Don W. Hobbs

Don W. Hobbs's Posts

Countering Alkali-Silica Reaction in Concrete

Before 1976, no concrete aggregates in the United Kingdom were thought to react harmfully with alkalies. But that year researchers found that some structures had indeed cracked because of an alkali-silica reaction (ASR). Most of the affected members are exposed to groundwater, rain, or heavy condensation and the concrete generally contained more than 760 pounds of cement per cubic yard. Read more

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