聚羧酸减水剂对承德地区典型尾矿制备砂浆性能影响研究  

Influence Study on Performance of Mortar Prepared from Typical Tailings in Chengde Area by Polycarboxylate Superplasticizer

作　　者：杨韶波 卢云鹤 吴小文[1] 吴烽瑞 房明浩[1] YANG Shaobo;LU Yunhe;WU Xiaowen;WU Fengrui;FANG Minghao(China University of Geosciences Beijing,Beijing 100083,China)

机构地区：[1]中国地质大学(北京),北京100083

出　　处：《北京工业职业技术学院学报》2025年第1期27-32,共6页Journal of Beijing Polytechnic College

基　　金：2021年度国家重点研发计划“固废资源化”重点专项课题(2021YFC1910603)。

摘　　要：为解决尾矿堆积对承德地区自然生态带来的问题,使用承德地区的钒钛磁铁矿尾矿、钼尾矿、磁铁矿尾矿和萤石尾矿替代天然砂,探讨不同掺量的聚羧酸减水剂对尾矿基砂浆性能的影响规律。试验结果表明:聚羧酸减水剂可以增加砂浆的表观密度;随着掺量的增加,4种尾矿基砂浆的保水率、抗折强度和抗压强度均先升后降;优化后的钒钛磁铁矿尾矿砂浆、钼尾矿砂浆、磁铁矿尾矿砂浆、萤石尾矿砂浆,掺加减水剂最佳质量比分别为0.4%、0.4%、0.3%、0.2%。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.

关 键 词：聚羧酸减水剂 砂浆 尾矿 保水率 力学性能 

分 类 号：X705[环境科学与工程—环境工程]