风积沙混凝土早期自收缩变形的影响因素研究及数值模拟  

Experimental Study and Numerical Simulation on the Influence Factors of Self-shrinkage Deformation of Aeolian Sand Concrete

作　　者：李根峰[1] 申向东[1] 吴俊臣[1] 高波 LI Gen-feng;SHEN Xiang-dong;WU Jun-chen;GA0 Bo(Water Conservancy and Civil Engineering College,Inner Mongolia Agricultural University,Hohhot 010018,China)

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018

出　　处：《硅酸盐通报》2018年第3期996-1002,共7页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51569021;51769025);内蒙古博士研究生科研创新基金(B20171012918)

摘　　要：为探讨水胶比、砂率及粉煤灰掺量变化对风积沙混凝土早期自收缩变形的影响,采用非接触式混凝土收缩变形测定方法测定不同水胶比、不同砂率、不同粉煤灰掺量下的风积沙混凝土3 d内的自收缩,得到表征风积沙混凝土早期自收缩变形规律的收缩率曲线,并利用压汞法测定其微观结构。结果表明,水胶比变化对风积沙混凝土的早期自收缩变形的影响最大,砂率次之,粉煤灰最小;考虑了水胶比(砂率、粉煤灰)的影响下建立了风积沙混凝土自收缩变形规律的数值模型。In order to investigate the influence of water binder ratio,sand ratio and fly ash content on the autogenous shrinkage deformation of aeolian sand concrete at early age,the non-contact concrete shrinkage deformation method was used to determine the 3 d self-shrinkage of the aeolian sand concrete during different water-cement ratio,different sand rate and different fly ash content.Self-shrinkage deformation law of the shrinkage curve,and the use of mercury intrusion method to determine its microstructure.The results show that the change of water-cement ratio has the greatest influence on the early self-shrinkage deformation of aeolian sand concrete,followed by the sand rate and the fly ash.Considering the influence of water-cement ratio(sand ratio and fly ash)numerical model of self-shrinkage deformation law of sand-accumulating concrete.

关 键 词：风积沙混凝土 粉煤灰 水胶比 砂率 自收缩变形 

分 类 号：TU528[建筑科学—建筑技术科学]