【摘要】 研究了内掺硅粉对混凝土强度和流动性的影响;根据试验数据总结出内掺硅粉混凝土的28d抗压强度规律;研究了混凝土后期强度的增长规律;采用P.O.42.5普通硅酸盐水泥、中砂、5~25mm碎石,内掺7%硅粉,水胶比0.219,掺加适量的聚羧酸复合缓凝高效减水剂,可配制出C110高强度大流动性混凝土。更多还原

【Abstract】 It was studied that the effect of addition of silica fume on the strength and fluidity of concrete;according to the data obtained from the test,the rule of 28 day compressive strength of concrete with silica fume was summarized,and the increasing rule of later stage strength of concrete was also studied.A C110 high strength and high fluidity concrete can be prepared using grade 42.5 ordinary Portland cement,medium sand,5～25mm broken stone,addition of 7% silica fume,water cementitious materials ratio 0.217,and proper quantity of polymerization Carboxylic acid compound retarding high effect waterreducing agent.更多还原