Experimental study on the interfacial bond between short cut basalt fiber bundles and cement matrix

Bonding performance of basalt fiber reinforced cementitious composites (BFRCC) was studied through analyses on pull-out tests and scanning electron microscope (SEM) results. It is concluded that: (1) The rupture failure occurred for dispersed and flexible-type fibers, the pull-out failure controlled cluster-type fibers, and failure modes of alkali-resistant fibers are related to their embedded lengths (l(e)). (2) As l(e) increases, peak pull-out load (N-pmax) increases and then becomes unchanged. Appropriate le is within 15-18 mm. (3) As specimen ages, N-pmax first increases and starts to decrease at 7-day. (4) Comparisons of bonding strength among different fiber types: dispersed > flexible > alkali-resistant > cl uster. (5) SEM analyses are consistent with the macro bonding performance of BFRCC. (C) 2020 Elsevier Ltd. All rights reserved.