基于透水混凝土骨料-水泥浆体界面黏结强度试验研究  

Experimental study on the bonding strength of the interface between aggregate and cement paste in permeable concrete

作　　者：周国涛 张成明 郭京龙 姜官宁 贺金乐 ZHOU Guotao;ZHANG Chengming;GUO Jinglong;JIANG Guaning;HE Jinle(Shandong Highway and Bridge Construction Group Co.,Ltd.,Shandong Jinan 250014 China;Shandong Lujian Construction Engineering Testing Co.,Ltd,Shandong Qingdao 250031 China)

机构地区：[1]山东省公路桥梁建设集团有限公司,山东济南250014 [2]山东省鲁建建筑工程检测有限公司,山东济南250031

出　　处：《山东交通科技》2024年第6期1-4,共4页

基　　金：山东省自然科学基金,项目编号:ZR2021-ME004。

摘　　要：水泥浆体作为透水混凝土黏结材料,其与骨料间的黏结特性决定了透水混凝土的整体性能。通过制备不同界面面积、水泥浆体水灰比和水泥浆包裹厚度的复合试件,采用剪切试验测试水泥浆体黏结强度。结果表明:浆体的黏结强度与界面尺寸、包裹厚度和水灰比成正比,骨料-水泥浆界面的平均抗剪强度均呈逐渐增大的趋势。剪切应力达到峰值时,试件发生脆性破坏,界面破坏时水泥浆体呈现分离破坏和复合破坏两种典型形态,其法向和切向强度比介于0.5~2.0之间。Cement paste is used as the bonding material of pervious concrete,and the bonding characteristics between it and aggregate determine the overall performance of pervious concrete.By preparing composite specimens with different interface area,cement paste water-cement ratio and cement paste wrapping thickness,the bond strength of cement paste was tested by shear test.The results showed that the bond strength of the slurry was proportional to the interface size,parcel thickness and water-cement ratio,and the average shear strength of the aggregatecement paste interface all showed a gradual increasing trend.When the shear stress reaches the peak value,the specimen undergoes brittle damage,and the cement paste presents two typical morphologies of separation damage and composite damage when the interface is damaged,and its normal and tangential strength ratios are between 0.5 and 2.0.

关 键 词：水泥浆体 剪切试验 剪切强度 破坏模式 

分 类 号：U414[交通运输工程—道路与铁道工程]