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

• Published in: Construction & building materials 2020-09, Vol.256, p.119353, Article 119353
• Main Authors: Cui, Sheng'ai, Xu, Xuefeng, Yan, Xianjiao, Chen, Zhao, Hu, ChengYan, Liu, ZuoLei
• Format: Article
• Language: English
• Subjects: Basalt fiber; Bonding strength; Fiber sizing agent; Pull-out failure; Pull-out test; Rupture failure; SEM
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2020.119353

•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 (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.