Title: Tensile Properties of Fiber Reinforced Cement Composite with Different PVA Fibers
Abstract:The tensile properties of cementitious composites reinforced by two kinds of polyvinyl alcohol(PVA) fibers respectively were studied.Experimental results show that the tensile performance of the compo...The tensile properties of cementitious composites reinforced by two kinds of polyvinyl alcohol(PVA) fibers respectively were studied.Experimental results show that the tensile performance of the composites may be greatly influenced by the dimension of the fibers.If the fiber with diameter of 39 μm is used,the strain hardening and multiple cracking performances can be obtained under tensile load and the ultimate tensile strain may achieve 2.6%.By contrast,if the PVA fiber with diameter of 15 μm is used,the composite behaves significant strain softening and single cracking model.The ultimate tensile strain achieved is only about 0.1%.The tensile strength of the composite reinforced with thinner fibers increases a little bit than that with the coarser one.The reasons of above different tensile performance are that the differences in crack bridging of the two composites.Crack bridging stress in composite is greatly controlled by the number of fibers bridging the cracks.Thinner fibers used in composite may lead less fibers to bridge the cracks due to fiber breakage.The fundamental requirement to enhance the crack bridging properties is to ensure fiber pull-out instead of breakage.Read More
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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Cited By Count: 2
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