| 摘要 |
<p>PURPOSE:To improve the cracking resistance of the mortar by mixing and kneading a base material consisting of a blast-furnace granulated slag powder, cement, anhydrous gypsum and/or gypsum dihydrate, specified water reducing agent, aggregate and water and various additives, as required. CONSTITUTION:From 25 to 60%, by weight, blast-furnace granulated slag, 25-60% cement and 10-15% anhydrous gypsum and/or gypsum dihydrate are mixed to obtain a base material. Subsequently, 0.1-0.5 pts.wt. water reducing agent such as a (meth)acrylic acid-based copolymer consisting of a building unit derived from polyalkylene glycol mono(meth)acrylate-based monomer and a building unit derived from a (meth)acrylic monomer, 80-150 pts.wt. aggregate having <=3mm maximum grain diameter and in which the ratio of the grains having <=0.15mm diameter is controlled to <=7%, 30-50 pts.wt. water and 0.005-0.2 pts.wt. defoaming agent and 0.05-0.2 pts.wt. water retaining agent, as required, are added to 100 pts.wt. of the base material, mixed and kneaded to obtain a highly fluidized mortar.</p> |
