: 0025-4532
Volume: 25
Year: 1992
Pages: from 65 to 69
Number of references: 10
Language: engleski
Summary: The paper describes a mathematical model for determination
ofparameters for concrete compressive strength based on indirectmeasuring
of values (ultrasonic puls velocity, rebound hammerindex, etc.) which are
easier to measure and which are, in a way(linear regression), related to
the concrete compressivestrength. A relationship has been determined
between randomsample values for direct and indirect measuring
whichyieldsequally good statistical estimations of mathematical
expectationsand dispersion. The paper also presents the results of
laboratoryconcrete testing as basis for quality determination of concretein
situ by means of a destructive and non-destructive methodcombination, in
order to estimate the compliance of concrete in astructure.
Keywords: concrete, compresive strength, destructive and non-destructive methods, statistical model, reliability
- Type of paper
: Paper in journal
Title: Computer Aided Mix Design of Concrete
- Authors:
- Mikulić, Dunja (89455)
- Ukrainczyk, Velimir (51054)
- Pauše, Željko (35214)
- Trupčević, Dragutin (65921)
Journal: Građevinar
Number: 10
Volume: 45
Year: 1993
Pages: from 557 to 566
Number of references: 19
Language: hrvatski
Summary: The theoretical model for the design production and
qualitycontrol of concrete that has been developed in the scope of
theCAMDOC - Zagreb informatic system is presented. Formulas forwater
content calculation (permanent correction), as well as foranticipating
compressive strengths in order to establishcorrelations and relative
relationship with the initial concretecomposition, constitute a significant
tool in the design andredesign procedures. Relevant data from two
construction siteswere used to test results obtained in this research.
Keywords: concrete, mix design, production, concrete composition, concrete quality, water content, compressive strength
- Type of paper
: Paper in journal
Title: Concrete Structures Quality Insurance at Dubrava
Hydroelectric Plant
- Authors:
- Ukrainczyk, Velimir (51054)
- Hranilović, Marko
- Blagus, Franjo
- Filip, Marjan
Journal: Građevinar
ISSN: 0350-2465
Volume: 44
Year: 1992
Pages: from 89 to 97
Number of references: 3
Language: hrvatski
Summary: The paper presents the teoretical basis of the quality
insurancesystem and its application durin construction of
Dubravahydroelectric power plant. Owing to the transition of
Coderequirements preceding the beginning of construction, allpreliminary
activities for quality insurance system were omitted.This was tried to be
compensated through increased activitiesduring the phases of production of
materials and execution ofworks.
Keywords: concrete, quality control, quality insurance, hydroelectric power plant, standards, production of materials, construction
- Type of paper
: Paper in journal
Title: Some properties of microreinforced concrete
- Authors:
- Ukrainczyk, Velimir (51054)
- Šušterčič, Jakob
Journal: Naše građevinarstvo
Number: 7
ISSN: 0350-2619
Volume: 45
Year: 1991
Pages: from 461 to 468
Number of references: 34
Language: hrvatski
Summary: The general knowledge and the results of own research
regardingfiber reinforced concrete are presented. Most importantparameters
are aspect ratio, quantity of fibers and thetechnology applied. Although
fiber mixing in fresh concretecauses certain difficulties,it came out in
some cases that thereare technological and economic advatages. More
importantapplications are possible for special purposes where someimproved
properties of concrete are required, such as dynamicloads, erosion etc.
Keywords: concrete, fibers, technology, resistance to erosion, aspect ratio
- Type of paper
: Paper in journal
Title: Fiber reinforced concrete - the relation between quality
and quantity of fibers and concrete strength
- Authors:
- Ukrainczyk, Velimir (51054)
- Šušterčič, Jakob
- Mavar, Kruno
- Mali, Edvard
- Rebić, Miljenko
Journal: Građevinar
Number: 2
Volume: 34
Year: 1989
Pages: from 67 to 70
Language: njemački
Summary: For two types of fibers, steel and polypropilene, the
optimumdosage for normal and lightweight concrete were investigated.
Theprocedures and criteria for evaluations were working diagrams,bending
strength, toughness and tensile strenghts. It isconcluded, that for certain
bending strength ofconcrete, thedefinit optimal quantity of fibers exist.
Keywords: fiber reinforced concrete, steel fibers, polypropilene fibers, optimal mix design
- Type of paper
: Paper in journal
Title: The bearing capacity of fiber reinforced shotcrete lining
of tunnel
- Authors:
- Ukrainczyk, Velimir (51054)
- Uljarević, Mato
- Šušterčič, Jakob
- Zajc, Andrej
Journal: Zement und Beton
Number: 2
Volume: 35
Year: 1991
Pages: from 20 to 21
Number of references: 2
Language: njemački
Summary: The posibility of application of fiber reinforced
shotcretelining in tunnels is investigated in laboratory and in situ.
