Calculation of compressive strength of ultra-high performance concrete under multiple factors
It aims to evaluate the effect of different water-binder ratios and steel fiber volume fractions on the compressive strength of ultra-high performance concrete(UHPC).Select three water-binder ratios(0.16,0.18,0.2)and four steel fiber volume fraction(0,1%,2%,3%)as variable quantity for these experiments.The uniaxial compressive strength of UHPC specimens in three geometries(cube,prism,cylinder)were measured.The results show that the increase of UHPC compressive strength is directly proportional to the increase of steel fiber volume fraction and inversely proportional to the increase of water-binder ratio,and the change trend gradually slows down with the growth of variables.Suggested values of compressive strength conversion coefficients for UHPC specimens with different shapes and sizes were proposed.The calculation formula of prismatic compressive strength and cylinder compressive strength are established.
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