| 摘要 |
<p>PURPOSE:To provide a cement admixture using a high performance water reducing agent as a base material and a cement composition which are widely used for general civil engineering works and building constructions and for concrete products, reduced in viscosity of mortar or concrete and prevent initial drying cracks, etc., before hardening. CONSTITUTION:The cement admixture is produced by compounding high performance water reducing agent, one kind or more inorganic substances selected from the group of bentonite, phlogopite, graphite, talc, boron nitride, zeolite, activated carbon, coal cinders, diatomaceous earth, perlite and attapulgite, and an inorganic alkali salt, and the cement composition consists of cement and the cement admixture.</p> |
