Research on Application Technology of Molybdenum Tailings Sand Concrete

Abstract

Molybdenum tailings sand is used as a fine aggregate to replace part of the construction sand, which can effectively solve the environmental pollution problems caused by the molybdenum tailings pond and has high utilization value. After tetsting the physical properties, chemical analysis, radioactivity and other indicators of molybdenum tailings sand, the results show that the molybdenum tailings sand basically meets the conditions of construction sand. By increasing the proportion of molybdenum tailings in concrete, the concrete performance will decrease in viscosity, slump loss and strength with the increase of the blending ratio. Therefore, the ratio of molybdenum tailings to substitute fine aggregate is between 40%-50%, should not exceed 60%. The problems of viscosity and strength of molybdenum tailings sand concrete still need to be solved through adjusting the concrete mix proportion or optimizing the admixture formula.