Keywords: fiber reinforced concrete, steel fibers, polypropilene fibers, shotcrete, tunnel lining
- Type of paper
: Paper in journal
Title: Bearing capacity analysis of fiber reinforced lightweight
concrete
- Authors:
- Rak, Zvonko (89703)
- Ukrainczyk, Velimir (51054)
Journal: Građevinar
Number: 8
ISSN: 0350-2465
Volume: 44
Year: 1992
Pages: from 511 to 520
Number of references: 22
Language: hrvatski
Summary: Results of laboratory and theoretical investigations of a
newkind of fiber reinforced lihgtweight concrete based onpolypropilene
fibers and polystirene bids are presented. Based onthese investigations as
well as by other researchers, astructural analysis method for the bearing
elements loaded tobending is proposed. Very good insulation properties,
mechanicalcharacteristics and cost-effectiveness of this special kind
ofconcrete call for further investigations of possibleapplications.
Keywords: lightweight concrete, PP fibers, bearing capacity analysis, calculation model
- Type of paper
: Paper in proceedings
Title: Design strategy for durable reinforced concrete structures
- Authors:
- Ukrainczyk, Velimir (51054)
- Bjegović, Dubravka (3896)
- Editors
- Radic, Jure
Proceedings title: Zbornik radova 1. znanstvenog kolokvija "Mostovi"
Language: hrvatski
Place: Zagreb
Year: 1991
Pages: from 179 to 285
Meeting: Prvi znanstveni kolokvij "Mostovi"
Held: from 06/20/91 to 06/22/91
Summary: Durability aspects could be treated in different phases
ofservice life of RC structure. The most expensive is in the repairphase.
In this paper several strategies on service life designfor structures
damaged by reinforcement cover are substancial.Our results of water and Cl
ions penetrability measurements arepresented in diagrams.
Keywords: Concrete, matter penetration, durability, repair, repair strategies
- Type of paper
: Paper in proceedings
Title: Gas permeability measurements as the durability parameter
of concrete
- Authors:
- Bjegović, Dubravka (3896)
- Čalogović, Vladimir (89104)
- Žagar, Goran
Proceedings title: Zbornik radova Radnog sabora Graditelji u obnovi Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 203 to 209
Meeting: Radni sabor Graditelji u obnovi Hrvatske
Held: from 06/25/92 to 06/27/92
Summary: Two methods of gas permeability testing are described as
one ofthe most important penetration parameters of concrete cover,which
effects the service life conditioned by reinforcementcorrosion.
Measurements were executed on the same specimens todefine relationship
between laboratori and in situ methods.
Keywords: concrete, porosity, mesurements, permeability, laboratory testing, in situ testing
- Type of paper
: Paper in proceedings
Title: Gas permeability measurements of porous materials
- Authors:
- Bjegović, Dubravka (3896)
- Ukrainczyk, Velimir (51054)
- Čalogović, Vladimir (89104)
- Žagar, Goran
- Editors
- Wittmann, Folker
Proceedings title: Materials Science and Restoration, Vol 3
Language: engleski
Place: Esslingen, Njemačka
Year: 1992
ISBN/ISSN: 3-8169-0953-1
Pages: from 1570 to 1580
Meeting: Materials Science and Restoration
Held: from 12/15/92 to 12/18/92
Summary: The methods for laboratory testing of gas permeability
arestandardized, and the corresponding criteria for concrete alreadyexist.
Several in situ air permeability methods, which could beused during
construction for quality control purposes, orassessment of permeability of
porous materials in service, areunder development. In this paper the
results of testing theconcrete by laboratory and in situ method are
compared.Measurements were conducted on the same specimens to define
therelationship between two different methods.
Keywords: porous building materials, permeability, measurements, laboratory measurements, in situ measurements
- Type of paper
: Paper in proceedings
Title: Development and application of fiber reinforced shotcrete
in tunneling
- Authors:
- Jašarević, Ibrahim
- Ukrainczyk, Velimir (51054)
- Editors
- Simović, Veselin
Proceedings title: Graditeljstvo u strategiji obnove i razvoja Republike Hrvatske
Language: hrvatski
Place: Crikvenica, Hrvatska
Year: 1993
ISBN/ISSN: 953-96085-0-3
Pages: from 259 to 276
Meeting: Graditeljstvo u strategiji obnove i razvoja Republike Hrvatske
Held: from 09/30/93 to 10/02/93
Summary: Theoretical assumptions and technological solution for
theprimary support lining in tunnel is presented. According to theproposed
solution, the bearing structure is formed of rock,reinforced by rigid
prestressed anchors and made to actcompositely with shotcrete layer fiber
reinforced bypolypropylene fibers. Results of laboratory tests and in
situtests on completed structures are presented.
