Recommended Practice for Accelerated Strength Testing and Evaluation of Concrete (First Revision)
IRC 85 (First Revision, 2015) provides recommended practices for accelerated strength testing and evaluation of concrete, specifically for road and airfield construction projects. It outlines procedures for accelerated curing of concrete specimens, apparatus requirements, and methods to estimate 28-day compressive and flexural strength from accelerated one-day test results. This standard is essential for engineers and quality control personnel seeking faster strength assessment to facilitate early decision-making during construction.
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2015Edition
Roads and Bridges IRC- Indian road congress Category
IRC 85 (First Revision, 2015) provides recommended practices for accelerated strength testing and evaluation of concrete, specifically for road and airfield construction projects. It outlines procedures for accelerated curing of concrete specimens, apparatus requirements, and methods to estimate 28-day compressive and flexural strength from accelerated one-day test results. This standard is essential for engineers and quality control personnel seeking faster strength assessment to facilitate early decision-making during construction.
Audience
Who Uses This Standard
Civil Engineers
Quality Control Engineers
Concrete Technologists
Construction Project Managers
Laboratory Technicians
Materials Testing Specialists
Highway and Pavement Engineers
Contents
Key Topics Covered
✓Accelerated curing principles
✓Apparatus specifications for accelerated curing
✓Preparation and curing of concrete specimens
✓Testing procedures for compressive and flexural strength
✓Correlation between accelerated and standard curing strengths
✓Estimation of 28-day strength from accelerated tests
✓Statistical analysis and regression for strength estimation
✓Use of mild steel moulds for specimen curing
✓Field application of water bath curing
✓Cooling and handling of specimens post-curing
✓Quality acceptance criteria for cement concrete
✓Data interpretation and confidence intervals
Structure
Table of Contents
1Introduction▼
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2Scope▼
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3Working Principle of Accelerated Curing▼
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4Apparatus for Accelerated Curing▼
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4.1Water Bath▼
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4.2Water Bath in the Field▼
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4.3Mould for Concrete Specimens▼
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5Procedure▼
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6Estimation of 28-Day Strength▼
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Annexure-ITest Results▼
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Frequently Asked
Popular Questions About IRC 85
?What is the procedure for accelerated curing of concrete specimens according to IRC 85?▼
Detailed answer not available.
?How does accelerated curing correlate with standard 28-day curing strength?▼
Detailed answer not available.
?What apparatus is recommended for accelerated strength testing in the field?▼
Detailed answer not available.
?How are concrete specimens prepared and handled during accelerated strength testing?▼
Detailed answer not available.
?What statistical methods are used to estimate 28-day strength from accelerated test results?▼
Detailed answer not available.
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