Influence of mineral composition of siliceous rock on its volume change
Influence of mineral composition of siliceous rock on its volume change
复制标题
DOI：
10.1016/j.conbuildmat.2015.07.071
复制
发表时间：
2015-09
影响因子：
7.4
通讯作者：
G. Igarashi;I. Maruyama;Y. Nishioka;H. Yoshida
中科院分区：
文献类型：
--
作者：
G. Igarashi;I. Maruyama;Y. Nishioka;H. Yoshida
研究了温度和湿度变化时骨料体积变化的预测方法。对日本不同地区市售的硅质岩集料进行了X射线衍射分析、热分析和体积变化实验。骨料的干燥收缩应变和热膨胀系数与其矿物组成和结合水含量有关。实验证实，干燥收缩与集料的绿泥石和结合水含量相关，热膨胀系数与集料的石英含量相关。
A method for predicting volume changes of aggregate during variations in humidity and temperature was studied. Siliceous rock aggregates commercially available in Japan were sampled from various regions and subjected to XRD (X-ray diffraction) analysis, thermal analysis, and volume change experiments. Drying shrinkage strain and the thermal expansion coefficient of the aggregates were found to be related to their mineral composition and bound water content. Experiments confirmed that drying shrinkage was correlated with the chlorite and bound water content of the aggregate, and that thermal expansion coefficients were correlated with the aggregate’s quartz content.