Keywords: fiber reinforced shotcrete, tunnel, new technological solution, prestressed anchors, laboratory tests, in situ tests, polypropilene fibers
- Type of paper
: Paper in proceedings
Title: Quality control and acceptance criteria for concrete and
its ingredients (Yugoslav experience)
- Authors:
- Mikulić, Dunja (89455)
- Pauše, Željko (35214)
- Ukrainczyk, Velimir (51054)
- Skenderović, Ana
Proceedings title: Quality control of concrete structures
Language: engleski
Place: London, Velika Britanija
Year: 1991
ISBN/ISSN: 0419 15800 6(
Pages: from 481 to 490
Meeting: Quality control of concrete structures
Held: from 06/12/91 to 06/14/91
Summary: Control tests of concrete and its ingredients are conducted
ondifferent levels during the production, acceptance andmaintenance. The
existing Yugoslav criteria for concrete qualitydetermination are shown in
the form of algorithm, and theirtheoretical foundation is also pointed out
in the paper. Programsfor computer processing of the testing results of
concrete,cement and aggregate properties have been carried out. Somerecent
research aspects show significant influence of timedependence in series of
tests on quality criteria.
Keywords: Quality, control, concrete, cement, aggregate, statistics, criteria, OC-lines
- Type of paper
: Paper in proceedings
Title: Influence of aggregate and matrix toughness ratio on
compressive strength of concrete
- Authors:
- Mavar, Kruno
- Ukrainczyk, Velimir (51054)
- Rak, Zvonko (89703)
- Krolo, Joško
Proceedings title: Teorijska i eksperimentalna istraživanja
Language: hrvatski
Place: Beograd, Jugoslavija
Year: 1991
Pages: from 57 to 60
Meeting: IX kongres SDGKJ
Held: from 04/09/91 to 04/12/91
Summary: The new model of concrete code prescribes a unified ratio
forcompressive strengths on standard cylinder and cube
specimens.Experimental investigations on Bekhme site (Iraq) obtained
aconversion coefficient which significantly different fromprescribed ones.
In order to explain such results we made certainnumerical model
investigations of toughness ratio of aggregateand matrix respectively.
Keywords: concrete, strength, conversion faktor, toughness of ingredients
- Type of paper
: Paper in proceedings
Title: A Part of the Durability Design of New Maslenica Bridge
- Authors:
- Bjegović, Dubravka (3896)
- Krstić, Vedrana
- Bjegović, Dubravka (3896)
- Editors
- Bjegović, Dubravka (3896)
- Krstić, Vedrana
- Ukrainczyk, Velimir (51054)
Proceedings title: 2.radni sabor Graditelji u obnovi Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1993
ISBN/ISSN: 953-6175-02-9
Pages: from 389 to 394
Meeting: Radni sabor Graditelji u obnovi Hrvatske
Held: from 10/13/93 to 10/15/93
Summary: Many structures have to be repaired and many new have to be
constructed in the castal marine environment. Hence, there is a special
interest of experst to perform the concrete engineering structures in
accordance with high quality standards. In this paper a method for
durability design of reinforced concrete structures in marine environment
is described. The method is based on space and time distribution of
chloride ions in concrete. The practical execution is conducted by means of
computer program CHLODIF. It was applied in the design of new Maslenica
bridge.
Keywords: durability, concrete structure, bridges, marine environment, service life, computer program
- Type of paper
: Paper in proceedings
Title: New approach in the ultimate life calculation for cracked
concrete
- Authors:
- Krstić, Vedrana
- Bjegović, Dubravka (3896)
- Bjegović, Dubravka (3896)
- Mikulić, Dunja (89455)
- Krstić, Vedrana
- Radic, Jure
- Editors
- Radic, Jure
- Radic, Jure
- Radic, Jure
Proceedings title: 3. radni sabor Graditelji u obnovi Hrvatske
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-6175-04-5
Pages: from 437 to 446
Meeting: Radni sabor Graditelji u obnovi Hrvatske
Held: from 10/13/94 to 10/15/94
Summary: In this paper a new method for design of reinforced
concrete structure exposed to aggressive environment is proposed. This
method consideres real conditions of concrete section cracking under the
usual loads and results in appropriate time table for maintenence of the
structure.
Keywords: durability, service life, marine environment, design, maintenence, computer program
- Type of paper
: Paper in proceedings
Title: Repair of RC Structures Damaged by Reinforcemnent
Corrosion
- Authors:
- Bjegović, Dubravka (3896)
- Ukrainczyk, Velimir (51054)
- Editors
- Simović, Veselin
Proceedings title: Sabor hrvatskih graditelja
Language: hrvatski
Place: Zagreb
Year: 1993
ISBN/ISSN: 953-96085-0-3
Pages: from 215 to 221
Meeting: Sabor hrvatskih graditelja
Held: from 09/30/93 to 10/02/93
Summary: Guidelines for the repair of RC structures damaged by
reinforcement corrosion are presented. The systematic approach presented
focuses on a number of separate activities: anamneses, diagnosis,
repair-work design, realization, handover, monitoring and maintenance.
Criteria for the final classification of damage caused by reinforcement
corrosion are presented.
