Concrete Repair, Rehabilitation and Retrofitting: 2nd International Conference on Concrete Repair, Rehabilitation and Retrofitting, ICCRRR-2, 24-26 November 2008, Cape Town, South Africa

Table of contents......Page 6
Preface......Page 16
ICCRRR Committees......Page 18
Keynote papers......Page 20
Design for service life: How should it be implemented in future codes......Page 22
Importance of microstructural understanding for durable and sustainable concrete......Page 30
Advanced NDT methods for the assessment of concrete structures......Page 38
Efficiency control of electrochemical repair techniques......Page 50
External strengthening of continuous beams with CFRP......Page 58
Diagnostic analysis and therapy of severely cracked bridges......Page 68
Invited papers......Page 78
Research in the field of repair – Actual approaches and future needs......Page 80
Reflections on future needs in concrete durability research and development......Page 86
Reinforcement corrosion: Research needs......Page 94
Innovative materials and influences of material composition......Page 102
High performance concrete for extreme applications......Page 104
Durability and microstructural development during hydration in ultra-high performance concrete......Page 106
Concrete ability to resist chloride ions using ternary blended cement......Page 108
Sulphate resistance of high volume fly ash cement paste composites......Page 110
Durability of light-weight concrete with expanded clay aggregate......Page 112
On the potential of rubber aggregates obtained by grinding end-of-life tyres to improve the strain capacity of concrete......Page 114
Investigations on the PCC-Microstructure after Mechanical Load......Page 116
Composites in structures – Use of special strength theories based on the form of anisotropy......Page 118
Concrete containers for containment of vitrified high-level radioactive waste: The Belgian approach......Page 120
Performance of different types of Pakistani cements exposed to aggressive environments......Page 122
Durability requirements in self-compacting concrete mix design......Page 124
Chemical attack of SCC: Immersion tests and X-ray CT......Page 126
Study of chloride penetration in self-compacting concrete by simulation of tidal zone......Page 128
Transport of water and gases in crack-free and cracked textile reinforced concrete......Page 130
Application of FRC and FRSC in structural elements of St Rok tunnel......Page 132
Durability of Strain-Hardening Cement Composites (SHCC) – An overview......Page 134
A novel durability design approach for new cementitious materials: Modelling chloride ingress in strain-hardening cement-based composites......Page 136
A two component bacteria-based self-healing concrete......Page 138
Self healing properties with various crack widths under continuous water leakage......Page 140
Using natural wood fibers to self heal concrete......Page 142
The effect of geo-materials on the autogenous healing behavior of cracked concrete......Page 144
Surface protections to prevent Alkali-Aggregate Reactions (AAR) in concrete structures......Page 146
Micro-scale alterations of cementitious surfaces subjected to laser cleaning process and their potential impact on long-term durability......Page 148
Evaluation of anti-fouling strategies on aerated concrete by means of an accelerated algal growth test......Page 150
Corrosion testing of low alloy steel reinforcement......Page 152
Influence of the geometry and reinforcement content of specimens on frost de-icing salt resistance of concrete......Page 154
Service life modelling and prediction of durability......Page 156
Life cycle management of concrete structures Part I: Birth certificate......Page 158
Life cycle management of concrete structures Part II: Monitoring......Page 160
A Spreadsheet Model for Service-Life Predictions......Page 162
Modeling of the influence from environmental actions on the durability of reinforced concrete structures......Page 164
Studies on prediction models for concrete durability......Page 166
Critical chloride content in reinforced concrete – State of the art......Page 168
Use of durability indexes in probabilistic modelling for durability design of RC members......Page 170
A simplified and practical approach regarding design for durability of reinforced concrete structures based on probabilistic modeling of chloride ingress......Page 172
Assessment of the behaviour of concrete in the initiation period of chloride induced corrosion of rebars......Page 174
Corrosion propagation in cracked and uncracked concrete......Page 176
Effect of temperature on transport of chloride ions in concrete......Page 178
