Strain hardening behavior of lightweight hybrid polyvinyl alcohol (PVA) fiber reinforced cement composites |
| |
Authors: | Shaikh Faiz Uddin Ahmed Hirozo Mihashi |
| |
Affiliation: | (1) Department of Civil Engineering, Curtin University, Perth, Australia;(2) Tohoku Institute of Technology, Sendai, Japan |
| |
Abstract: | Experimental results on the strain hardening and multiple cracking behaviors of polyvinyl alcohol (PVA) fiber reinforced cementitious
composites under bending are reported in this paper. Different hybrid combinations of PVA fibers with different lengths and
volume fractions are considered to reinforce the mortar matrix. Among different hybrid combinations, the composite containing
2% thicker PVA fibers of 12 mm length and 1% thinner PVA fibers of 6 mm length and the composite containing 2% thicker PVA
fibers of 24 mm length and 1% thinner PVA fibers of 6 mm length showed the best performance in terms of highest ultimate load,
largest CMOD (crack mouth opening displacement) at peak load and multiple cracking behavior. The effects of four types of
light weight sands on the strain hardening and multiple cracking behavior of hybrid fiber composites are also evaluated in
this study. It has been observed that the ultimate load and CMOD at peak load for all light weight hybrid fiber composites
are almost the same irrespective of volume fractions of light weight sand. The composites containing finer light weight sands
exhibited higher ultimate load than those containing coarser light weight sands. It is also observed that the hybrid fiber
composite containing normal silica sand exhibited higher ultimate load than the composites with light weight sands. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|