Keywords: repair, RC structures, corrosion, reinforcing bars, anamnesis, diagnosis, monitoring
- Type of paper
: Paper in proceedings
Title: Diagnosis of damage caused by reinforcement corrosion
applying multyparameter evaluation procedure
- Authors:
- Ukrainczyk, Velimir (51054)
- Bjegović, Dubravka (3896)
- Ukrainczyk, Boris
- Žnidarič, Jaš
Proceedings title: Prvi hrvatski kongres o cestama 1995
Language: hrvatski
Place: Zagreb
Year: 1995
Meeting: Prvi hratski kongres o cestama 1995
Held: from 10/23/95 to 10/25/55
Summary: The greatest threath to the durability of reinforced
concrete road structures is reinforcement corrosion. Depending on the
environmental conditions and concrete quality the damages caused by
reinforcement corrosion have been observed already after 15 to 25 years,
which means, much earlier than wanted service life - about 100 years. Many
methods for measurements of parameters relevant to durability and also to
diagnosis of building materials quality have been developed. However, the
data obtained do not give always the same degree of damage. In this paper
is presented two stage method procedure for evaluation, applying neuro
shell computer program.
Keywords: durability, reinforcement corrosion, road structures, measurements, diagnosis, neuro shell
- Type of paper
: Paper in proceedings
Title: Laboratory testing of plastic concrete for diafragma
- Authors:
- Ukrainczyk, Velimir (51054)
- Čalogović, Vladimir (89104)
- Banjad, Ivana
- Mikulić, Dunja (89455)
Proceedings title: Sanacija brane Peruča
Language: hrvatski
Place: Zagreb
Year: 1995
Pages: from 345 to 363
Meeting: Međunarodna konferencija Sanacija brane Peruča
Held: from 09/20/95 to 09/23/95
Summary: The results of preliminary and control tests for plastic
concrete for diafragma are presented. The tests were performed for
compressive and flexural states of stresses, erodibility and water
permeability. The working diagram for comperssive stresses is aproximated
by non-linear regresion analysis. It was shown that modulus depends on
stress and strain level, and it could be calculated if the strength is
known. In calculation of flexural strength, due to the plastic behaviour,
the non-linearity shuold be taken into account.
Keywords: plastic concrete, diafragma, strengths, modulus of elasticity, erodibility, water permeability
- Type of paper
: Paper in proceedings
Title: New approach in the ultimate life calculation for cracked
concrete
- Authors:
- Bjegović, Dubravka (3896)
- Radic, Jure
- Krstić, Vedrana
- Mikulić, Dunja (89455)
- Čandrlić, Vinko
- Editors
- IABSE,
Proceedings title: Extending the lifespan of structures
Language: engleski
Place: Zuerich, Switzerland
Year: 1995
ISBN/ISSN: 3-85748-087-4
Pages: from 1259 to 1264
Meeting: IABSE Symposium San Francisco 1995
Held: from 08/20/95 to 08/22/95
Summary: The paper describes a new proposal for the design of
reinforced concrete structures in an aggredssive environment. The prcedure
takes into account the real conditions of concrete section cracking under
dead and live loads and special durable loads.
Keywords: durability, concrete structures, life span, cracks, aggressive media, calculation model
- Type of paper
: Paper in proceedings
Title: Appearance oc crackes in concrete tunnel coats and their
prevention
- Authors:
- Ukrainczyk, Velimir (51054)
- Banjad, Ivana
- Ukrainczyk, Boris
Proceedings title: Prvi hrvatski kongres o cestama
Language: hrvatski
Place: Zagreb
Year: 1995
Meeting: Prvi hratski kongres o cestama 1995
Held: from 10/23/95 to 10/25/95
Summary: Problems of begining, spreading and prevention of cracks in
concrete tunnel linings in this paper are described. Causes of appearance
are investigated all over the world as well as in our country. The review
of types of cracks and their division is given. As typical causes of
crackibg are described by heat flow, tension and pressure stresses,
hydration heat or others. In graphic supplements are given relations and
correlations of single parameters on appearance of cracks beginnings and
spreading. The means for reducing risk of cracks appearances and trends for
future research are presented.
Keywords: tunnel lining, cracks, cuses
- Type of paper
: Paper in proceedings
Title: Anticorrosion systems in the maintenance, repair and
restoration of structures in reinforced concrete
- Authors:
- Bjegović, Dubravka (3896)
- Gelner, Larry
- Rosignoli, Dario
- Editors
- NACE,
Proceedings title: Corrosion in natural and industrial environments: problems and solutions
Language: engleski
Place: Monza, Italy
Year: 1995
Pages: from 269 to 280
Meeting: Corrosion in natural and industrial environments: problems and solutions
Held: from 05/23/95 to 05/25/95
Summary: Based on the consolidated experience of "vapor corrosion
inhibitors", applied to the protection of ferrous and non-ferrous metals,
the formulae of "migrating corrosion inhibitors" (MCI) have been developed.
The diffusion of MCI moleculas through the concretes porosity has been
demonstrated and measured utilizing radioactive isotope and the sensitive
electrodes techniques.
Keywords: reinforcement corrosion, migrating corrosion inhibitors, testing
- Type of paper
: Paper in proceedings
Title: Diffusion of the MCI 2020 and 2000 corrosion inhibitors
into concrete
- Authors:
- Bjegović, Dubravka (3896)
- Šipoš, Laszlo
- Ukrainczyk, Velimir (51054)
- Mikšić, Boris
- Editors
- Swamy, R.N.
