Investigation on Adhesion of Synthetic Fibers to Cement Matriz Using Pull-out Test
The application of fibers to reinforce cementitious materials is an ancient subject. Many studies have been performed to specify suitable reinforcing fibers for cement based materials. Now, it is well known that synthetic fibers improve tensile and fiexural strengths and toughness of cementitious composites. Bonding of fibers to cement matrix is one of the most important factors that affect performance of cementitious composites. Adhesion energy between fiber and cement matrix can be attributed to interfacial interaction and interlocking of fiber and cement matrix. Pullout test is usually used to determine fiber/cement bonding strength. In present article adhesion of polymeric fibers to cement matrix was investigated using Pullout test method. The XRD and microscopic analysis were used to characterize fiber/cement interfacial interactions. Surface free energy of fibers has been measured, and then thermodynamic work of adhesion was calculated. Fibers were also characterized using optical microscopy before and after pullout. It was found that polypropylene fibers performed better than other fibers due to their damping stress effect.
adhesion fiber-cement bonding interfacial interactions pullout test contact angle
Masoud Jamshidi Hamidreza Pakravan Masoud Latifi
Department of Concrete Technology, Building and Housing Research Center(BHRC), Tehran, Iran Department of Textile Engineering, Amirkabir University, Tehran, Iran
国际会议
6th Asian Symposium on Polymers in Concrete(第六届亚洲聚合物混凝土国际会议)
上海
英文
101-106
2009-10-29（万方平台首次上网日期，不代表论文的发表时间）