摘要
为了研究固废磷石膏制备矿山充填材料的可行性,以磷石膏为骨料,添加电石渣、矿渣制备充填材料。采用单因素试验和正交试验法研究了电石渣质量分数、矿渣质量分数、物料质量分数,以及烘干温度对充填材料抗压强度的影响规律,并利用SEM分析了样品的微观形貌特征。试验结果表明:当磷石膏、电石渣、矿渣质量分数分别为65%、5%、30%时,物料质量分数为65%充填材料的强度及初始流动度满足充填要求。在130℃烘干8 h条件下,充填材料峰值强度最高。电石渣激发了矿渣活性,磷石膏与矿渣形成了针状钙矾石及水化铝酸钙和水化硅酸钙凝胶,增强了充填材料强度。
In order to study the feasibility at preparing mine filling materials with solid waste phosphogypsum,the filling material was prepared by adding calcium carbide slag and phosphogypsum slag,respectively,as aggregate.The single-factor experiment and orthogonal experiments were conducted to explore the effects of calcium carbide mass fraction,slag mass fraction,material mass fraction and drying temperature on the compressive strength of filling materials.The micromorphology characteristics of these samples was analyzed by SEM as well.The results show that when the mass fraction of phosphogypsum,calcium carbide and slag is 65%,5%and 30%,respectively,the strength and initial fluidity of the filling materials with the mass fraction of 65%is within the filling requirements.The strength of filling material peaked at 130℃for 8 hours.Calcium carbide slag stimulates the activity of slag.Phosphogypsum and slag form needle-like ettringite,calcium aluminate hydrate gel and calcium silicate hydrate gel,both of which enhances the strength of the filling materials.
作者
张淑坤
杨浩杰
付康
郭常宇
马旭辉
姚峰
肖浩冉
刘加军
ZHANG Shukun;YANG Haojie;FU Kang;GUO Changyu;MA Xuhui;YAO Feng;XIAO Haoran;LIU Jiajun(School of Urban and Civil Engineering,Zaozhuang University,Zaozhuang 277160,China;School of Civil Engineering,Liaoning Technical University,Fuxin 123000,China)
出处
《矿业安全与环保》
CAS
北大核心
2024年第1期133-139,共7页
Mining Safety & Environmental Protection
基金
山东省大学生创新训练项目(S202210904019)
辽宁省自然基金资助计划项目(2020-MS-302)。
关键词
磷石膏
电石渣
充填材料
宏观力学性能
微观结构
phosphogypsum
calcium carbide slag
filling material
macro-mechanical property
micro-structure
