Improving crack resistance of concrete when using expanding cements

Abstract

The possibility of enhancing the basic properties of concrete products by using a mixture of Portland cement and sulfoalumoferrite clinker as a binder is considered. It was established that upon hydration of the binder, aluminate and ferruginous ettringite are formed, which increase the strength properties of concrete during normal hardening and thermal and wet processing by increasing the strengthening structure. The main sign of hydration of sulfoalumoferrite clinker is the stability of ferrous ettringite, which ensures the compaction of the concrete structure. The dense structure of the structure of concrete, especially the contact zone, when using sulfated clinker, ensures the non-shrinkage of concrete and eliminates shrinkage deformations and, thereby, increases the crack resistance of concrete samples.