水泥增强粉煤灰浆液性能的实验研究  

Experimental Study of Enhancing Coal Ash Slurry Performance by Cement

作　　者：金永飞[1,2,3] 李海涛[1,3] 马蓉[1,3] 扬智文 赵君[4] 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]四川省煤炭产业集团公司,四川成都610074 [3]西部矿井开采及灾害防治教育部重点实验室,陕西西安710054 [4]大同煤矿集团有限责任公司,山西大同037003

出　　处：《煤矿安全》2014年第12期39-42,共4页Safety in Coal Mines

基　　金：国家重点基础研究发展计划(973计划)前期研究资助项目(2011CB411902);国家自然科学基金资助项目(51004081);2010年度新世纪优秀人才支持计划资助项目(NCET-10-0932);中国博士后科学基金资助项目(2014M552466)

摘　　要：为了满足井下充填堵漏对灌浆防灭火材料的强度要求,在水泥-粉煤灰灌浆防灭火材料的浆液固化实验基础上,结合X射线衍射分析手段,研究了水泥掺量对粉煤灰浆液的初凝时间及抗压强度的影响,并探讨了水泥增强粉煤灰浆液的强度形成机理。结果表明：当灰水比为14∶10,粉煤灰与水泥的添加比例为3∶1,井下胶凝固化剂的添加量为3%-5%时,粉煤灰水泥固化浆液快速初凝,3 d抗压强度为2.91 MPa,14 d抗压强度为7.50 MPa,28 d抗压强度为7.95MPa,完全可以满足井下充填堵漏的需要。水泥水化与粉煤灰水化过程协同相互作用,形成致密界面结构是水泥增强粉煤灰浆液的主要原因。In order to meet the strength requirements of underground filling and plugging in grouting fire prevention materials, on the basis of slurry curing experiment of cementcoal ash grouting fire prevention materials, combined with X - ray diffraction analysis method, we study the influence of cement content on coal ash slurry initial setting time and compressive strength, and explore the for- mation mechanism of enhancing strength of coal ash slurry by cement. The results show that coal ash cement curing slurry is fast initial setting as the gray water ratio of 14 ： 10, the coal ash and cement addition ratio of 3 ： 1, adding 3 to 5 percent of the underground gelling curing agent, compressive strength of 2.91 MPa for 3 d, compressive strength of 7.50 MPa for 14 d, compressive strength of 7.95 MPa for 28 d, which fully meets the needs of underground filling and plugging. Hydration process of cement is synergistic interaction with coal ash hydration, which is the main reason for cement to enhance coal ash slurry by a dense interface structure.

关 键 词：粉煤灰 水泥 灌浆 防灭火 抗压强度 固化 

分 类 号：TD752.2[矿业工程—矿井通风与安全]