高性能矿物掺和料对砂浆断裂脆性影响的研究  

Research of Effect of High Performance Mineral Admixtures on Brittle Fracture of Mortar

作　　者：施惠生[1] 邓恺[1] 

机构地区：[1]同济大学先进土木工程材料教育部重点实验室,上海200092

出　　处：《建筑材料学报》2008年第6期631-635,共5页Journal of Building Materials

基　　金：国家高科技发展计划(863)项目(2006AA06Z363);国家重点基础研究发展规划(973)项目(2001CB610704)

摘　　要：用三点弯曲法研究了不同种类和掺量的矿物掺和料对砂浆断裂脆性的影响.通过对断裂韧度(K1C)、断裂能(GF)和裂缝尖端部开口位移(CTOD)等断裂参数的测定,发现矿物掺和料具有提高砂浆断裂韧性和断裂能的作用,并能大幅增加砂浆的CTOD值;40%(质量分数)的掺和料取代量对于砂浆断裂韧性和断裂能具有最显著的提高作用.The influence of mineral admixtures on brittle fracture of mortar was investigated through three-point-bending test. The research results show that the mineral admixtures have the ability of improving the brittleness of mortar in comparison with parameters of the fracture properties such as KIC, GF and CTOD（crack tip opening displacement）. It is also surely concluded that the replacement of 40 % （by mass）mineral admixture has the best ability of enhancing KIC and GF.

关 键 词：矿物掺和料 砂浆 脆性 

分 类 号：TU528.041[建筑科学—建筑技术科学]