关键词: 自密实混凝土;自应力混凝土;养护条件;三联试模;自密实自应力钢管混凝土

Abstract: In the experiment, comparison was carried out on the mechanical properties of Model P 1, P2 and Model Z self-compacting and self-stressing concrete to study the influences of different mix proportions and curing conditions on self-stressing value .Also, comparison was carried out between the self-stressing value of concrete measured in the triple testing mold and the self-stressing value of self-compacting and self-stressing concrete-filled steel tube to study the feasibility of the new method .The results show the follows:the three types of concrete all have high self-stressing values , and have sound expansion effect and self-compacting .Under the same curing conditions , the self-stressing value of Model P concrete is higher than that of Model Z .Curing environment has a great influence on self-stressing value .It's practical and feasible to measure the self-stressing value of self-compacting and self-stressing concrete in triple testing mold .

Key words: self-compacting concrete;self-stressing concrete;curing condition;triple testing mold;self-compacting and self-stressing concrete-filled steel tube