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

• Pull-out tests on basalt fiber reinforced cementitious composites were conducted. • Bonding properties of BFRCC specimens with different fiber sizing were analyzed. • Micromorphology of BFRCC specimens from the pull-out tests was analyzed by SEM. 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 > cluster. (5) SEM analyses are consistent with the macro bonding performance of BFRCC. [ABSTRACT FROM AUTHOR]