| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a concrete composition excellent in strength manifestation in spite of using the large quantity of fly ash by using partially a blast furnace slag powder and properly setting a concrete composition. SOLUTION: In this concrete composition containing cement, an aggregate, the fly ash, the blast furnace slag powder and water, the weight ratio of fly ash/blast furnace slag powder is controlled to 70:30 to 95:5 and the total quantity of the fly ash and the blast furnace slag powder is controlled to >=10% of the aggregate volume.</p> |
