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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.

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