黄金尾矿再生骨料的制备工艺优化与性能研究  

Optimization of preparation process and performance study of recycled aggregate from gold tailings

作　　者：常智杨 秦辉 周雪 杜庆洋[1] 徐会君[1] 乐红志[1] 刘东明 蒋洪振 CHANG Zhiyang

机构地区：[1]山东理工大学,山东淄博255000 [2]招远金都永和商品混凝土有限公司,山东招远265400 [3]山东金都建筑集团有限公司,山东招远265400

出　　处：《水泥》2025年第4期74-78,共5页Cement

基　　金：山东省自然科学基金(ZR2023QE219、ZR2022QB012);山东省科技型中小企业创新能力提升工程项目(2024TSGC0488、2023TSGC0968);招远市科技型中小企业与高校科研院所科技合作项目创新发展资金项目(2023cxfz06)。

摘　　要：针对黄金尾矿砂治理存在的成本高、资源化利用程度低、消纳量有限等问题,本文以黄金尾矿砂为主要原料,利用转盘成球技术制备黄金尾矿基再生骨料,研究了胶砂比及养护方式对黄金尾矿再生骨料粒径、吸水率、压碎值等性能的影响。结果表明,随着胶砂比的增大,再生骨料的吸水率和骨料压碎值下降;相较于蒸汽养护和标准养护,碳化养护后的再生骨料吸水率和压碎值均有所改善;优选的黄金尾矿再生骨料配比为:50%胶凝材料+50%黄金尾矿砂,碳化养护的再生骨料表观密度为2 650 kg/m~3,吸水率为3.2%,压碎指标为3.1%。此外,掺加10%黄金尾矿再生骨料混凝土的28 d抗压强度为52.5 MPa,稍低于基准混凝土的抗压强度,符合行业标准要求。In view of the problems such as high cost,low utilization rate and limited consumption for the treatment of gold tailings,this paper prepared gold tailings-based recycled aggregates by a turntable ball-forming technology using gold tailings as a raw material.The effects of binder-sand ratio and curing methods on the properties of gold tailings recycled aggregate were investigated,such as particle size,water absorption rate and crushing value.The results showed that water absorption rate and crushing value of recycled aggregate decreased with the increase of the binder-sand ratio.Compared with steam curing and standard curing,carbonization curing reduced the water absorption and crushing value of regenerated aggregate.The optimal composition of gold tailings-based recycled aggregate is 50%cementitious materials and 50%gold tailings.The optimal recycled aggregate had an apparent density of 2650 kg/m3,water absorption rate of 3.2%and crushing value of 3.1%.The 28 d compressive strength of concrete prepared with 10%recycled aggregate was 52.5 MPa,slightly lower than that of control concrete,which was in line with the standard requirements.

关 键 词：黄金尾矿 再生骨料 碳化养护 压碎指标 抗压强度 

分 类 号：TU528[建筑科学—建筑技术科学]