砂浆-骨料界面拉伸软化性能试验.pdfVIP

学兔兔 第28卷 第1期 建筑科学与工程学报 Vo1．28 NO．1 2O11年 3月 Journal of Architecture and Civil Engineering Mar．2O11 文章编号：1673 2049(2011)01 0091-05 砂浆一骨料界面拉伸软化性能试验 朱亚超，宋玉普，王立成 (大连理工大学 海岸和近海工程国家重点实验室，辽宁 大连 116024) 摘要：对砂浆一骨料复合试件进行了劈裂试验和三点弯曲试验，基于试验结果和改进的J积分计算 方法，提出了砂浆一骨料界面的拉伸软化曲线模型及其表达式。分析结果表明：砂浆基体的特性和 粗骨料表面的粗糙度对砂浆一骨料界面的力学性能具有重要影响；界面断裂能随着砂浆基体强度的 提高和骨料表面粗糙度的提高而提高；基体为普通强度砂浆的试件断裂多发生在界面附近的砂浆 粘结层上；基体为高强度砂浆的试件断裂多发生在砂浆粘结层和砂浆一骨料接合处的粘结层上。 关键词：砂浆一骨料界面；劈裂试验；三点弯曲试验；粗糙度；断裂能；拉伸软化曲线 中图分类号：TU528．01 文献标志码：A Experiment on Tension Softening Behavior of Mortar—aggregate Interface ZHU Ya—chao．SONG Yu—pu。WANG Li—cheng (State Key Laboratory of Coastal and Offshore Engineering，Dalian University of Technology，Datian 116024，Liaoning，China) Abstract：Splitting tests and three point bending tests of mortar—aggregate composite specimens were carried Out．Based on the test results and modified J integral calculation method，tension softening curve model and its expression of mortar—aggregate interface were proposed．Analysis results indicate that the mortar matrix property and the roughness of aggregate interface have important effect on the mechanical properties of interface．The fracture energy of interface increases with the increasing of mortar matrix strength and aggregate surface roughness．The fracture interfaces of normal strength mortar specimens appear on the mortar joint interface，and the fracture interfaces of high strength mortar specimens appear on the mortar joint interface and mortar—aggregate interface． Key words：mortar—aggregate interface；splitting test；t