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Alkali-silica reaction; confined concrete; crack orientation; mechanical properties degradation; rate of expansion;Siliceous and dolomitic limestones; Mitigation; Silica content; Rate of expansion; Concrete deterioration; ASR in field concrete
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Full-Text Articles in Engineering
Microscopic And Image Processing Characterization Of Aggregates To Predict Asr Expansion Potential Of Concrete, Ammar Elfatih Abdelssamd Elhassan
Microscopic And Image Processing Characterization Of Aggregates To Predict Asr Expansion Potential Of Concrete, Ammar Elfatih Abdelssamd Elhassan
Doctoral Dissertations
Preventing ASR occurrence in new concrete structures requires reliable and quick methods to identify reactive aggregates and to evaluate proper mitigation alternatives. The current accelerated mortar-bar expansion tests (ASTM C 1260 or ASTM C1567) and the concrete prism expansion test (ASTM C 1293) have been reported to have several limitations. Assessment of the extend of ASR damage in existing affected structures requires more understanding on how ASR expansion and damage develop in field conditions such as under confinements and under relatively slow rate of ASR reaction.
The significance of ASR expansion rate and bi-axial restrain on concrete degradation has been …