【作者】 谢敬礼； 刘月妙； 周宏伟；

【Author】 XIE Jingli~(1,2),LIU Yuemiao~1,ZHOU Hongwei~2 (1.Beijing Research Institute of Uranium Geology,Beijing 100029,China; 2.School of mechanics and civil engineering,China University of Mining and Technology,Beijing 100083,China)

【机构】 核工业北京地质研究院； 中国矿业大学(北京)力学与建筑工程学院；

【摘要】 在高庙子膨润土GMZ001中添加不同比例的石英砂配制成混合材料,采用瞬变平面热源法测定不同压实密度、不同含水率的砂-膨润土混合材料的导热系数和热扩散系数,研究砂-膨润土混合物热传导特性的影响因素。试验结果表明,砂-膨润土混合物的导热系数和热扩散系数随着样品的压实密度、含水率的增大而显著增大;相比纯膨润土,石英砂作为添加剂可使混合材料的导热性能和热扩散性能明显提高,定量计算石英砂含量对混合物的导热系数和热扩散系数的影响程度;不同石英砂含量的砂-膨润土混合物的导热系数与其饱和度存在幂函数关系。更多还原

【Abstract】 The thermal properties of mixtures of Gaomiaozi bentonite(GMZ001) with a series content of sand under different dry densities and different water contents are studied by laboratory thermal test based on Transient Plane Source(TPS) method in order to investigate the influence factors.Test results show that the thermal conductivity and thermal diffusivity of the mixtures increase with the water content and dry density. Quartz sand can obviously enhance the thermal properties of the mixtures and the influence of the sand content is determined quantitively.A power function correlation between the thermal conductivity and saturation degree of the mixtures is also presented.更多还原