冻融环境下废旧纤维混凝土与旧混凝土粘结面劈拉试验  

Split tensile test of the bonding surface between waste fiber reinforced concrete and old concrete under freeze thaw environment

作　　者：李妍[1] 贺柱国 LI Yan;HE Zhu-guo(School of civil engineering,Jilin Jianzhu university,Changchun 130118,China)

机构地区：[1]吉林建筑大学土木工程学院,长春130118

出　　处：《吉林建筑大学学报》2020年第2期19-22,42,共5页Journal of Jilin Jianzhu University

基　　金：吉林省科技发展计划项目(20170414018GH),吉林省教育厅项目(JJKH20190817KJ).

摘　　要：采用工业废旧纤维混凝土与旧混凝土粘结立方体试件,通过慢速冻融试验探讨工业废旧纤维混凝土与旧混凝土粘结面在水饱和状态下纤维掺量、冻融循环次数对粘结面劈裂抗拉强度的影响,界面剂选用水泥砂浆,纤维掺量为0%,0.5%,1.0%和1.5%.试验结果表明,粘结面的劈裂抗拉强度随着冻融循环次数的增加而降低,废旧纤维的掺入能够提高复合立方体粘结面的抗冻劈拉性能且随着纤维体积率的增加而提高.Using an industrial waste fiber concrete and old concrete bonded cube test piece,the slow freeze-thaw test was used to investigate the fiber content and the number of freeze-thaw cycles on the bonding surface of the industrial waste fiber concrete and old concrete bonding surface under water saturation.The effect of splitting tensile strength,cement mortar is used as the interface agent,and the fiber content is 0%,0.5%,1.0%,1.5%.The test results show that the split tensile strength of the bonding surface decreases with the increase of the number of freeze-thaw cycles,and the incorporation of waste fibers can improve the freeze splitting and tensile performance of the bonding surface and increase with the increase of the fiber volume ratio.

关 键 词：工业废旧纤维 纤维掺量 冻融循环 劈拉强度 新旧混凝土粘结面 

分 类 号：TU528.525[建筑科学—建筑技术科学]