Repair of architectural concrete and related modelling of carbonation-induced corrosion......Page 180
Determination of critical moisture content for carbonation of concrete......Page 182
Effect of environmental parameters on concrete carbonation. DURACON collaboration (Mexican results)......Page 184
Improvements in durability design of concrete bridges in Croatia......Page 186
Fire engineering in Croatia......Page 188
Modelling of reinforcement corrosion......Page 190
DFG Research Group 537: Modelling of reinforcement corrosion – An overview of the project......Page 192
DFG Research Group 537: Modelling reinforcement corrosion – Investigations on the mechanism of cracking and spalling......Page 194
DFG Research Group 537: Modelling of reinforcement corrosion – Macrocells and time dependence......Page 196
DFG Research Group 537: Modelling of reinforcement corrosion – Validation of corrosion model......Page 198
DFG Research Group 537: Modelling reinforcement corrosion – Corrosion measurements on cracked reinforced concrete beams......Page 200
DFG Research Group 537: Modelling reinforcement corrosion – Numerical modelling of bond strength of corroded reinforcement......Page 202
DFG Research Group 537: Modelling of reinforcement corrosion – Modelling loss of steel cross sectional area and design for durability......Page 204
DFG Research Group 537: Modelling reinforcement corrosion – Observation and monitoring of self-corrosion processes in chloride contaminated mortar by X-ray tomography......Page 206
Degradation assessment and service life aspects......Page 208
An Austrian experience with identification and assessment of alkali-aggregate reaction in motorways......Page 210
Chloride ion propagation in onshore zone of Recife-PE......Page 212
Investigation of the deteriorations of educational institutes......Page 214
Durability evaluations on the bridge over the Ruwais lagoon at Jeddah......Page 216
Assessment of post-fire reinforced concrete structures. Determination of depth of temperature penetration and associated damage......Page 218
Computer integrated knowledge systems for the assessment and diagnosing distress in concrete structures in Persian Gulf......Page 220
Mechanical behaviour of corroded rebars and influence on the structural response of R/C elements......Page 222
NDE/NDT and measurement techniques......Page 224
Nondestructive testing methods for hardly accessible parts of structures......Page 226
Vibration based assessment of shear connectors in concrete composite bridges......Page 228
New approach to in-situ evaluation of watertightness of reinforced concrete underground structures......Page 230
Experimental evaluation of indirect sonic wave transmission technique in the diagnosis and monitoring of concrete slabs......Page 232
Ultrasonic imaging of post-tensioned concrete elements: New techniques for reliable localization of grouting defects......Page 234
Practical experience of geo-radar technique application in the course of an integrated inspection of historical buildings......Page 236
Wireless monitoring of structures including acoustic emission techniques......Page 238
OSSCAR – Development of an On-Site SCAnneR for automated non-destructive bridge testing......Page 240
Development of a portable LIBS-device for quality assurance in concrete repair......Page 242
High speed chemical analysis of concrete surfaces using the LIBS method within the ILCOM project......Page 244
On the possibility of rapid nondestructive determination of compressive strength of cement materials......Page 246
Locating reinforcing bars in concrete with Electrical Resistance Tomography......Page 248
Electrical resistance tomography imaging of concrete......Page 250
Materials and structural assessments......Page 252
Quality assessment of a 40-years old tunnel......Page 254
Deficiencies in concrete structures "The Sherlock Holmes" factor......Page 256
Contribution to diagnosis of alkali-silica reaction in a bridge structure......Page 258
Condition assessment and repair alternatives for Lucko bridge overpasses of Zagreb......Page 260
Service life extension of existing precast concrete girders......Page 262
Approaches for the assessment of the residual strength of concrete exposed to fire......Page 264
Residual strength of R.C. buildings after a fire: A case study......Page 266
Assessment of fire-damaged concrete structures and the corresponding measures......Page 268
Different methods to investigate and to repair the damages of a post-tensioned deck of a high-way bridge after a fire incident due to a traffic accident......Page 270