Proceedings title: Corrosion and corrosion protection of steel in concrete
Language: engleski
Place: Sheffield, Great britain
Year: 1994
ISBN/ISSN: 1 85075 723 2
Pages: from 865 to 877
Meeting: Corrosion and corrosion protection of steel in concrete
Held: from 07/24/94 to 07/28/94
Summary: In order to determine the diffusion coefficient of
corrosion inhibitors, three types of concrete with different gas
permeability coefficients have been prepared and tested. Acell has been
constructed to allow monitoring of the diffusion process of these materials
into concrete and the diffusion coe3fficients have been determined. A new
method convenient for monitoring the process of volatile amine diffusion
into concrete has been developed.
Keywords: durability, corrosion inhibitor, diffusion, diffusion cell, electrochemical method, amine sensitive electrode
- Type of paper
: Paper in proceedings
Title: Design of concrete durability
- Authors:
- Ukrainczyk, Velimir (51054)
- Editors
- Zajc, Andrej
Proceedings title: Sanacije betonskih objektov
Language: slovenski
Place: Ljubljana, Slovenija
Year: 1995
ISBN/ISSN: 961-90107-1-X
Pages: from 15 to 22
Meeting: Slovenski kolokvij o betonih 1995
Held: from 05/25/95
Summary: Buildings are exposed to ageing as all other technical
systems. This fact has been recognized only recently by civil engineers.
For technically correct solution of durability problems, better knowlidge
of properties of building materials is necessary. During the last decades
several recommendations and standards are published in developed countries,
but many others are still under investigation. On the basis of physical
laws new models for service life design are proposed.
Keywords: durability, service life, design models, testing of properties
- Type of paper
: Paper in proceedings
Title: Tunnel lining with fibre reinforced concrete
- Authors:
- Ukrainczyk, Velimir (51054)
- Editors
- Zajc, Andrej
Proceedings title: Mikroarmirane malte in betoni
Language: slovenski
Place: Ljubljana, Slovenija
Year: 1994
ISBN/ISSN: 961-90107-0-1
Pages: from 15 to 19
Meeting: Slovenski kolokvij o betonih 1994
Held: from 05/26/94
Summary: The reasons for wide-spreading use of fibre reinforced
shotcrete to build up tunnel lining and a lining of other underground
constructions as well to stabilize a rock slope are given in a paper. The
results of measuring fibre reinforced shotcrete in situ and in the
laboratory are given.
Keywords: fibre reinforced concrete, shotcrerte, tunnel lining, testing
- Type of paper
: Prototype
Title: Underground linings and slope support by the use of
polypropylene fibers reinforced shotcrete and rigide anchors
- Authors:
- Ukrainczyk, Velimir (51054)
- Rak, Zvonko (89703)
- Jašarević, Ibrahim
Date of application: 01/23/95
Registration number of application: P930932A
Countries in which it is protected: Hrvatska
Language: hrvatski
- Type of paper
: Ph.D.
Title: Design of concrete structures in chemically aggressive
environment
Faculty: Građevinski fakultet Sveučilište u Zagrebu
Date of defense: 06/18/91
Language: hrvatski
Number of pages: 292
Summary: On the basis of own investigations and laboratory tests, as
wellas on the basis of data from other authors, the correlationbetween lab
methods of measurements of parameters relevant fordurability of concrete
and methods applicable in situ has beenestablished. The engineering model
for service life prediction isproposed for RC structures in chemically
aggressive environments.
Keywords: reinforced concrete structures, durability design, chemically aggressive environment, service life prediction, testing the relevant durability parameters
- Type of paper
: Ph.D.
Title: Theoretical model of concrete quality assurance
Faculty: Građevinski fakultet Sveučilište u Zagrebu
Date of defense: 05/14/93
Language: hrvatski
Number of pages: 168
Summary: The original computor model for concrete mix design and
redesignis developed. The analyses of test results of concrete and
itsingredients has shown the neccesity of permanent control offollowing
parameters: cement water requirement, sieve analyses,fineness modulus, air
quantity, temperature and concreteconsistency and concrete strength. The
time dependence of abovementioned parameters has been found, which in turn
has to befollowed by autoregression model for quality control. Thecomputor
program enables simple and quick control for any changein constituents
parameters, equipment or environment.
Keywords: concrete, mix design, computer program, quality control
- Type of paper
: M.A.
Title: Experimental investigation of adhesion between
polypropylene fibers and concrete matrix
Author: LONČAR ANGELA
Date of defense: 05/08/95
Language: hrvatski
Number of pages: 315
Summary: In the introduction, systematically is given the state of
the art in the field of fiber reinforced concretes. Experimentally is
investigated the bond between fibers and matrix for the new type of
composite, which is obtained by introducing thick polypropylene fibers into
the concrete matrix than it was used before. By means of known theoretical
models, the data obtained by pull-out tests were analysed.
