预期强度的粉煤灰混凝土配合比设计  

Mixture Ratio Design of C40 Fly Ash Concrete

作　　者：易圣辉[1] 吴慧军[1] 冯仲恺[1] 常婷[1] 

机构地区：[1]大连理工大学建设工程学部,大连116023

出　　处：《中国包装科技博览（混凝土技术）》2010年第9期4-7,共4页China Science and Technology Review

摘　　要：在混凝土中掺入粉煤灰可有效地改善混凝土的流动性、粘聚性、保水性，提高混凝土的抗渗性、耐久性及后期强度，并可减少水泥用量，降低生产成本，具有较好的社会效益。本次参赛采用粉煤灰作为掺合料，萘系高效减水剂作为外加剂，按水灰比0．50，砂率41％，粉煤灰取代率15％，超量系数1．2配制混凝土；配制混凝土拌合物工作型满足设计要求，实测抗压强度与设计目标基本一致，单方造价254元。Addition of proper amount of fly ash can enhance the concrete liquidity, cohesive quality, water retention property; improve impermeability, durability, long - term strength, at the same which is beneficial to the society. In the competition, fly ash and time, reduce the amount of cement required, low down the cost, naphthalene - based superplasticizer were used as admixtures Based on the parameters -water- cement ratio 0. 50, the sand ratio 41%, fly ash replacement rate 15%, excess coefficient 1.2, the concrete compressive strength test result was very close to the design target

关 键 词：吭压强度 粉煤灰混凝土 混凝土配合比 经济性 

分 类 号：TU528.31[建筑科学—建筑技术科学]