Structural behaviour of beams under simultaneous load and steel corrosion......Page 272
BETOSCAN – An instrumented mobile robot system for the diagnosis of reinforced concrete floors......Page 274
Accelerated high water corrosion......Page 276
Condition assessment of prestressed concrete structures with static and dynamic damage indexes......Page 278
Debond Detection in RC Structures using piezoelectric materials......Page 280
Development of a new test method for mineral based composites – Wedge splitting test......Page 282
Evaluation of fibre distribution in concrete using AC impedance technique......Page 284
Simple hydration equation as a method for estimating water-cement ratio in old concrete......Page 286
Selection of an optimal method for humidity elimination in masonry buildings......Page 288
Repair of guard gallery columns, Robben Island Maximum Security Prison......Page 290
Repair methods and techniques......Page 292
Concrete repair: Research and practice – The critical dimension......Page 294
Performance based rehabilitation of reinforced concrete structures......Page 296
Repair of bridge IB42 over the Limpopo river at Stockpoort border post......Page 298
The aging of concrete sewers: Replace or rehabilitate......Page 300
Concrete retrofitment solutions utilized at the Van der Kloof Dam spillway bridge......Page 302
Rehabilitation of major bridges over the spillways of three of South Africa's largest dams......Page 304
Protection of concrete with water repellant agents – What is required to achieve a sufficient penetration depth?......Page 306
Accelerated transport of corrosion inhibitors as complementary methodology for electrochemical chlorides extraction method......Page 308
Crack repair in concrete using biodeposition......Page 310
Cracked concrete repair with epoxy-resin infiltration......Page 312
Concrete repair with ultra ductile micro-mesh reinforced abrasive resistant and impervious mortar......Page 314
Electrochemical treatments of corroded reinforcement in concrete......Page 316
Electrochemical impedance monitoring of carbon fiber as an anode material in cathodic protection......Page 318
CP of the rear reinforcement in RC-structures – Numerical modelling of the current distribution......Page 320
The application of electrochemical chloride extraction to reinforced concrete bridge members......Page 322
The corrosion protection of embedded steel reinforcement in reinforced concrete structures using galvanic anodes......Page 324
Re-alkalisation technology applied to corrosion damaged concrete......Page 326
On pathology and rehabilitation teaching of concrete structures: A case study......Page 328
Comparative study of cleaning techniques to be used on concrete indoors......Page 330
Repair materials and systems......Page 332
Material Data Sheet Protocol – From anarchy to order......Page 334
Utilization of high performance fiber-reinforced micro-concrete as a repair material......Page 336
Properties of modern rendering systems based on mineral binders modified by organic admixtures......Page 338
Low shrinking self-compacting concretes for concrete repair......Page 340
Effects of fiber and silica fume reinforcement on abrasion resistance of hydraulic repair concrete......Page 342
Use of calcium sulfoaluminate cement to improve strength of mortars at low temperature......Page 344
Development of Strain-Hardening Cement-based Composites for the strengthening of masonry......Page 346
Air permeability of hardener-free epoxy-modified mortars as repair materials......Page 348
Performance of corrosion inhibitors in concrete exposed to marine environment......Page 350
Hydrophobic treatments on concrete – Evaluation of the durability and non-destructive testing......Page 352
Application of the NMR-technique to concrete-coatings......Page 354
Durability of adhesion of epoxy coatings on concrete; causes of delamination and blistering......Page 356
Protection and rehabilitation of chemically high stressed concrete surfaces by thin glass......Page 358
Bonded concrete overlays and patch repairs......Page 360
Adhesion – A challenge for concrete repair......Page 362
Concrete repair and interfacial bond: Influence of surface preparation......Page 364
Correlation between the roughness of the substrate surface and the debonding risk......Page 366
Performance of spall repair materials......Page 368
Innovative concrete overlays for bridge-deck rehabilitation in Montréal......Page 370
Mortar mix proportions and free shrinkage effect on bond strength between substrate and repair concrete......Page 372
Evaluation of saturation and microcracking of the superficial zone of concrete: New developments......Page 374
