Acoustic emission behavior of basalt textile reinforced concrete with different textile layers using the correlation analysis and cluster analysis methods

Abstract

With the increasing maturity of digital, efficient, and integrated textile technology and mechatronics integration technology, the textiles reinforced cement-based composite materials as the main load-bearing components have been widely used in the repair and reinforcement of building structures. However, the failure of textile reinforced concrete composites is usually the result of various coupled damage modes. There is an urgent need to real-time monitor the internal damage mechanism of textile reinforced concrete composites under relevant loads. In this paper, basalt textile reinforced concrete composites with different layers were prepared. The uniaxial tensile properties of different types of specimens were tested using a universal material testing machine and acoustic emission in-situ monitoring technology. The mechanical response process, tensile damage mechanism, strain-hardening characteristics, and multiple crack patterns of basalt textile reinforced concrete composites were clarified. The results showed that the single-layer basalt textile reinforced concrete exhibited a three-stage tensile behavior, namely the matrix-cracking stage, the textile load-bearing stage, and the failure stage. The tensile process of multi-layer basalt textiles reinforced concrete had four stages, namely the matrix-cracking stage, the multiple-crack stage, the textile load-bearing stage, and the failure stage. As the number of layers of basalt textile increased, the damage to composite materials mainly transitioned from matrix cracking to fiber breakage. The frequency of debonding between fibers and matrix increased, leading to an increase in shear cracks. The proportion of acoustic emission energy for fiber/matrix debonding and fiber breakage increased from 0 % to 34.6 %, which was more conducive for composite materials to absorb more energy.