| 摘要 |
<p>PURPOSE: To obtain a cement compsn. which has ad ultra-low exothermic property and is slow in progression of neutralization and with which the cured body of cement, such as mortar and concrete, having excellent durability is producible. CONSTITUTION: This cement compsn. contains clinker, gypsum and limestone. The content of 3CaO.SiO2 in the clinker is 28 to 45wt.%., the content of 2CaO.SiO2 is 40 to 59wt.%, the content of 3CaO.Al2 O3 is 0 to 1wt.% and the content of 4CaO.Al2 O3 .Fe2 O3 is 8 to 13wt.%. This gypsum is the compsn. in such a manner that the content of SO3 attains 1.0 to 3.2wt.%. The limestone is added to the compsn. in such a manner that the limestone content attains 22 to 35wt.%.</p> |
