| 摘要 |
PURPOSE: A cement concrete composition of high strength, high fluid and low heat is provided, which improves durability and reduces heat of hydration. And a method for preparing the same is also provided. CONSTITUTION: The cement composition of high strength, high fluid and low heat contains 10-40 wt.% of a high strength mixed material based on 100 wt.% of cement, where the high strength mixed material consists of 40-80% of blast furnace water granulation slag, 30-60% of anhydrite and 0-20% of limestone. The method comprises steps of: (i) mixing 40-80% of blast furnace water granulating slag, 30-60% of anhydrite and 0-20% of limestone and pulverizing the mixture to prepare a high strength mixed material; (ii) preparing a high strength, high fluid and low heat cement by substitution mixing 10-40 wt.% of the high strength mixed material based on 100 wt.% of cement; (iii) adding 50-70% of kneading water and 50% of super air entrance plasticizer to the cement of high strength, high fluid and low heat and fine aggregates and stirring them for 30-90 seconds; (iv) adding the remaining kneading water and super air entrance plasticizer to the mixture of the step (iii) and stirring them for 30-90 seconds; and (v) putting thick aggregate in the mixture of the step (iv) and stirring them.
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