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Research on dry shrinkage of concrete

LIU Shu-hua,FANG Kun-he and ZHAO Yong-qiao et al.   

  • Online:2005-08-28 Published:2005-08-28

混凝土的干缩研究

刘数华1,方坤河1,赵永巧2,李正良3   

  1. 1.武汉大学水资源与水电工程科学国家重点实验室,武汉 430072;2.广州市水利局,广州 510640;3.湖南省水利水电勘测设计研究院,长沙410007

Abstract: In order to prevent the crack of concrete,many mass concrete takes dry shrinkage as an important index of crack resistance.In this paper,we analysis the influencing factors and measures of decreasing it.We can decrease the dry shrinkage of concrete by choosing cement,adding fly ash and fibre,increase content of aggregate and choose additions,which can improve crack resistance of concrete and can be used as reference in project.?

摘要: 为了防止混凝土发生裂缝,许多大体积混凝土在设计中提出抗裂要求,干缩是混凝土抗裂能力的重要指标。本文主要研究影响混凝土干缩的因素及降低混凝土干缩的措施。通过选择水泥品种、掺用粉煤灰和纤维、提高混凝土骨料含量、选择适当的外加剂等方式,能降低混凝土的干缩变形,从而提高混凝土抗裂性能,为工程实践提供参考。