摘要
为了研究非均匀性对沥青混凝土抗拉特性的影响,设计了一种测定间接抗拉强度的试验装置.试件设计成圆环形,对试件内壁施加均布径向水压力使其拉伸变形和破坏.在水压力作用下,试件沿半径方向在试件内壁产生相同拉应力,在拉应力作用下,根据试样本身的不均匀性会在试件最薄弱处产生破裂面.试验结果表明:数据稳定可靠,散布小,重复性好,所提供的试验装置简单而有效.
A new indirect tensile strength tester is developed for evaluating the influence of non-homo- geneity for indirect tensile strength of asphalt concrete. Water pressure is imposed on the inside of the ring specimen to cause tensile failure. As water pressure is imposed,uniform radial tensil stress is pro- duced along the inner side of ring specimen and crack will be appeared in the weakest direction of of ring specimen. The tester is made up with light-weight material to fit the need of Computrized Tomo- graphy scanning and there is no need to change the scanning surface during the loading and scanning process. The test results show that the tester is reliable and easy to operate. With the aid of Comput- rized Tomography, the tester can be used to evaluate the influence of inner structure to mechnical propertities of asphatl concrete.
出处
《武汉理工大学学报（交通科学与工程版）》
2010年第2期310-313,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
教育部科学技术研究重点项目(批准号:208145)
西安市工业应用技术研发项目(批准号:CXY08012)
陕西省教育厅专项科研计划项目(08JK358)资助
关键词
沥青混凝土
抗拉强度
设备
非均匀性
CT
asphalt concrete
tensile strength
tester
non-homogeneous
computrized tomography
