人工砂碾压混凝土配合比设计研究  

Research on the mix proportion parameters of manufactured sand roller compacted concrete

作　　者：王立华[1,2] 杨永民[1,2] 刘佳[1,2] 詹镇峰[3] 

机构地区：[1]广东省水利水电科学研究院,广东广州510000 [2]广东省水利重点科研基地,广东广州510610 [3]广州大学,广东广州510006

出　　处：《混凝土》2013年第10期124-127,132,共5页Concrete

基　　金：广东省水利厅和乐昌峡水利枢纽工程管理处资助(2006-10)

摘　　要：对人工砂碾压混凝土配合比设计的水胶比、粉煤灰掺量、单位用水量、砂率、浆砂比等参数进行了系统研究。研究表明:随着胶水比增大,碾压混凝土抗压强度线性增大;随着粉煤灰掺量增大,碾压混凝土抗压强度线性减小,但随着龄期增长,减小的比例减小;随着单位用水量增加,碾压混凝土VC线性减小,单位用水量每增加1 kg,VC值平均减小1.0 s;砂率最优时,碾压混凝土VC值最小,土工作性最好。随石粉含量增大,碾压混凝土的浆砂比线性增大,石粉含量每增大4%,浆砂比增大0.01。为了保证碾压混凝土的浆砂比,人工砂石粉含量应控制在18%左右。The mix proportion parameters of manufactured sand RCC such as water-binder ratio, fly ash content, unit water dosage, sand ratio and cement-sand ratio were studied in this study.Results show that,the compressive strength of RCC increases linearly while the binder-water ratio increases, and it decreased linearly while the fly ash content decreases.The unit water dosage increases by each 1 kg, the VC value decreased by the average 1.0 s.With the optimal sand ratio, the VC value of RCC was minimum and the workability was the best. While the stone powder content increases, the cement-sand ratio of RCC increases linearly, stone powder content increases by each 4%, cement-sand ratio increases by 0.01.In order to guarantee the cement-sand ratio of RCC,the manufactured sand powder content should be controlled in 18%.

关 键 词：人工砂 碾压混凝土 配合比 

分 类 号：TU528.062[建筑科学—建筑技术科学]