低强度自密实混凝土收缩补偿研究  

Compensation of shrinkage for low-intensity self-compacting concrete

作　　者：孟志良[1,2] 孙建恒[2] 杨静[2] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045 [2]河北农业大学城乡建设学院,河北保定071001

出　　处：《混凝土》2009年第9期29-32,共4页Concrete

基　　金：河北省科技攻关项目(06213701D)

摘　　要：与同强度等级的普通混凝土对比,通过试验研究了低强度自密实混凝土收缩特点以及膨胀剂对自密实混凝土的收缩和抗压强度的影响。研究结果表明:低强度自密实混凝土收缩值高于同强度等级的普通混凝土;随着膨胀剂掺量的增加,自密实混凝土收缩值在降低,而其抗压强度先增加后降低,存在峰值。并对其机理进行了初步探讨。Compared with the same intensity level of ordinary concrete, the characteristics of shrinkage of low-intensity self-compacting concrete are analyzed, and the impact on shrinkage and compressive strength of self-compacting concrete caused by the expansive agent are studied. The value of shrinkage of low-intensity self-compacting concrete is higher than the same intensity level of ordinary concrete, the value of shrink- age of self-compacting concrete drops as the content of expansive agent increases, and its compressive strength increases at first, then its compressive strength decreases, the peak exists.And its mechanism was discussed.

关 键 词：低强度 自密实混凝土 抗压强度 膨胀剂 收缩 

分 类 号：TU528.53[建筑科学—建筑技术科学]