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Damage characteristics of basalt fiber reinforced mortar under compression evaluated by acoustic emission

  • Yan Wang , Tingting Zhang , Li Zhou , Chao Yan , Na Wang , Jie Gu and Lijun Chen
Published/Copyright: March 26, 2019
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Abstract

Basalt fiber is a new type of high quality reinforced material used in composite materials. The performance of cement-based materials can be improved by adding basalt fiber, but its damage mechanism is more complicated. Acoustic emission technique can monitor the internal damage of materials. In this paper, the influence of the basalt fiber on the compressive failure process of mortar and the effect of the basalt fiber volume fraction variation on the acoustic emission characteristics in the damage process were investigated. The characteristic parameters of the acoustic emission signals of basalt fiber reinforced mortar with 4 different volume fractions under axial load were analyzed. Through analysis of the acoustic emission cumulative hit number, the acoustic emission cumulative energy, the RA value, the AF value and the b value, it could be found that the acoustic emission parameters of different damage stages were different, and the failure mode of the specimen could be identified according to the acoustic emission parameters. Besides, the addition of basalt fiber improved the rigidity and the ductility of the specimen.


*Correspondence Address, Associate Prof. Dr. Yan Wang, College of Civil and Transportation Engineering, Hohai University, Nanjing, 210024, P. R. China, E-mail:

Associate Prof. Dr. Yan Wang, born in 1980, started his studies on civil engineering at Hohai University, Nanjing, China in 2000. There he finished his PhD on the damage assessment and damage mechanism of concrete based on the acoustic emission technology in 2009 and stayed for teaching in the same year. He has been working on research at the post-doctoral mobile station of a water conservancy project, Hohai University from 2009 to the present. The focus of his research is on the damage study of concrete based on acoustic emission and ultrasonic technique.

MEng Tingting Zhang, born in 1993, studied civil engineering at Hohai University, Nanjing, China from 2016 until today. Her research focus is on the entire damage process of concrete under dynamic axial tension based on the acoustic emission fractal theory.

Meng Li Zhou, born in 1992, studied civil engineering at Hohai University, Nanjing, China, from 2015 up to now. Her research focus is on the damage characteristics of basalt fiber reinforced mortar under compression by acoustic emission characteristic parameters.

MEng Chao Yan, born in 1994, studied civil engineering at Hohai University, Nanjing, China, from 2017 until today. Her research focus is on the damage process of concrete based on the acoustic emission wavelet analysis technique.

MEng Na Wang, born in 1995, studied civil engineering at Hohai University, Nanjing, China, from 2017 until today. Her research focus is on the acoustic emission characteristics of fiber reinforced concrete in dynamic axial tension.

MEng Jie Gu, born in 1996, studied civil engineering at Hohai University, Nanjing, China, from 2018 until today. Her research focus is on the acoustic emission characteristics of mortar and concrete under dynamic axial tension.

MEng Lijun Chen, born in 1996, studied civil engineering at Hohai University, Nanjing, China, from 2018 until today. Her research focus is on the damage characteristics of basalt fiber reinforced mortar under compression by acoustic emission characteristic parameters.


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Published Online: 2019-03-26
Published in Print: 2019-04-04

© 2019, Carl Hanser Verlag, München

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