nonshrinking cement
Quick Summary
Expanding and nonshrinking cements are types of cement that slightly expand when they hydrate. This expansion helps to counteract the minor contraction that occurs when fresh concrete dries for the first time. These cements were first developed in France around 1945. The American version is a combination of portland cement and an expansive agent. This agent is created by heating a mixture of chalk, bauxite, and gypsum.1
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