Phosphate tailings modifying clay can be used to prepare phosphate tailings-clay filler.The compaction properties of 11 different mix proportions of phosphate tailings-clay were ana-lyzed by the compaction tests,determining the optimal content of phosphate tailings.The com-paction mechanism was analyzed from the perspective of the gradation.The results show that the fitting results of cubic functions are generally better than those of quadratic functions.With the increase of phosphorus tailings content,the maximum dry density of the mixture firstly increases and then decreases,and the optimal moisture content continues to decrease.The phosphate tail-ings and clay have the complementary characteristics of the particles,and the phosphate tailings-clay formed by 40％phosphate tailings and 60％clay can form a skeleton compact structure.
关键词
磷尾矿砂/黏土/击实曲线/最大干密度/最优含水率/级配机理
Key words
phosphate tailings/clay/compaction curve/maximum dry density/optimum water content/compaction mechanism
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