砂率对C100高强混凝土工作性与强度影响研究

EFFECTS OF SAND RATIO ON THE WORKABILITY AND STRENGTH OF C100 CONCRETE

本文主要研究砂率的变化对大流动度C100高强混凝土的工作性与强度的影响规律,研究结果表明,随着砂率的增加混凝土的工作性先增加后降低,强度随着砂率提高而降低,40%砂率较为适宜。在砂率40%,胶凝材料用量655kg/m^3,水胶比0.20条件下可以制备出28d抗压强度117.9MPa、坍落度245mm、坍落扩展度800mm、T50时间5.9s的低粘度大流动度C100超高强混凝土。

This paper studies the influence of sand ratio on the workability and strength of C100 ultra high strength concrete.The result of research shows that the concrete workability first increases then decreases with the increase of the sand rate,and the strength decreases with the increase of the sand rate,and the 40%sand rate was more suitable.The results indicate that C100 ultra high strength concrete with low viscosity with slump 245 mm,slump spread of 800 mm,T50 of 5.9 s and the compressive strength of 117.9 MPa at 28d have been successfully prepared with W/B of 0.20,binder content of 655kg/m3 and sand ratio of 40%.