IMPROVING THE FREEZE-THAW DURABILITY OF DRY CAST CEMENTITIOUS MIXTURES

摘要

An improved freeze-thaw durability dry cast cementitious composition is provided that uses very small (0.1 gm to 100 ~m average diameter) polymeric microspheres that are blended directly into the mixture and optionally gas-generating additives. The polymeric microspheres provide void spaces in the material matrix that act to increase freeze-thaw durability of the material. In this dry cast cementitious composition, polymeric microspheres actas pre-formed voids.