Spalling of sprayed concrete under tunnels fire conditions......Page 376
Repair of slab surface with thin SFRC overlay......Page 378
SHCC repair overlays for RC: Interfacial bond characterization and modelling......Page 380
Modelling the performance of ECC repair systems under differential volume changes......Page 382
Prevention of damages in industrial floors with screed layers......Page 384
Evaluation of the effect of load eccentricity on pull-off strength......Page 386
Proposal of an experimental programme for determining tensile relaxation in bonded concrete overlays......Page 388
Structural repairs and strengthening......Page 390
Analytical modelling of retrofitted reinforced concrete members with flexible bond......Page 392
Experimental and analytical investigation of concrete confined by external pre-stressed strips......Page 394
Flexure and shear behavior of RC beams strengthened by external reinforcement......Page 396
Simplified verification of the bond resistance of externally bonded reinforcement at the area of the support moment......Page 398
Loading test on a retrofitted pretensioned concrete girder after fire......Page 400
Anchorage failure of RC beams strengthened with FRP at the bottom face......Page 402
Strengthening and verification of the prestressed road bridge using external prestressing......Page 404
Numerical simulation of continuous RC slabs strengthened using NSM technique......Page 406
Non-linear finite element modeling of epoxy bonded joints between steel plates and concrete using joint elements......Page 408
Increase in the torsional resistance of reinforced concrete members using Textile Reinforced Concrete (TRC)......Page 410
Rejuvenating our aging structures: Cumberland street parking garage rehabilitation......Page 412
Mountain pass slope failure retrofitted with half viaduct bridge structure......Page 414
Rapid repair of RC bridge columns subjected to earthquakes......Page 416
Rehabilitation problems regarding an over pass in Timisoara – Romania......Page 418
Seismic retrofit and rehabilitation......Page 420
An approach of service life in repair of structures with concrete due to natural hazards......Page 422
Seismic behavior of FRP-upgraded exterior RC beam-column joints......Page 424
3D analysis of seismic response of RC beam-column exterior joints before and after retrofit......Page 426
Seismic assessment of a RC school building retrofitted with innovative braces......Page 428
Seismic response of FRP-strengthened corner RC beam-column joints......Page 430
Experimental investigation on the seismic behaviour of SFRC columns under biaxial bending......Page 432
Retrofitting techniques and FRP systems......Page 434
Feasibility study of a novel prestressing system for FRP-laminates......Page 436
FRP tendon anchorage in post-tensioned concrete structures......Page 438
Durability of CFRP strengthened concrete structures under accelerated or environmental ageing conditions......Page 440
Durability of GFRP composite made of epoxy/organoclay nanocomposite......Page 442
Performance of Reactive Powder Concrete (RPC) with different curing conditions and its retrofitting effects on concrete member......Page 444
Residual strength of SBR-latex modified high strength concrete under repeated impact loading......Page 446
Modeling the behavior of insulated FRP-strengthened reinforced concrete beams exposed to fire......Page 448
Fracture optimization of RC beams strengthened with CFRP laminates with finite element and experimental methods......Page 450
Comparing the behaviour of reinforced HSC beams with AFRP bars and confined HSC beams with AFRP sheets under bending......Page 452
Corroded RC beam repaired with near-face mounted CFRP rods......Page 454
Effect of damaged concrete cover on the structural performance of CFRP strengthened corroded concrete beams......Page 456
Role of U-shaped anchorages on performance of RC beams strengthened by CFRP plates......Page 458
Shear-flexure interaction of RC circular columns strengthened with FRP sheets......Page 460
Strengthening of R/C existing columns with high performance fiber reinforced concrete jacket......Page 462
Retrofitting of a precast industrial building......Page 464
Strength and ductility of unreinforced concrete columns confined with CFRP composites under uniaxial loading......Page 466
Experimental investigation on repair of RC pavements with SFRC......Page 468
Experimental research of performance and strength of damage – Concrete beams strengthening with CFRP using two different epoxies......Page 470
Strengthening of shear wall with high performance RC jacket......Page 472
Author index......Page 474