Calcined clays in modern construction materials – Fundamentals and application potentials

The use of calcined clays as additions in mortars and concretes goes back to antiquity. In the context of current sustainability discussions – as well as due to the increasingly greater demands placed on the technical performance of modern construction materials – calcined clays are increasingly coming again into the focus of interest. Here, three main areas of applications have become apparent:

a) Use as additions to concrete

b) Use as principal constituent in Portland composite cements

c) Use as alumo-siliceous constituent in geopolymer  

While the use of geopolymers in the construction...

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