Keywords: fiber reinforced concrete, polypropylene fibers, adhesion, calculation model,
- Type of paper
: Mentorship
Title: Experimental investigation of adhesion of polypropylene
fibers and concrete matrix
Mentor: UKRAINCZYK VELIMIR
Date of defense: 05/08/95
Number of pages: 315
Author: Lončar dipl.ing. Angela
Degree level: M.A.
- Type of paper
: Mentorship
Title: Theoretical model for concrete quality assurance
Mentor: UKRAINCZYK VELIMIR
Date of defense: 05/14/93
Number of pages: 168
Author: Mikulić Dunja
Degree level: Ph.D.
- Type of paper
: Mentorship
Title: Design of concrete structures in chemically aggressive
environment
Mentor: UKRAINCZYK VELIMIR
Date of defense: 06/18/91
Number of pages: 292
Author: Bjegović doc.dr. Dubravka
Degree level: Ph.D.
- Type of paper
: Mentorship
Title: Toughness of EPS concrete
Mentor: UKRAINCZYK VELIMIR
Date of defense: 11/27/91
Number of pages: 87
Author: Lutman dipl.ing Marko
Degree level: M.A.
- Type of paper
: Mentorship
Title: Analysis of mechanical resistance to erosion and abrasion
by water flow
Mentor: UKRAINCZYK VELIMIR
Date of defense: 02/14/91
Number of pages: 131
Author: Kryžanovski dipl.ing. Andrej
Degree level: M.A.
- Type of paper
: Computer program
Title: CLODIF - computor program for ion diffusion into concrete
- Authors:
- Bjegović, Dubravka (3896)
- Mikulić, Dunja (89455)
- Krstić, Vedrana
Odering party: Građevinski fakultet, Odjel za materijale
Institution depot: Građevinski fakultet, Odjel za materijale
HW platform: PC/AT/386/486
Operating system: 286/DOS
Programming language: TURBOPASCAL 5.5
Year: 1993
Summary: Computor program CLODIF enables calculation of time and
spacedistribution of clor ions i concrete and forcasting of servicelife of
RC structures.
Keywords: concrete, durability, service life prediction, clor ions,
- Type of paper
: Computer program
Title: TEMHID-heat flow calculation in mass concrete
- Authors:
- Mikulić, Dunja (89455)
- Ukrainczyk, Velimir (51054)
- Stanić, Mirjana
Odering party: Građevinski fakultet, Odjel za materijale
Institution depot: Građevinski fakultet, Odjel za materijale
HW platform: PC /AT/386/486
Operating system: 286/DOS
Programming language: FORTRAN
Year: 1991
Summary: Heat flow analysis in mass concrete according to the
Schmidtmethod of final differences. Could be conducted for differentlift
sizes, different quantities of cement, different heat ofhydration,
different concreting schedules.
Keywords: mass concrete, temperature flow
- Type of paper
: Computer program
Title: OC-operating characteristics for evalutaion of criteria of
concrete
- Authors:
- Mikulić, Dunja (89455)
- Trupčević, Dragutin (65921)
Odering party: Građevinski fakultet, Odjel za materijale
Institution depot: Građevinski fakultet, Odjel za materijale
HW platform: PC/AT/386/486
Operating system: 286/DOS
Programming language: TURBOPASCAL 5.5
Year: 1991
Summary: The development of the statistical desision theory made
itpossible to compare each of the criteria for determination ofquality
control of concrete. Basic theoretical method forcomparing criteria is a
method of operating characteristics.
Keywords: operatin characteristic, quality control
- Type of paper
: Computer program
Title: CAMDOC-computer aided mix design of concrete
- Authors:
- Mikulić, Dunja (89455)
- Trupčević, Dragutin (65921)
- Ukrainczyk, Velimir (51054)
- Pauše, Željko (35214)
- Mraković, Ranka
Odering party: za vlastite potrebe projektiranja
Institution depot: Građevinski fakultet, Odjel za materijale
HW platform: PC/AT/386/486
Operating system: 286/DOS
Programming language: CLIPPER 87, TURBOPASCAL 5.5
Year: 1993
Summary: CAMDOC model is operated on the personal computer, and
written inCLIPPER 87, and MODUL 2 in TURBO PASCAL 5.5. CAMDOC containes
30knowledge and decision bases helpšing the concrete mix design. Itgives
the possibility of simple and quick reaction to allvariable changeable
values in concrete proportion, equipment andconcrete production.
Keywords: concrete mix design, CAD,
- Type of paper
: Survey/Study
Title: Special properties relevat for durability of concrete
- Authors:
- Ukrainczyk, Velimir (51054)
- Bjegović, Dubravka (3896)
- Čalogović, Vladimir (89104)
- Mikulić, Dunja (89455)
- Balabanić, Gojko (88930)
Ordering party: Javno poduzeće Hrvatske ceste
Institution depot: Javno poduzeće Hrvatske ceste
Year: 1991
Number of pages: 153
Language: hrvatski
Summary: The state of the art in the field of reinforced
concretestructures patology is presented. Own research into te posibilityof
modeling the service life prediction has shown the necessityof measuring
the relevant properties of concrete. The newapparatus for measuring the
permeability of concrete has beendeveloped and corresponding properties
were measured. theexisting measuring methods for durability parametars
aredescribed, and the criteria for evaluation are proposed.
