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硅酸盐通报 ›› 2018, Vol. 37 ›› Issue (3): 996-1002.

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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

李根峰;申向东;吴俊臣;高波   

  1. 内蒙古农业大学水利与土木建筑工程学院,呼和浩特,010018
  • 出版日期:2018-03-15 发布日期:2021-01-18
  • 基金资助:
    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)

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

LI Gen-feng;SHEN Xiang-dong;WU Jun-chen;GAO Bo   

  • Online:2018-03-15 Published:2021-01-18

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3d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.

关键词: 风积沙混凝土;粉煤灰;水胶比;砂率;自收缩变形

Abstract: 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.

Key words: aeolian sand concrete;fly ash;water-cement ratio;sand ratio;self-shrinkage deformation

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