基于正交试验的新型隔热砂浆掺量配比研究
Research on mixing proportion of new thermal insulation mortar based on orthogonal experiment
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摘要: 以粉煤灰陶粒、玄武岩纤维、膨胀蛭石作为掺量制备了适应于矿井围岩隔热的水泥砂浆试件，通过正交试验来确定隔热砂浆中3种掺量的最优配比，并对最优配比下的隔热砂浆进行抗压强度和导热系数测定。实验结果显示：当粉煤灰陶粒掺量为96%，玄武岩纤维掺量为16%，膨胀蛭石掺量为16%时，此时试件性能最为优越。Abstract: This paper proposes a method to control the heat transfer from the surrounding rock to the roadway, that is, a new type of thermal insulation mortar is laid on the wall of the roadway surrounding rock, and the optimal proportion of three additives in the thermal insulation mortar is determined through orthogonal experiments, and the basic experimental measurement of the thermal insulation mortar under the optimal proportion is carried out. The experimental results show that with the increase of the three admixtures, the thermal conductivity of thermal insulation mortar decreases significantly, and the compressive strength decreases. When the content of fly ash ceramsite is 96%, the content of basalt fiber is 16%, and the content of expanded vermiculite is 16%, the performance of the specimen is the best.
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