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10971: Modelling, non-destructive testing and Li-based remediation of deleterious Alkali-Silica Reaction in concrete structures

Alkali Silica Reaction (ASR) is a silent killer of concrete as it often becomes apparent only five to 15 or more years after placement, and is also often misdiagnosed. Left untreated, ASR can continue to cause further expansion and cracking, which negatively influences tensile strength and eventually the structural capacity. Secondly, ASR may render the affected concrete vulnerable to additional deterioration, such as increased penetration of chloride which causes corrosion of reinforcing steel, attack by freezing and thawing and sulphates. Hence, detection, prevention and mitigation of ASR is of critical concern when designing structures for long-term durability. Therefore it is of utmost importance to achieve better understanding of the fundamentals of the governing mechanisms of ASR, its prevention and remediation. This is the objective of this research project, covering the complete knowledge chain from fundamentals of degradation up to underpinned remediation methods.