摘要
随着矿冶行业的快速发展,尾矿堆积量逐年增多,特别是铁尾矿已成为国内研究者关注的焦点。先用铁尾矿制备轻质高强陶粒,然后以该陶粒作为轻骨料制备陶粒混凝土。采用正交试验研究水灰比、减水剂用量、砂用量、增稠剂用量对陶粒混凝土抗压强度及陶粒上浮的影响。通过试验确定该铁尾矿基陶粒混凝土的最佳方案为水灰比0.25、减水剂用量0.5%、砂用量20%、增稠剂用量0.12%。最终制得28 d抗压强度为67.33 MPa、抗折强度为8.1 MPa、体积密度1 940 kg/m^(3)的高性能陶粒混凝土。研究中解决了轻骨料陶粒混凝土中陶粒上浮问题,实现了资源二次开发。
With the rapid development of the mining and metallurgy industry,the amount of tailings accumulation is increasing year by year.In particular,iron tailings have become the focus of domestic researchers.Firstly,light high-strength ceramsite was prepared from iron tailings.Then the ceramsites were used as light aggregate to prepare ceramsite concrete.The effect of water-cement ratio,water reducing agent,sand and thickener on compressive strength and floating of ceramsite were studied with orthogonal test.Through experiments,the best scheme of the iron tailings-based ceramsite concrete was that the water-cement ratio was 0.25,the dosage of water reducer was 0.5%,the dosage of sand was 20%and the dosage of thickener was 0.12%.Finally,the 28-day high-performance ceramsite concrete with compressive strength of 67.33 MPa,flexural strength of 8.1 MPa and density of 1940 kg/m^(3) was prepared.The floating problem of ceramsite in lightweight aggregate ceramsite concrete was solved.
作者
赵威
曹宝月
崔孝炜
韩硕
ZHAO Wei;CAO Baoyue;CUI Xiaowei;HAN Shuo(Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 72600,Shaanxi,China;Shaanxi Engineering Research Center for Mineral Resources Clean&Efficient Conversion and New Materials,Shangluo University,Shangluo 72600,Shaanxi,China)
出处
《矿产保护与利用》
2022年第6期89-93,共5页
Conservation and Utilization of Mineral Resources
基金
陕西省重点研发计划(2022GY-429)
陕西高校青年创新团队(20JCS062)
陕西省教育厅青年创新团队建设科研计划项目(21JP037)
商洛学院科学与研究基金项目(21CK02)。
关键词
铁尾矿
陶粒
轻骨料
陶粒混凝土
iron tailings
ceramsite
light aggregate
ceramsite concrete
