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随着矿井开采深度的增加,高温热害问题日益突出,通过正交试验的方法,以陶粒、玻化微珠和粉煤灰掺量作为实验变量,研制出一种新型隔热材料,其导热系数仅为普通混凝土的1/8;对各实验变量对于材料的表观密度、导热系数、抗压、抗拉、抗折强度的影响进行了研究,通过功效系数法进行分析,最终得出新型隔热材料的最佳掺量配比为:陶粒掺量为粗骨料的40%、玻化微珠掺量为细骨料的60%、粉煤灰掺量为胶凝剂的20%。试验结果表明,新型隔热材料施工工艺简单,成本低廉,可以满足深井高温巷道隔热要求,值得大力推广和使用。
With the increase of mining depth, the problem of high temperature and heat damage becomes more and more prominent. Through orthogonal experiment, a new type of thermal insulation material is developed by taking the content of ceramsite, vitrified beads and fly ash as experimental variables The thermal conductivity is only 1/8 that of ordinary concrete. The effects of experimental variables on the apparent density, thermal conductivity, compressive strength, tensile strength and flexural strength of the materials were studied. The coefficient of effect method was used to analyze the results. The best proportion of new insulation materials for the ratio: Ceramsite content of 40% of the coarse aggregate, glass beads mixed content of 60% of the fine aggregate, fly ash dosage of gelling agent 20 %. The test results show that the new insulation material has the advantages of simple construction process and low cost, which can meet the requirements of heat insulation for deep well and high temperature roadway, and is worth promoting and using.