粉煤灰和矿粉含量对混凝土抗硫酸盐腐蚀影响的试验研究  

Effects of the content of fly ash and slag on the resistance to sulfate of concrete

作　　者：聂庆科[1,2] 白冰[3] 李华伟[1,2,3] 韩松[3] 王英辉[1,2] 

机构地区：[1]河北建设勘察研究院有限公司,河北石家庄050031 [2]河北省岩土工程技术研究中心,河北石家庄050031 [3]北京交通大学土木建筑工程学院,北京100044

出　　处：《混凝土》2015年第7期1-3,共3页Concrete

基　　金：国家重点基础研究发展计划(973计划)项目(2015CB0578000)

摘　　要：在普通硅酸盐水泥混凝土中加入一定的粉煤灰和矿粉来改善混凝土的抗硫酸盐腐蚀性能是可行的。研究表明,掺入10%、20%和30%的粉煤灰能够满足各个强度等级混凝土的抗硫酸盐性能指标。对于S95矿粉,在高强混凝土中(C40、C45)掺量达到30%,仍然可以满足混凝土抗硫酸盐性能指标,而强度稍低的混凝土(C30、C35)中,经过150次硫酸盐侵蚀后试件强度已经低于70%,未能达到标准要求。在各个强度等级配合比中,掺粉煤灰的混凝土抗硫酸盐性能要明显优于掺矿粉,但掺料掺量增加后试件抗硫酸盐性能稍有下降。Anti-corrosion performance by adding fly ash and slag powder in the ordinary Portland cement concrete to improve concrete was studied. Studies show that the demands of various strength of several concrete resistance to sulfate can be satisfied by adding 10%, 20%and 30% fly ash.For the S95 slag powder,the high strength concrete（C40,C45）can reach to the content of 30%and still meet the concrete resistance to sulfate performance index.However,for the slightly lower strength concrete（C30,C35）,subjecting to 150 times of sulphate erosion test,the strength is lower than 70%,which failed to meet the demand. On the other hand,for all strength tests of sample, sulfate resistance of fly ash concrete is much better than the mineral admixture,but the sulfate resistance of concrete is decreased slightly with the increases of admixture content.

关 键 词：高强混凝土 抗硫酸盐腐蚀 矿粉 粉煤灰 

分 类 号：TU528.01[建筑科学—建筑技术科学]