CEMENT ADDITIVE FOR REDUCING SHRINKAGE

摘要

PURPOSE:To prevent the aggregation of a cement additive for reducing shrinkage when the additive is mixed with cement and to make it possible to handle the additive in the same way as other cement admixture by allowing a liq. org. shrinkage reducing agent to be absorbed in powder having oil absorbing property. CONSTITUTION:This cement additive for reducing shrinkage is formed by allowing a liq. org. shrinkage reducing agent to be absorbed in inorg. or org. powder having oil absorbing property. The inorg. powder may be fibrous magnesium oxysulfate, perlite or calcium carbonate. The org. powder may be balloons of phenol resin, polyvinylidene chloride or urea resin.