自密实自应力混凝土力学性能及自应力值测定试验研究

试验通过P1、P2型与Z型自密实自应力混凝土进行力学性能比较,研究不同配合比及不同养护条件对自应力值的影响;对三联试模测定的混凝土自应力值和自密实自应力钢管混凝土测定的自应力值进行比较,研究新方法的可行性.结果表明:三种混凝土均能产生较高自应力值,都具有良好的膨胀效果和自密实特点;在同养护条件下,P型混凝土自应力值均比Z型高;其中养护环境对自应力值有较大影响;用三联试模来测定自密实自应力混凝土自应力值是切实可行的.

Mechanical Performance and Self-stressing Value Determination of Self-compacting and Self-stressing Concrete

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 .