Influence Study on Performance of Mortar Prepared from Typical Tailings in Chengde Area by Polycarboxylate Superplasticizer
In order to solve the problems caused by tailings accumulation on the natural ecology of Chengde area,vanadium titanomagnetite tailings,molybdenum tailings,magnetite tailings and fluorite tailings from Chengde area were used to replace natural sand,and the influence of different dosages of polycarboxylate superplasticizer on the properties of tailings-based mortar was studied.The experimental results indicate that polycarboxylate superplasticizer can increase the apparent density of mortar.As the dosage increases,the water retention rate,flexural strength,and compressive strength of the four types of tailings-based mortar first increase and then decrease.The optimized vanadium titanium magnetite tailings mortar,molybdenum tailings mortar,magnetite tailings mortar,and fluorite tailings mortar have optimal mass ratios of 0.4%,0.4%,0.3%,and 0.2%,respectively,with the addition of polycarboxylate superplasticizer.
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