The influence of curing age and mix proportion on the uniaxial compressive properties of green high-performance fibre-reinforced cementitious composites

Abstract

The influences of curing age and mix proportions on the uniaxial compressive properties of green high performance fibre-reinforced cementitious composites (GHPFRCC) in terms of the compressive strength and elastic modulus were examined, with constitutive relationships thus presented based upon the static compressive elastic modulus test. Sixteen groups of GHPFRCC specimens were prepared according to the orthogonal experiment method, with two curing periods employed (7 days, 28 days). Experimental results indicate that curing age has a significant influence on uniaxial compressive strength and elastic modulus; with the majority of early compressive strength and elastic modulus values reaching more than 50% of the final measured rates. Water–binder ratio was found to have the greatest influence on compressive strength and elastic modulus, with the mean compressive strength of GHPFRCC almost equal to that of concrete, whereas the elastic modulus of GHPFRCC is typically lower than that of concrete.