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《Bulletin of the Chinese Ceramic Society》 2017-02
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Effects of Chopped Basalt Fiber on Mechanical Properties and Microstructure of Slag Fly Ash Concrete

LI Jian;College of Architecture and Civil Engineering,Inner Mongolia University of Science & Technology;  
Compared with the polypropylene fiber( PPF),the effects of length( 12 mm,18 mm) and the volume fraction( 0. 50%,0. 10%,0. 20% and 0. 30%) of basalt fiber( BF) on workability,compressive strength,splitting tensile strength and flexural strength were analyzed. The microstructure and pore distribution were investigated via scanning electron microscope( SEM) and mercury intrusion porosimeter( MIP). The results show that adding BF significantly improves the splitting tensile strength and flexural strength,whereas the compressive strength shows no obvious increase. Furthermore,for the compressive,tensile and flexural strength of basalt fiber reinforced slag fly ash concrete,the optimum volume fraction of BF is 0. 20%,and the length of which is 18 mm. The result of SEM indicates that the bond strength between basalt fiber and matrix is good in a certain dosage. Moreover,the MIP results also showed basalt fiber can be able to reduce the proportion of harmful pores in concrete and optimize the pore distribution.
【Fund】: 内蒙古科技大学校级重点教学改革项目(JY201514)
【CateGory Index】: TU528
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