Experimental study on the bond behavior of polymer impregnated basalt textile embedded in a fine‐grained concrete

Abstract

The bond properties between polymer impregnated basalt textile and fine‐grained concrete were studied by pull‐out test considering the effects of bond length, impregnation polymer type, surface condition, and transverse yarn. The experimental results showed the pull‐out load increased with the bond length increasing, and the slight decrease in bond strength was attributed to the nonlinear distribution of bond stress. Owing to the high viscosity and good permeability of epoxy resin, the bond strength of epoxy resin‐impregnated textile was 238% and 592% higher than that of textile impregnated with acrylic emulsion and polyvinyl chloride, respectively. Moreover, the bond properties were improved significantly for impregnated textile with sticking sand or fiber by increasing the interfacial friction between textile and concrete, and the highest bond strength was obtained for yarn sticking sand with particle sizes of 0.09 ~ 0.18 mm. The transverse yarn of epoxy resin‐impregnated textile can generate an interlocking effect to concrete due to the semi‐rigid node, which increased the bond strength by 48.6%, whereas this did not happen for textile impregnated with flexible material. Furthermore, the anchorage lengths of textile were calculated, and the proposed simple bond slip model can be used to describe the pull‐out response of polymer impregnated basalt textile embedded in concrete.