Keywords: reinforced concrete structures, durability, service life, prediction models, permeability, mesurements, evaluation
- Type of paper
: Survey/Study
Title: Appearance and spreading of cracks in tunnels, and their
preventive
- Authors:
- Ukrainczyk, Velimir (51054)
- Banjad, Ivana
- Ukrainczyk, Boris
Ordering party: American concrete institute
Institution depot: Javno poduzeće Hrvatske ceste
Year: 1995
Language: hrvatski
Summary: In several tunnel linings have cracks appeared, which were
both regular and iregular shape (e.g. tunnel Učka and tunnel Marjan).
Detailed investigation of causes has shown that two types of cracks are
most frequent, length cracks in the arch, and vertical cracks in the tunnel
walls. Besides that cracks, periodically appear horizontal cracks at 2 or 4
meters from the road level. The causes of all three types of cracks were
analised and explained. The cracks in tunnel linings could not be completly
avoided, but their frequency and width can be minimized, in order to avoid
subsequent harmfull influences.
Keywords: cracks, tunnel linings, causes
- Type of paper
: Survey/Study
Title: Remidiation of tunnel in hydro electric power plant Rama
- Authors:
- Ukrainczyk, Velimir (51054)
Ordering party: E&FN Spon
Institution depot: E&FN Spon
Year: 1995
Number of pages: 51
Language: hrvatski
Summary: The report containes the program for investigation works
with description of testing methods and criteria for evaluation of degree
of damages for concrete lining. The general solutions for remidy works are
given and the urgent repairs, to be done during the investigation works are
described. The second part of the report containes the results of visual
survey, categorization of damages and the volum of necessary remidiation
works.
Keywords: hydrotechnical tunnel, remidiation works, testing, criteria
- Type of paper
: Survey/Study
Title: Tunnel lining with fiber reiforced shotcrete
- Authors:
- Ukrainczyk, Velimir (51054)
- Jašarević, Ibrahim
- Lončar, Angela (189311)
Ordering party: American concrete institute
Institution depot: Javno poduzeće Hrvatske ceste
Year: 1994
Number of pages: 83
Language: hrvatski
Summary: Fiber reinforced shotcrete is accepted as the advanced
system for tunnel lining and slope support in technically developed
countries. Steel fibers have almost completly replaced steel wire meshes in
shotcrete for tunnel linings. In this research program is proved the
posibility of replacement of steel fibers with polypropylene fibers. In
relation to steel wire meshes the new solution gives following advantages:
-less work, -less material expences, -better homogenity of concrete cross
section, -less cracking risk, -more safety in working conditions, -less
total expences.
Keywords: primary tunnel lining, shotcrete, fiber reinforcement, steel, polypropylene
- Type of paper
: Survey/Study
Title: Investigation of MCI inhibitors' diffusion through
concrete
- Authors:
- Ukrainczyk, Velimir (51054)
- Bjegović, Dubravka (3896)
- Šipoš, Laszlo
Ordering party: CORTEC corporation
Institution depot: CORTEC corporation
Year: 1993
Number of pages: 23
Language: engleski
Summary: On three concrete types the diffusion on reinforcement
corrosion inhibitors were tested. The quality of concretes was defined by
gas permeability. The new method has been developed to measure the amine
concentration, suitable to follow the diffusion of volatile amines through
concrete.
Keywords: reinforcement corrosion, inhibitors, amine, testing
- Type of paper
: Survey/Study
Title: Evaluation of safety and remaining service life of bridges
in exploatation
- Authors:
- Ukrainczyk, Velimir (51054)
- Bjegović, Dubravka (3896)
- Žnidarič, Jaš
Ordering party: Građevinski fakultet, Odjel za materijale
Institution depot: Građevinski fakultet, Odjel za materijale
Year: 1995
Number of pages: 102
Language: slovenski
Summary: The methods of measurements, criteria and models for
calculation of service life of reinforced concrete structures is reviewed.
Keywords: bridges, reinforced concrete, durability, measurements, criteria, calculation models for durability
- Type of paper
: Technical report
Title: Guide to Repair Strategies for Concrete Structures Damaged
by Reinforcement Corrosion
- Authors:
- Andrade, Carmen
- Browne, Roger
- Gjorv, Odd
- Isecke, Bernd
- Page, Chris
- Polder, Robert
- Rostam, Steen
- Schiessl, Peter
- Tomosawa, Fuminori
- Treadaway, Ken
- Ukrainczyk, Velimir (51054)
Ordering party: RILEM - Reunion international des laboratoires d Essais et de Recherches sur les Materiaux et les Constructions
Institution depot: RILEM - Reunion international des laboratoires d Essais et de Recherches sur les Materiaux et les Constructions
Year: 1993
Number of pages: 74
Language: engleski
Summary: Corrosion of steel in concrete is one of the major problems
withrespect to the durability of reinforced concrete structures.RILEM
founded the technical committee TC 124 SRC which preparedthe relevant
recommendation for designers, construction engineersand repair engineers
dealing with concrete structures.
