集灰比对无机保温砂浆黏结强度及断裂性能的影响  

Influence of mass ratio of aggregate to power material on the bonding strength and fracture mechanism of inorganic thermal insulation mortar

作　　者：李杰 米胜东[1] 李俊毅[1] LI Jie;MI Sheng-dong;LI Jun-yi(CCCC Tianjin Port Engineering Institute Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]中交天津港湾工程研究院有限公司,天津300222

出　　处：《中国港湾建设》2020年第12期25-28,63,共5页China Harbour Engineering

摘　　要：为研究集灰比对无机保温砂浆黏结强度及断裂性能的影响,通过改变集灰比,研究了保温砂浆拉伸黏结强度、抗拉强度及其与黏结断裂断面位置的关系,并利用聚合物水泥砂浆和混凝土的黏结断裂模型解释保温砂浆的拉伸黏结断裂。结果表明,保温砂浆与防护砂浆、保温砂浆与装饰砂浆的拉伸黏结强度均随集灰比的增大而减小;保温砂浆黏结试件拉伸断裂后的断面位置由拉伸黏结强度及保温砂浆的抗拉强度共同决定,断面位于黏结界面时,拉伸黏结强度测试值等于实际界面黏结强度;断面位于保温砂浆内部时,拉伸黏结强度测试值低于实际界面黏结强度,此时用前者表示后者反而可靠。To study the influence of mass ratio of aggregate to power material on the bonding strength and fracture mechanism of inorganic thermal insulation mortar,the relationship between the tensile bond strength,tensile strength,and fracture position of bonding section of the thermal insulation mortar were studied in different mass ratio of aggregate to power material.The bond fracture model of polymer cement mortar and concrete was used to explain the tensile bond fracture of thermal insulation mortar.The results show that the tensile bond strength of thermal insulation mortar and protective mortar,thermal insulation mortar and decorative mortar decreases with the increase of mass ratio of aggregate to power material,the fracture surface position of the thermal insulation mortar bonded specimen after tensile fracture is determined by tensile bond strength and tensile strength of thermal insulation mortar.When the fracture surface is located in the bonding interface,the test value of tensile bond strength is equal to the actual interface bond strength.When the fracture surface is located in the cohesion layer of thermal insulation mortar,the test value of tensile bond strength is less than the actual interface bond strength.In this case,the former is used to indicate that the latter is reliable.

关 键 词：玻化微珠 保温砂浆 拉伸黏结强度 断面位置 断裂力学 

分 类 号：TQ177.6[化学工程—硅酸盐工业]