Macro defect free cement with improved moisture resistance

摘要

A cementitious composition may include polyvinyl alcohol, high alumina cement, water, a metallic coagent, a peroxide crosslinking initiator, and an organic acid retardant. A molded article may be manufactured from the cementitious composition by preparing a hydrogel pre-polymer blend of saponified polyvinyl alcohol acetate (PVAA) with greater than or equal to approximately 85% saponified PVAA, and water, mixing the hydrogel pre-polymer blend with high alumina cement (HAC) using a high shear mixing process, mixing in a metallic coagent and a peroxide crosslinking initiator, mixing in an organic acid retardant, and hot press molding the mixture.

主权项

1. A cementitious composition, comprising:
polyvinyl alcohol;
high alumina cement;water;a metallic coagent, wherein the metallic coagent is selected from the group comprising: zinc diacrylate (ZDA), zinc monoacrylate (ZMA), zinc dimethacrylate (ZDMA), calcium diacrylate (CDA), aluminum triacrylate, and magnesium diacrylate; anda peroxide crosslinking initiator.