Relationship of moisture content with temperature and relative humidity in concrete
Relationship of moisture content with temperature and relative humidity in concrete
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DOI：
10.1680/macr.12.00190
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发表时间：
2013-06-01
影响因子：
2.7
通讯作者：
Yuan, Yingshu
中科院分区：
文献类型：
--
作者：
Jiang, Jianhua;Yuan, Yingshu
混凝土中温度和水分的变化是由于自然环境中气候荷载的影响而产生的，因为它易于测量，所以相对湿度经常被用作反映水分含量的过渡指标。混凝土含水率与温湿度关系的确定对于准确预测钢筋混凝土结构的耐久性具有重要意义。在恒温条件下，对混凝土的相对湿度和含水率进行了同步测量。结果表明，孔隙水饱和度作为混凝土含水率的表征，随相对湿度的变化呈非线性变化，其变化受水灰比和温度的影响较大。最后，在试验结果和理论分析的基础上，建立了混凝土中孔隙水饱和度与温度、相对湿度之间的关系模型，并通过独立试验验证了模型的可行性。
Variations of temperature and moisture content in concrete arise as the effects of climate load in a natural environment; because it can be easily measured, relative humidity is often used as a transition index reflecting moisture content. Determination of the relationship between moisture content and temperature/humidity in concrete is of great significance in accurate prediction of the durability of reinforced concrete structures. Under constant temperature conditions, measurements of both relative humidity and moisture content in concrete are carried out synchronously. Results show that pore water saturation, considered as the characterisation of moisture content, changes non-linearly with relative humidity in concrete; the evolution is significantly influenced by the water-cement ratio and temperature. Finally, based on experimental results and theoretical analysis, a model of the relationship between pore water saturation, temperature and relative humidity in concrete is established, and its feasibility is verified through an independent test.