特细砂水工混凝土配合比设计的“三低一超”法  

The method of “three-low and one excess” of design of mix proportion of superfine sand hydraulic concrete

作　　者：谢祥明[1] 黄绪通[1] 

机构地区：[1]广东水电二局股份有限公司,广州增城511340

出　　处：《混凝土》2003年第8期55-56,60,共3页Concrete

摘　　要：　作者通过对"低砂率、低坍落度、低水泥用量和超掺粉煤灰"特细砂水工大体积混凝土有关性能的试验研究和施工实践,发现"三低一超"法可以明显改善特细砂水工混凝土的物理力学性能、体积稳定性和经济性,能明显降低混凝土水化热和减小特细砂混凝土早期的塑性收缩和中长期干缩。The performances of mass concrete of hydraulic structure engineering prepared with superfine sand were studied under the condition of low sand ratio, low slump value and low cement consumption and excess fly ash. We found that the method of 'threelow and oneexcess' can improve the physicalmechanical, volume stability and economy of superfine sand concrete obviously, as well as reduce the hydration heat and plastic shrinkage of concrete markedly.

关 键 词：特细砂混凝土 配合比设计 砂率 坍落度 超掺 

分 类 号：TU528.56[建筑科学—建筑技术科学]