Multi-powder dam concrete with high performance and low adiabatic temperature rise
Based on the fluidity, strength, heat of hydration and loop crack resistance experiment of multi-powder paste, the components and proportion of multi-powder were optimized and the concrete properties were studied. The multi-powder consists of limestone powder, slag, fly ash and moderate heat Portland cement (PMH cement). The results show that the compressive strength of the multi-powder paste and mortar is close to those of PMH cement, fly ash paste and mortar currently used in dam concrete, yet the flexural strength is relatively higher. The multipowder paste is featured by larger fluidity, lower heat of hydration and delayed cracking time. In comparison, less unit water consumption and cement is used in multi-powder concrete, and under premise of equal mechanical performance, deformation, thermal performance and durability, the adiabatic temperature rise at 28 d is reduced by 2 ℃. In this way, the crack resistance is improved and it is feasible both technically and economically to produce HPC for daM concrete.
multi-powder paste dam concrete high performance concrete crack resistance adiabatic temperature rise
LI Xin-yu CHEN Wen-yao CHEN Wei-min
Hydrochina Huadong Engineering Corporartion, Hangzhou 310014, China China Three Gorges Project Corporation,Yichang 430002, China
国际会议
2009 Frontier Symposium of China Postductors on Materrials Science(2009年中国博士后材料科学前言论坛)
长沙
英文
727-733
2009-11-22（万方平台首次上网日期，不代表论文的发表时间）