Bridges
Management of Concrete Bridge Structures to extend their Service Life
- Publication no: AP-T11-01
- ISBN: 0 85588 597 1
- Published: 1 January 2000
- PDF (free) Download
This is a consolidated report from the work undertaken as part of the project "Management of Concrete Structures to Extend their Service Life" which sought to assist Austroads Member Authorities in managing their bridge assets. With Austroads member authorities at different stages in the development of investigation techniques for structures affected by the deterioration of concrete, this report provides a synthesis of current practice and recommendations for enhancement of ways of determining management strategies and for providing a basis for service life prediction. The report includes: a review of corrosion processes a state-of-the-art review on the development of models for service life prediction for concrete structures guidelines for avoiding corrosion damage to new structure
- Executive Summary
- 1. INTRODUCTION
- 1.1. General Information
- 1.1.1. Loss of alkalinity by carbonation
- 1.1.2. Chloride ions in concrete and corrosion of steel
- 1.2. Detection and Assessment of Corrosion
- 1.2.1. Half-cell potential survey
- 1.2.2. Resistivity measurements and corrosion rate
- 1.2.3. Linear polarisation resistance
- 1.2.4. AC Impedance technique
- 1.2.5. Chemical techniques
- 2. STRUCTURE OF THIS REPORT
- 2.1. General Information
- 2.2. Physical, Chemical and Mechanical Tests
- 2.3. Half-Cell Potential and Resistivity Measurements
- 2.4. Assessment Methodology – DIER Tasmania
- 2.5. Assessment Methodology, VicRoads
- 2.6. Assessment Methodology, RTA NSW
- 2.7. Assessment Methodology, Queensland DMR
- 2.8. Assessment Methodology, WA
- 2.9. Comparison of Assessment Methodologies Used by SRAs
- 1 — GENERAL CORROSION INFORMATION
- 2 — REVIEW OF SRAs CONDITION SURVEY REPORTS
- 3 — REVIEW OF SERVICE LIFE PREDICTION OF REINFORCED CONCRETE BRIDGES
- 4 — CONDITION ASSESSMENT OF THREE VICTORIAN BRIDGES
- 1: GENERAL INFORMATION ON CORROSION OF STEEL REINFORCEMENT IN CONCRETE
- 2: ASSESSMENT METHODS USED BY SRAs
- 3: SUMMARY OF RESULTS OF SRAs CORROSION CONDITION SURVEY
- 3.1. General
- 3.2. DIER, Tasmania
- 3.3. VicRoads, Victoria
- 3.4. Roads and Traffic Authority, New South Wales
- 3.5. Department of Transport and Works, Northern Territory
- 3.6. Department of Transport, South Australia
- 3.7. Queensland Department of Main Roads
- 3.8. Main Roads, Western Australia
- 3.9. EXTENT OF DAMAGE
- 3.10. DISCUSSION
- 3.11. EXTENT OF LIABILITY WITH RESPECT TO CORROSION DAMAGE
- 4: MODELS FOR SERVICE LIFE PREDICTION
- 4.1. THE DEFINITION OF SERVICE LIFE
- 4.2. LABORATORY - BASED PREDICTIONS
- 4.3. MATHEMATICAL MODELS
- 4.4. Service Life Based On Reinforcement Corrosion
- 4.5. Estimation of the Time of Initiation of Corrosion
- 4.5.1. Initiation time of chloride induced corrosion
- 4.5.2. Initiation time of carbonation induced corrosion
- 4.5.3. Initiation time indicated by the on-site measured corrosion rates
- 4.6. Propagation of Corrosion
- 4.7. Other Deterioration Processes
- 4.7.1. Sulfate attack
- 4.7.2. Leaching
- 4.8. STOCHASTIC METHODS
- 4.10. SUMMARY AND NEED FOR FUTURE MODELLING RESEARCH
- 5: INVESTIGATION OF THREE VICROADS BRIDGE STRUCTURES
- 5.1. INVESTIGATION OF BRIDGES
- 5.2. RESULTS
- 5.2.1. LYNCH’S BRIDGE
- 5.2.2. Footscray Road Bridge Over Moonee Ponds Creek (Melbourne Bound)
- 5.2.3. Racecourse Road Bridge Over Moonee Ponds Creek
- 5.3. Service Life of the Three Victorian Bridges
- 5.3.1. Lynch’s Bridge
- 5.3.2. Footscray Road Bridge
- 5.3.3. Racecourse Road Bridge
- 5.4. Remedial Options for Bridges
- 5.4.1. . Monitoring
- 5.4.2. Preserving and preventive actions
- 5.4.3. Repair and Strengthening
- 5.5. Recommendations for the Three Victorian Bridges
- 5.5.1. Lynch’s Bridge
- 5.5.2. Footscray Bridge
- 5.5.3. Racecourse Bridge
- 6. SUMMARY
- REFERENCES
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