Hybrid polyethylene/polypropylene blended fiber-reinforced cement composite

作者：Silva E R^*; Coelho J F J; Bordado J C

来源：Journal of Composite Materials, 2013, 47(25): 3131-3142.

DOI：10.1177/0021998312462619

• Hybrid polyethylene
• polypropylene blended fiber
• fiber-reinforced mortar
• cement composite
• mechanical strength

This article reports the results of a study related to the reinforcement of mortar-based composites with newly developed polyethylene/polypropylene blended fibers. The study showed the hybrid fibers to have a mechanical/reinforcing effect in the cement-based matrix. Mechanical strengths improvements, as high as 402%, were obtained for composites with a fiber length of 24mm and a fiber volume fraction of 2.9%. The mechanical enhancement was associated with a strong mechanical interlocking between the fibers/cement matrix interfaces promoted by the fibers%26apos; surface ridges and fibrillation ability. Macro/microstructure and morphological observations showed a post-cracking ductility improvement of composites by the hybrid (bridge effect) fibers, also evidenced a multi-cracking mechanism.

• 出版日期2013-11