%0 Journal Article
%A SONG Li
%A LIU Lu-lu
%A GAO Yu-qin
%T Experimental Study on the Relative Elastic Deformation of Plastic Concrete with Low Strength
%D 2016
%R 10.11988/ckyyb.20141060
%J Journal of Yangtze River Scientific Research Institute
%P 147-150
%V 33
%N 3
%X In order to determine two endpoints (<i>P</i><sub>1</sub> and <i>P</i><sub>2</sub>) in the straight-line segment of stress-strain curve of plastic concrete, and to obtain the  elastic modulus, we  carried  out uniaxial compression test on 48 concrete specimens of four different mix proportions. Through analyzing typical stress-strain curve, we selected  approximated straight-line in the curve, and compared the  secant modulus with mean value of tangent modulus. On this  basis, we studied  how to determine <i>P</i><sub>1</sub> and <i>P</i><sub>2</sub>. The results show that  1) the  approximated straight-line segment appears at the ascent stage in the stress-strain curve of plastic concrete; 2) with given strength of plastic concrete less than 5 MPa, it is suitable to choose 60% and 80% of peak stress as the elastic modulus of <i>P</i><sub>1</sub> and <i>P</i><sub>2</sub>, respectively, otherwise, further study is required. Finally, the research offers a method for determining the values of material performance of plastic concrete with low strength.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20141060