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地聚合物混凝土界面过渡区粘结强度研究
作者：李克亮1，2，马毅1，3，陈爱玖1，2，汪志昊1，2，马军涛1，2，龚勃旭1
（1.华北水利水电大学，河南 郑州 450045；
2.河南省废物利用技术与装备工程研究中心，河南 郑州 450045；
3.郑州工业应用技术学院，河南 郑州 451150）
摘要：试验研究了水胶比、矿渣粉与粉煤灰质量比、水玻璃模数、Na2O含量、骨料种类等5个因素对地聚合物混凝土界面过渡区（ITZ）粘结强度的影响规律，并分析了干湿循环作用下的粘结强度劣化程度。研究表明：随着水胶比、矿渣粉与粉煤灰质量比、水玻璃模数、Na2O含量的增加，ITZ粘结强度先逐渐提高至最大值，然后逐渐降低；当使用大理石作为骨料时，所有龄期的ITZ粘结强度均高于使用花岗岩作为骨料时的粘结强度；以自来水为介质的干湿循环试验中，随着干湿循环次数的增加，ITZ粘结强度不断降低。
关键词：地聚合物混凝土；界面过渡区；粘结强度；干湿循环
中图分类号：TU528 文献标识码：A 文章编号：1001-702X（2020）09-0139-04
Study on ITZ bond strength of geopolymer concrete
LI Keliang1，2，MA Yi1，3，CHEN Aijiu1，2，WANG Zhihao1，2，MA Juntao1，2，GONG Boxu1
（1.North China University of Water Resources and Electric Power，Zhengzhou 450045，China；
2.Waste Utilization Technology and Equipment Engineering Research Center of Henan，Zhengzhou 450045，China；
3.Zhengzhou University of Industrial Technology，Zhengzhou 451150，China）
Abstract：A series of researches on bond strength of interfacial transition zone（ITZ） in geopolymer concrete were carried out. The influence rules on ITZ bond strength affected by 5 factors were investigated. The factors included the mass ratio of water to binder the mass ratio of granulated blast furnace slag powder to fly ash，modulus of water glass，Na2O dosage and aggregate type. Deterioration degree of ITZ bond strength was analyzed at the condition of dry-wet cycles. Bond strengths of ITZ increase firstly，and then decrease，when the mass ratio of water to binder，the mass ratio of slag powder to fly ash，modulus of water glass and Na2O dosage increase. When marble aggregate is used，the bond strength at all ages is higher than that of ITZ with granite aggregate. In dry-wet cycle test using tap water，with the increase of dry-wet cycle times，bond strengths continuously decrease.
Key words：geopolymer concrete，interfacial transition zone，bond strength，dry-wet cycle