FUNDAMENTAL STUDY ON WATER TRANSFER IN PORTLAND CEMENT PASTE
FUNDAMENTAL STUDY ON WATER TRANSFER IN PORTLAND CEMENT PASTE
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波特兰水泥浆中水传输的基础研究
DOI：
10.3130/aijs.76.1737
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
N. Kishi
中科院分区：
文献类型：
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作者：
I. Maruyama;G. Igarashi;N. Kishi
对水泥石中的水迁移行为进行了评价。对于水传输的评价，随着时间的推移，试样的质量损失进行测量和玻尔兹曼的方法被应用到测量数据。同时，对硬化水泥石的解吸等温线进行了评价。利用名义含水量的扩散系数和解吸等温线，导出了硬化水泥浆体中水的化学势的水电导率。对9个不同孔隙率的硬化水泥浆体试件进行了测试，并利用这些数据提出了水电导率的预测模型。所提出的模型需要硬化水泥的性质，例如，20°C时的最大含水量、水蒸气BET表面积和含水量，以预测水传导率。模拟结果表明，水的电导率具有明显的温度依赖性。水电导率的温度依赖性的评估仍是未来的问题。
Water transfer behavior in hardened cement paste is evaluated. For evaluation of water transfer, mass loss of specimens over time is measured and Boltzmann's method is applied to measured data. At the same time, desorption isotherm of hardened cement paste is evaluated. Using the diffusion coefficient for nominal water content and desorption isotherm, water conductivity for chemical potential of water in hardened cement paste is derived. Nine hardened cement paste specimens, which have different porosity, are tested and using these data, predicting model of water conductivity is proposed. The proposed model needs the properties of hardened cement, such as, maximum water content at 20°C degree, water vapor BET surface area, and water content for predicting the water conductivity. According to the simulated results, the temperature dependency of water conductivity is obvious. Evaluation of temperature dependency of water conductivity is remained to be future issue.