粉煤灰掺量对混凝土抗冻性能影响的试验研究  

Experimental research of the effect of fly ash on the frost resistance of concrete

作　　者：逄增伟 殷惠光[1] 张连英[1] 刘瑞雪[1] 李兵[1] 王泽卿 

机构地区：[1]徐州工程学院土木工程学院,江苏徐州221018

出　　处：《混凝土》2015年第8期53-55,62,共4页Concrete

基　　金：江苏省产学研前瞻性联合研究项目(BY2012085);住房和城乡建设部科学技术项目(2013-K4-22;2014-K4-042);江苏省高校自然科学研究项目(11KJD130002);徐州市科技计划项目(XZZD1320);国家建筑材料行业科技创新计划--面上研究项目(2013-M5-7;2014-M5-2;2014-M5-1);江苏省"青蓝工程"项目

摘　　要：对掺加粉煤灰的C60混凝土进行了快速水冻试验研究,试验表明:掺入20%、35%及不掺粉煤灰的混凝土试件的质量损失规律相似,且经过90次冻融循环后,三者的相对动弹模量均为60%左右,试件没有破坏;而掺入50%粉煤灰混凝土质量损失最大,在90次冻融循环后达到了0.591%,其相对动弹模量为47%,试件已经破坏。从而可以看出:掺入粉煤灰对混凝土的抗冻性能没有明显的改善,掺入过量反而会降低混凝土的抗冻性能。The rapid freezing water experimental study on C60 concrete mixed with fly ash was conducted, and the experiments show that the mass loss law of concrete specimens mixed with 20%and 35%fly ash is similar to that of concrete with no fly ash.And after 90 freezing- thawing cycling,the relative dynamic modulus of elasticity of the three were about 60%with no damage. The mass loss of concrete specimens mixed with 50%fly ash is the largest. After 90 freezing - thawing cycles, the mass loss of concrete with 50%fly ash reached 0.591%the relative dynamic modulus of elasticity was 47%, with the specimen destroyed.Which can be seen fly ash has no sig- nificant improvement on the frost resistance of concrete, but excess fly ash will reduce the frost resistance of concrete.

关 键 词：粉煤灰 矿粉 混凝土 抗压强度 渗透性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]