| 摘要: |
| 采用切片法测试经历不同潮湿养护历程的混凝土在垂直于表面不同深度处的回弹硬度、气体渗透系数和吸水性能.结果表明：早期潮湿养护时间与混凝土材料物理性能的空间均匀性密切相关，早期潮湿养护时间越短，混凝土物理性能空间非均匀性越明显，具体表现为表层混凝土的硬度（强度）越低，抗水、抗气体渗透性越差，且垂直于混凝土表面方向不同深度处的性能差异越显著. |
| 关键词: 混凝土物理性能 空间非均匀性 养护条件 钢筋保护层 渗透性 耐久性 |
| DOI：103969/j.issn.1007 9629201902015 |
| 分类号: |
| 基金项目:中国博士后科学基金项目（2016M592723）；国家自然科学基金资助项目（51302191）；云南省科技计划项目（2015DC010） |
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| Characterization of Spatial Non uniformity of Physical Properties for Concrete Materials |
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DANG Yudong1, MA Xiaojie2, DONG Chenhui1, XU Shilang3, LI Xincheng1
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1.Yunnan Key Laboratory of Building Structure and New Materials, Yunnan Institute of Building Research, Kunming 650223, China;2.Yunnan Quality Testing Station of Civil Engineering Co., Ltd., Kunming 650223, China;3.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
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| Abstract: |
| Rebound hardness, gas permeability coefficient and water absorption rate of cut slides of concrete under different wet curing history at different depths on its surface were tested. The results show that the time of early wet curing is closely related to the spatial uniformity of the physical properties of concrete materials. The shorter the time of early wet curing, the lower the hardness (strength) of the surface layer concrete, and the worse the resistance to water and gas permeability, and the more significant the gradient of difference at different depths along the vertical concrete surface. |
| Key words: physical property of concrete spatial non uniformity curing condition cover to reinforcement permeability durability |
