Investigation on the Effect of Gold Mine Tailings on the Properties of Micro-surface Mixture
In China,gold tailing sand is one of the major bulk solid wastes,and the majority of it has particles smaller than 0.3 mm,which is in excellent accord with the fine aggregate in the mineral grading of the micro-surface mix.This led us to conduct an experimental study on the durability of micro-surface mixtures containing gold tailings sand,primarily using load rutting,low-temperature semicircular bending(SCB),wet wheel abrasion,and rotating bottle abrasion tests on various gold tailings sand dosages,grading types,and emulsified asphalt types of micro-surface mixtures.Accord-ing to the test findings,adding gold tailing sand can improve the high-temperature performance,low-temperature performance,abrasion resistance and water stability of micro-surface mixtures.In com-parison to SBS and SBR-modified emulsified asphalt micro-surface treatment mixture,the water-based epoxy-modified emulsion has more excellent high-temperature and low-temperature performance,ab-rasion resistance,and water stability,and the low-temperature performance of SBS modified emulsi-fied asphalt is significantly lower than that of SBR modified emulsified asphalt.The suggested MS-3 type gradation was developed after careful study of the application environment of the micro-surface treatment mixture.
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