Abstract: The bending properties of polyvinyl alcohol-basalt fiber hybrid strain hardening cementitious composites (PB-SHCC) were studied in this paper. The water-binder ratio of cement matrix material was 0.25, the volume content of polyvinyl alcohol fiber in the hybrid system was 1.5% and 1.7% respectively, and then mixed with a certain volume content of basalt fiber to prepare polyvinyl alcohol-basalt fiber hybrid strain hardening cement matrix composites. A three-point bending test was carried out after standard curing for 28 d of the PB-SHCC. The test results show that PB-SHCC has the characteristics of bending strain hardening, and the bending deflection will be weakened compared with the single blending system, but the weakening degree is not great, and it still has high ductility; when the content of basalt fiber is 0.1%—0.3% and 0.8%—1.0%, it is beneficial to the improvement of initial crack strength and bending strength of the composites. In the evaluation of bending toughness, based on ASTM C1018 and JSCE-SF4 standards, the bending toughness index and bending toughness factor are improved and defined, which can succinctly and effectively evaluate the bending toughness of SHCC materials. The two indexes have a good agreement.
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