Experimental study on the tensile and compressive properties of domestic PVA/PE fibers hybrid reinforced ultra high toughness cementitious composite
In this paper,a series of tests were conducted to evaluate the influences of fly ash content,domestic PVA/PE fibers single-addition and their mixing ratio on the compressive and tensile properties of ultra high toughness cementitious composite(UHTCC).The experimental results showed that single doped with PVA/PE fibers or mixed use all could effectively provide UHTCC with an ultimate tensile strain of more than 3%.Under the same PVA/PE fibers'mixing ratio(except for PVA single-addi-tion),the compressive strength of UHTCC showed a gradually decreasing trend as the amount of fly ash increased,there was an obvious positive hybrid effect on the ultimate tensile strain of UHTCC when PVA and PE fibers were used together.The ultimate tensile strain of UHTCC with hybrid fibers was greater than the ultimate tensile strain calculated by linear interpolation of PVA-UHTCC and PE-UHTCC.The crack width of PVA-UHTCC was significantly greater than PE-UHTCC and the crack width of hy-brid fibers UHTCC decreased with the increase of PE fiber content.
万方数据
维普
