Abstract：In order to study the influence of curing environment on the tensile properties of strain hardening cementitious composite,the uniaxial tensile test of SHCC under three kinds of curing environment,standard,indoor and outdoor,was carried out. The stress-strain curves and related parameters of materials under different conditions were obtained. Results showed that in the case of full maintenance all SHCC materials under different environmental conditions showed significant strain hardening characteristics with ultimate tensile strain reaching above 3% and had a excellent crack control capability that the average crack width corresponding to ultimate strain was well below 125 μm. Compared with the standard environment,the strength of SHCC under the indoor environment decreased,the hardening phenomenon was not obvious,but its toughness didn't decrease,crack width was below 60 μm. Although the outdoor environment was more complex,early fully curing enabled keeping SHCC stable performance that tensile strength and ductility had not decreased significantly and crack width was below 80 μm. Bilinear model introducing nominal initial crack strength and initial strain could well describe uniaxial tensile stress-strain relationship of SHCC under different environment. Research results show that the tensile properties of SHCC are relatively stable under suitable curing conditions,which can meet the requirements of engineering application.

Keyword：strain hardening cementitious composite(SHCC);strain hardening;stress-strain curve;cracks;simplified model;