| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lightweight concrete composition which satisfies compressive strength and static modulus of elasticity necessary to PC concrete at the water-cement ratio similar to that when normal aggregate is used and is suitable as a PC lightweight concrete member particularly. SOLUTION: This lightweight concrete composition having 47 N/mm2 or higher compressive strength and 22 kN/mm2 or larger modulus of static elasticity is obtained by adding inorganic powder of 5-30% based on fine aggregate and 10-40% based on cement to the lightweight concrete, in which artificial lightweight aggregate is used as the whole or a part of the aggregate to be added, at 40-45% water-cement ratio.</p> |