Keywords: concrete structures, steel corrosion, assessment, strategy, repair, protection, repassivation, electrochemical methods
- Type of paper
: Technical report
Title: Investigation into the possibilities of production
dolomitic lime
- Authors:
- Ukrainczyk, Velimir (51054)
- Halle, Radovan
Ordering party: "Kamen", Sirač
Institution depot: "Kamen", Sirač
Year: 1995
Number of pages: 42
Language: hrvatski
Summary: Besides its advatages, dolomitic lime has also some
disadvatages, and the main problem is slow hydration of MgO. In this
research program, the conditions of production process, which gives
harmless quantities of MgO has been sucessfully investigated, and the
procedure is proposed to the manufacturer.
Keywords: dolomitic lime, slow hydration
- Type of paper
: Technical report
Title: Watertight diafragm in Peruča dam
- Authors:
- Ukrainczyk, Velimir (51054)
- Banjad, Ivana
- Čalogović, Vladimir (89104)
- Žugelj, Vlasta
Ordering party: Građevinski fakultet, Odjel za materijale
Institution depot: Građevinski fakultet, Odjel za materijale
Year: 1995
Number of pages: 87
Language: hrvatski
Summary: The preliminary and control testin of plastic concrete for
diafragm of Peruča dam are conducted. The characteristic parameters as
compressive strength, E modulus, flexural strength, erodibility and water
permeability have been measured. It was shown, that E modulus depend
strongly on the stress level, and it could be calculated from strength data
and known hyperbolic approximation of working diagram. In calculation of
flexural strength, the shift of neutral axis twords compressive zone should
be taken into account.
Keywords: plastic concrete, hydraulic dam, testing, strength, deformability, erodibility watertightness
- Type of paper
: Project
Title: Materials for repair of reinforced concrete structures
- Authors:
- Ukrainczyk, Velimir (51054)
- Bjegović, Dubravka (3896)
Ordering party: "Herbos", kemijska industrija
Institution depot: "Herbos", kemijska industrija
Year: 1992
Number of pages: 0
Language: hrvatski
Summary: According to the contract No. 150-1-92 the
preliminarylaboratory tests, large scale industrial production and
thenlaboratory control tests were conducted for the sake ofdevelopment of
series of polymer modified cement mortars forrepair of reinforced concrete
structures damaged by corrosion.Five new products for repair is developed.
Keywords: reinforced concrete, corrosion, repair materials, polymer modified portland cement mortars
- Type of paper
: Project
Title: Dry mortars for building and rendering
- Authors:
- Ukrainczyk, Velimir (51054)
- Žugelj, Vlasta
Ordering party: "Kamen", Sirač
Institution depot: "Kamen", Sirač
Year: 1993
Number of pages: 0
Language: hrvatski
Summary: According to the contract 150-1-93 the preliminary
laboratoryresearch into the possibility of industrial production
ofprefabricated masonry cement and dry mortars has been conducted.
Keywords: masonry cement, dry mortars, building, rendering
- Type of paper
: Project
Title: Investigation and repair design for cement factory
- Authors:
- Bjegović, Dubravka (3896)
- Čalogović, Vladimir (89104)
- Žagar, Goran
Ordering party: Tvornica cementa, Koromačno
Institution depot: Tvornica cementa, Koromačno
Year: 1993
Number of pages: 66
Language: hrvatski
Summary: The investigations into the reinforced concrete
structuresdamaged by concrete and reinforcement corrosion has
beenconducted. The general design for repair works is proposed.
Keywords: reinforced concrete structure, concrete corrosion, reinforcement corrosion, repair design, cement factory
- Type of paper
: Project
Title: Diffusion of the MCI 2020 and 2000 corrosion inhibitors
into concrete
- Authors:
- Ukrainczyk, Velimir (51054)
- Bjegović, Dubravka (3896)
- Šipoš, Laszlo
Ordering party: CORTEC corporation
Institution depot: CORTEC corporation
Year: 1993
Number of pages: 29
Language: engleski
Summary: By means esspecially developed cell the diffusivity
ofreinforcement corrosion inhibitor has been measured fordifferent
qualities (porosities) of concrete.
Keywords: corrosion, inhibitor, test cell, diffusivity
- Type of paper
: Project
Title: Special technical requirements for concrete works for
Maslenica bridge
- Authors:
- Ukrainczyk, Velimir (51054)
- Bjegović, Dubravka (3896)
- Mikulić, Dunja (89455)
- Rak, Zvonko (89703)
Ordering party: Javno poduzeće Hrvatske ceste
Institution depot: Javno poduzeće Hrvatske ceste
Year: 1993
Number of pages: 44
Language: hrvatski
Summary: Taking into account special climatic environment at the
locationof new Maslenica bridge, special technical requirements
areprescribed for concretes resistant to marine influences. Theelaborate
contains also the conditions for quality assurancerequirements and concrete
technology design.
Keywords: reinforced concrete bridge, corrosion, marine environment, special conditions, high performance concrete, quality assurance, concrete mix design
