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

Abstract 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 (le). (2) As le increases, peak pull-out load (Npmax) increases and then becomes unchanged. Appropriate le is within 15–18 mm. (3) As specimen ages, Npmax 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.