EXPERIMENTAL STUDY ON BASIC MECHANICAL PROPERTIES OF POROUS LIGHTWEIGHT CONCRETE
Multi-ribbed composite wall structure is a new style of seismic structure, which is accordant to wall reform and energy saving policies of China. Multi- ribbed composite wall is the main bearing component, and a lot of porous lightweight concrete is used in this kind of structure. However, the mechanical properties of porous lightweight concrete have seldom been investigated domestically and abroad. In this paper, two groups of experiment were carried out to study the mechanical properties of porous lightweight concrete (PLC), including the cubic strength, prismatic strength, Youngs modulus, strain at peak stress, etc. PLC includes the autoclaved aerated concrete (AAC) and foamed concrete (FC). Comparison of the test results of this study and other correlative literatures were given. And the test and analysis showed the cubic strength, prismatic strength, Youngs modulus of ordinary concrete were decuple of those of PLC, but its strain at peak stress was 30％~40％ less than the latter. The basic mechanical performance and destroy shape of AAC were the same as those of FC. Before the peak stress, the stress-strain curve of PLC was approximately straight line. After the peak stress, the shape of the curve became very steep. After the residual strength, the slow descending curve appeared. From the process of the compressive failure, it can be seen that the material properties are strength-low, elastic and brittle.
Porous lightweight concrete (PLC) mechanical property experimental study stress-strain curve constitutive model
Y. Q. Xiong Q. F. Yao J. Sun
School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing, China
国际会议
上海
英文
1231-1238
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）