全级配混凝土干缩变形性能研究

长江科学院院报 ›› 2010, Vol. 27 ›› Issue (2): 64-67.

全级配混凝土干缩变形性能研究

郑丹, 李文伟, 陈文耀

出版日期:2010-02-01 发布日期:2012-07-05

Research on Fullgrade Concrete Shrinkage Deformation

ZHENG Dan, LI Wen-Wei, CHEN Wen-Yao

Online:2010-02-01 Published:2012-07-05

摘要/Abstract

摘要： 混凝土裂缝会对结构的稳定产生不利因素，为此进行了全级配和湿筛混凝土的干缩变形试验。通过分析混凝土的干缩机理，在弹性力学理论基础上建立了考虑骨料粒径和含量的混凝土干缩模型，分析了混凝土的干缩变形与骨料及水泥浆体弹性模量之间的关系。同时通过分析试件尺寸对混凝土干缩性能的影响，对比研究了全级配与湿筛混凝土干缩变形随龄期的变化规律，结果显示模型计算数据与试验数据吻合良好。研究表明，全级配与湿筛混凝土干缩变形比值随龄期增加而逐渐增大，180d龄期时的比值约为0.29左右。

Abstract: Both shrinkage experiments of full-grade concrete and sieved concrete were conducted. The shrinkage mechanism of concrete was analyzed and a model based on the theory of elastic mechanics was built which can consider the influence of aggregate size and content. The relationships among concrete shrinkage deformation and elastic modulus of aggregate and cement pasted were analyzed, and the relation between the shrinkage deformation of full-grade and sieved concrete and experimental age was analyzed considering the influence of specimen size to concrete shrinkage. It is shown that the ratios of full-grade concrete to sieved concrete shrinkage increase with age increase, and the ratio at 180 age is about 0.29.

郑丹, 李文伟, 陈文耀. 全级配混凝土干缩变形性能研究[J]. 长江科学院院报, 2010, 27(2): 64-67.

ZHENG Dan, LI Wen-Wei, CHEN Wen-Yao. Research on Fullgrade Concrete Shrinkage Deformation[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2010, 27(2): 64-67.