【摘要】 分析了粗骨料的尺寸对混凝土过渡区界面黏结性能的影响,并通过劈裂抗拉试验、压剪试验获得了粗骨料和硬化水泥浆之间的劈裂抗拉强度及抗剪强度.结果表明:粗骨料的尺寸对界面过渡区的黏结性能有较大的影响,界面黏结强度随粗骨料尺寸的增大而减小;水灰比越低,界面黏结性能越好;粗骨料的类型对界面过渡区黏结性能也有较大性能的影响.更多还原

【Abstract】 Concrete is a kind of multiphase material,which consists of three phases,including cement paste,aggregate and the interfacial transition zone(ITZ) between cement paste and aggregate.In the three phases,the interfacial transition zone is the weakest phase,especially the interfacial transition zone between cement paste and coarse aggregate.In this paper,the influence of aggregate size and type on the bonding strength at the ITZ was experimentally investigated.Splitting tensile test and compression shear test were used to obtain the bonding strength and shear strength between aggregate and cement paste.It is found that aggregate size has a great effect on the bonding strength at the ITZ.The bonding strength at ITZ decreases with increasing aggregate size.When the water/cement ratio is lower,it could get higher bonding strength at the ITZ.And also,the aggregate type has a great effect on the bonding strength at the ITZ.更多还原