李景浩,何小波,胡少伟,等. 现代混凝土自收缩及其调控研究进展[J]. 水利水运工程学报,2023(2):150-161. doi: 10.12170/20220111001
引用本文: 李景浩,何小波,胡少伟,等. 现代混凝土自收缩及其调控研究进展[J]. 水利水运工程学报,2023(2):150-161. doi: 10.12170/20220111001
(LI Jinghao, HE Xiaobo, HU Shaowei, et al. Advances in autogenous shrinkage and its regulation of modern concrete[J]. Hydro-Science and Engineering, 2023(2): 150-161. (in Chinese)). doi: 10.12170/20220111001
Citation: (LI Jinghao, HE Xiaobo, HU Shaowei, et al. Advances in autogenous shrinkage and its regulation of modern concrete[J]. Hydro-Science and Engineering, 2023(2): 150-161. (in Chinese)). doi: 10.12170/20220111001

现代混凝土自收缩及其调控研究进展

Advances in autogenous shrinkage and its regulation of modern concrete

  • 摘要: 混凝土是使用最为广泛的建筑材料。现代混凝土为实现高性能而趋于采用低水胶比和高含量胶凝材料,使得混凝土自收缩显著增大,在约束条件下往往形成较大的拉应力,因此现代混凝土结构开裂问题愈发严重,显著降低了混凝土的耐久性,缩短服役期,这类问题在水工大体积及薄壁混凝土结构中尤为突出。对近些年国内外混凝土自收缩及其调控研究进行了文献综述,比较分析了自收缩“零点”与变形测量方法及装置、自收缩预测模型和自收缩调控措施3个方面的最新成果和进展,总结了现有研究存在的不足,并提出了一些关键问题的未来研究方向,为实际工程裂缝控制和自收缩研究提供参考。

     

    Abstract: Concrete is the most widely-used construction materials, and modern concrete is produced with a low water to binder ratio and high binder materials content to obtain high performances, leading to a significant increase in autogenous shrinkage (AS), thus triggering a large tensile stress under restraint and further a serious early-age cracking, which deteriorates the concrete durability, shortens the service life and causes an incalculable loss, especially in hydraulic mass concrete and thin-walled concrete structures. This paper reviews the literatures on the latest achievements and progress at home and abroad for AS and relevant regulations in recent years, summarizing and comparatively analyzing the latest achievements and progress in methods and devices for AS “time-zero” and deformation measurement, AS prediction models and AS regulation techniques, pointing out the flaws in the current research and giving further research direction on some key problems, and setting a reference for practical engineering and further AS studies.

     

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