CEMENT-BASED GROUTING MATERIAL COMPOSITION FOR MENDING

摘要

PURPOSE:To provide a cement-based grouting material composition for mending having excellent grouting performance, bonding strength, durability, etc. CONSTITUTION:The objective cement-based grouting material composition for mending is composed of (1) 30-80 pts.wt. of Portland cement classified to a maximum particle diameter of =20mum, (2) 20-70 pts.wt. of fine powder of blast furnace slag classified to a maximum particle diameter of =20mum, (3) 0.5-3 pts.wt. of a high-condensation product of melaminesulfonic acid and formaldehyde, (4) 0.05-0.5 pts.wt. of a water-soluble cellulose derivative and (5) 1-5 pts.wt. of an alkali metal nitrite and/or alkaline-earth metal nitrite.