| 摘要: |
| 测定了3个强度等级混凝土在不同水化进程时的表面系数，并基于水泥水化理论提出了考虑水化进程的混凝土表面系数理论模型.结果表明：混凝土的表面系数与其表面湿度状态密切相关，当其处于湿度饱和期时，表面系数仅受环境因素影响；当其处于湿度下降期时，表面系数与混凝土的强度等级和水化程度有关；混凝土表面系数理论模型充分考虑了混凝土表面湿度状态和水化程度的影响，可以准确计算不同条件下的表面系数. |
| 关键词: 混凝土 表面系数 水化程度 失水量 表面湿度 |
| DOI：10.3969/j.issn.1007-9629.2022.06.012 |
| 分类号:TU528.01 |
| 基金项目:国家自然科学基金资助项目（51908550） |
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| Experimental and Theoretical Study on Concrete Surface Factor Considering Hydration Process |
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WANG Jiahe1,2, XIE Yongjiang1,2, FENG Zhongwei1,2, ZHONG Xinhua1,2
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1.Railway Engineering Research Institution， China Academy of Railway Sciences Corporation Limited， Beijing 100081， China;2.State Key Laboratory for Track Technology of High-speed Railway， China Academy of Railway Sciences Corporation Limited， Beijing 100081， China
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| Abstract: |
| The surface factor of concrete of three strength grades in different hydration processes was measured. Based on cement hydration theory， a theoretical model of concrete surface factor considering hydration process was proposed. The results show that the surface factor of concrete is closely related to its surface humidity state. When it is in the moisture saturation period， its surface factor is only affected by environmental factors. When it is in the moisture decline period， its surface factor is related to the strength grade and hydration degree of concrete. In the surface factor calculation model the influence of concrete surface moisture state and hydration progress has been fully considered， and the surface factor under different conditions can be accurately calculated. |
| Key words: concrete surface factor degree of hydration water loss surface humidity |
