含掺合料混凝土氯盐侵蚀后孔结构特征试验研究  

Experimental study on influence of mineral admixture on pore structure of concrete after chloride corrosion

作　　者：殷惠光[1,2] 张连英[1] 李雁[1] 刘瑞雪[1,2] 李兵[1,2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]徐州工程学院土木工程学院,江苏徐州221018

出　　处：《混凝土》2014年第10期44-47,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);国家建筑材料行业科技创新计划--面上研究项目(2013-M5-7);徐州市科技计划项目(XZZD1320);江苏省"青蓝工程"项目;江苏省高校自然科学研究项目(11KJD130002)

摘　　要：对氯盐侵蚀后不同掺合料混凝土进行了压汞试验,从细观角度研究了掺合料对混凝土孔结构特征的影响。结果表明:单掺粉煤灰20%、35%和50%以及单掺矿粉35%和50%,均有效降低了混凝土的总孔隙率,单掺50%矿粉时总孔隙率最小;单掺粉煤灰20%、35%以及单掺矿粉35%和50%,均有效降低了混凝土的总孔面积,单掺50%矿粉时总孔面积最小;单掺粉煤灰20%、35%和50%以及单掺矿粉35%和65%,均有效降低了混凝土的平均孔径,且单掺65%矿粉时平均孔径最小;单掺粉煤灰35%和50%及单掺矿粉65%时,最可几孔径较基准混凝土明显减小,混凝土孔径得到细化;单掺粉煤灰35%和50%以及单掺矿粉35%和65%均使多害孔、有害孔比例减小,且粉煤灰掺量在50%左右,有害孔比例最小,混凝土抗渗性能最好。The pore structure feature of concrete mixed with mineral admixture after chloride corrosion was studied through MIP.The results showed that fly ash（20%,35%,50%）and slag（35%,50%）reduced the porosity,and the porosity was the least when the SG＇s percentage was 50%.Fly ash（20%,35%）and slag（35%,50%）reduced the total pore area,and the total pore area has a minimum value when the SG＇s percentage was 50%.Fly ash（20%,35%,50%）and slag（35%,65%）reduced the average pore size,and the value became lowest when the SG＇s percentage was 65%.Fly ash（35%.50%）and slag（65%）reduced the most probable aperture.Fly ash（20%,35%,50%）and slag（35%,65%）reduced the percentage of much harm pore and the harmful pore.When the dosage of fly ash was around 50%,the pore structure and anti-penetrability performance of concrete became best because the percentage of harmful pore was the lowest.

关 键 词：粉煤灰 矿粉 混凝土 压汞试验 孔结构 

分 类 号：TU528.01[建筑科学—建筑技术科学]