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    王立成

    • 教授     博士生导师   硕士生导师
    • 性别:男
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:土木工程系
    • 学科:结构工程. 水工结构工程. 港口、海岸及近海工程
    • 办公地点:建设工程学部4号楼316
    • 联系方式:wanglich@dlut.edu.cn
    • 电子邮箱:wanglich@dlut.edu.cn

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    Capillary imbibition of water in discrete planar cracks

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    论文类型:期刊论文

    第一作者:Bao, Jiuwen

    通讯作者:Wang, LC (reprint author), Dalian Univ Technol, Fac Infrastruct Engn, Room 326,Fourth Test Bldg,2 Linggong Rd, Dalian 116024, Peoples R China.

    合写作者:Wang, Licheng

    发表时间:2017-08-15

    发表刊物:CONSTRUCTION AND BUILDING MATERIALS

    收录刊物:SCIE、EI

    卷号:146

    页面范围:381-392

    ISSN号:0950-0618

    关键字:Capillary imbibition; Discrete crack; Lucas-Washburn (L-W) equation; Cumulative water mass; Capillary rise height

    摘要:Knowledge of capillary imbibition of water in distributed microcracks within building materials plays a critical role in assessing and predicting the durability of reinforced concrete structures. This paper focuses on a comprehensive investigation of capillary imbibition of water in discrete planar cracks, involving both theoretical and experimental aspects. In view of dynamic capillary flow of liquid in discrete cracks, which is usually described by Lucas-Washburn (L-W) equation, the correlation between capillary rise height and crack width is theoretically established. A benchmark study to investigate capillary flow in a series of discrete granite cracks, artificially fabricated by means of ultrathin steel disc with various thicknesses, is reported, and this provides data to validate the theoretical model developed in the paper. The experimental results give out the measurement of discrete crack width with different sizes (23.64-240.38 mu m) as well as the mass of absorbed water obtained by the traditional gravimetric method. The average cumulative water mass of specimen generally increases with an increase of crack width for the ranges studied. Moreover, the cumulative water mass rapidly increases at the initial stage of water absorption test while at later stage the variation of absorbed water mass is relatively less. The analysis shows that the influence of gravity on the variation of capillary rise height is remarkable when crack width is beyond a critical range. Finally, the comparison between experimental and theoretical results indicates that the L-W capillary imbibition model of porous capillary tube after taking into account the gravity effect can be applied to the case of discrete crack with a certain range of width. (C) 2017 Elsevier Ltd. All rights reserved.