Experimental study on properties of pore water pressure affected to high-strength concrete under compressive stress
Xu Xiaofeng
Niu Xuechao
Liu Ju
Wang Hanjun
Liu Taifu
Abstract：In order to simulate mechanical performance of high-strength concrete under different working conditions,it was necessary to immerse the high strength concrete specimens in water for 48 h under different high pressures (1,2,3,4 MPa).That was how it has evolved into pore water pressure.This paper analyzed the comprehensive strength,elastic modulus,peak strain and volumetric strain of highstrength concrete under the function of pore water pressure while doing uniaxial compression tests on the TAW-3000 tester,and compared the results with the high-strength concrete without water pressure.It had been proved that the elasticity of stress-strain curves and stressstrain curves of high-strength concrete had been increased by roughly 10％.With every 1 MPa increase in pore water pressure,the average compression resistance intensity would be decreased by around 2.93％,and the rate for elastic modulus would decline by 2.96％.The faster the high-strength concrete cracks,the more obvious is its vulnerability to deterioration.What's more,as the pore water pressure increases,the resistance intensity as well as the resilient modulus demonstrate a trend of decline.
Keywords：high-strength concretepore water pressureuniaxial compressionmechanics property
Publication Date：2017-01-01
Pages：6( 37-42 )