大连理工大学学报2011，Vol.51Issue(4)：549-554,6.
混凝土基体材料断裂特性试验研究
Experimental study of fracture properties of concrete matrix materials
摘要
Abstract
The fracture properties of cement paste and mortar which are two most basal matrix materials of concrete were studied using three groups of three-point bending beams with different sizes and strengths.A complete P-CMOD curve was directly obtained,and the initial cracking load was determined.The experimental results show that the resistance to crack propagation in matrix is enhanced due to sand aggregate in the matrix,even though the grain size used is very small.Cement paste is not an ideal brittle material,an apparent stable crack propagation before unstable failure is observed in cement paste,and this stable stage is shortened with the compressive strength increasing.The larger the size is,the earlier the crack initiation is,and the longer the stable crack propagation stage becomes.Therefore,based on the hydraulic engineering concrete fracture testing specification,the double-K fracture parameters were calculated for cement paste and mortar.The discussion on the obtained results was made.关键词
混凝土/水泥净浆/水泥砂浆/断裂/三点弯曲切口梁Key words
concrete/cement paste/mortar/fracture/three-point bending notched beam分类
建筑与水利引用本文复制引用
朱榆,徐世烺,赵瑾..混凝土基体材料断裂特性试验研究[J].大连理工大学学报,2011,51(4):549-554,6.基金项目
国家自然科学基金资助项目 （）
“九七三”国家高技术研究发展计划资助项目 （）
