过硫磷石膏矿渣水泥混凝土安定性控制方法研究  

Study of Control Methods for the Soundness of the Excess-sulfate Phosphogypsum Slag Cement Concrete

作　　者：林宗寿[1] 吕治江[1] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《建材世界》2015年第3期15-19,共5页The World of Building Materials

基　　金：国家高技术研究发展计划(863)项目(2012AA06A112)

摘　　要：硅酸盐水泥熟料掺量对过硫磷石膏矿渣水泥混凝土的后期强度影响很大,熟料掺量过高,过硫磷石膏矿渣水泥混凝土的后期强度将大幅度下降,甚至会造成安定性不良,使混凝土结构破坏。该文对过硫磷石膏矿渣水泥混凝土安定性的控制方法进行了探索,发现通常的水浸法不能在短期内检验过硫磷石膏矿渣水泥混凝土的安定性。控制过硫磷石膏矿渣水泥混凝土7d强度增进率,可有效控制过硫磷石膏矿渣水泥混凝土的后期强度,避免出现安定性不良现象。Addition of the portland cement clinker had great impact on the long-term strength of the excess-sulfate phosphogypsum slag cement concrete. Adding too much portland cement clinker would lead to a significant drop of the long-term strength of the excess-sulfate phosphogypsum slag cement concrete, and it would also cause poor soundness and damage to the concrete structure. This study explored the methods of controlling the soundness of the excess-sul- fate phosphogypsum slag cement concrete. Researchers found that the normal water-immersion method could not test the soundness of the excess-sulfate phosphogypsum slag cement concrete in short-term. Researchers found that con- trolling the rate of 7 days strength development of the excess-sulfate phosphogypsum slag cement concrete could effec- tively control the long-term strength and the soundness of the excess-sulfate phosphogypsum slag cement concrete.

关 键 词：过硫磷石膏矿渣水泥 安定性 控制方法 

分 类 号：TU528[建筑科学—建筑技术科学]