Experimental Study on Preparation of Paste Filling Materials from Power Plant Ash
Received date: 2020-12-08
Revised date: 2021-04-15
Online published: 2021-10-08
The application of power plant ash to mine goaf filling can enrich aggregate source and consume a large amount of solid waste，which has important social benefits.Power plant ash mainly refers to the ash produced by coal-fired power generation，which is a kind of bulk solid waste with the characteristics of large discharge and low utilization rate.The properties of ash produced by different types of power plants are very different，but they generally have certain pozzolanic activity and gelation characteristics，so they are good filling materials.In order to explore the influence of different ash residues on the strength of the filling body，fluidized bed bottom slag，fluidized bed fly ash and fly ash were mixed with different ratios as filling aggregate，ordinary silicate cement was used as cementation material，and add water to prepare paste material，then fluidity test and compressive strength test were carried out.The results show that：（1）The fluidized bed ash contains some cementation components，the fly ash has the water-reduction effect and the pozzolanic activity，both of which are good downhole filling materials.（2）When the moisture content of paste material exceeds its critical moisture content，the fluidity will be greatly improved，which will also lead to segregation and dehydration of the filling material，then reduce the strength of the filling body.（3） When the ratio of fluidized bed bottom slag，fluidized bed fly ash and fly ash is 6∶2∶1，cement content is 10%，the slurry concentration is 73%，the slump is 20 cm，and the 28 d strength of the filling body can reach 3.3 MPa.This ratio not only meets the requirements of slurry fluidity and backfill strength，but also greatly reduces the filling cost.（4）Taking the above ratio as the control group，the grading optimization experiment was carried out.The undisturbed bottom slag was broken，then the fine particles with different particle sizes and proportions were used as fine aggregate to replace the undisturbed bottom slag.When the particle size of the broken bottom slag less than or equal to 5 mm and the replacement rate is 10%~15%，the strength of filling body reaches 2.4 MPa on 7 day and 3.5 MPa on 28 day，and the strength is significantly improved.The experimental study of the paste filling material prepared from the ash residue of power plant with a specific ratio provides data support and theoretical basis for engineering application，which is of economic value and environmental protection significance.
Xin ZHAO , Long HAI , Bo XU , Tongjun CHENG . Experimental Study on Preparation of Paste Filling Materials from Power Plant Ash[J]. Gold Science and Technology, 2021 , 29(4) : 582 -592 . DOI: 10.11872/j.issn.1005-2518.2021.04.212
| null | Binay K D，Swapan K，Durjoy M，2009.Leaching of elements from coal fly ash：Assessment of its potential for use in filling abandoned coal mines［J］.Fuel，88（7）：1314-1323. |
| null | Cavusoglu I，Yilmaz E，Yilmaz A O，2021.Additivity effect on properties of cemented coal fly ash backfill containing waterreducing admixtures［J］.Construction and Building Ma-terials，267：1-15. |
| null | General Administration of Quality Supervision，Inspection and Quarantine of the People’ s Republic of China，2017.Fly Ash Used for Cement and Concrete：［S］.Beijing：Standards Press of China. |
| null | General Administration of Quality Supervision，Inspection and Quarantine of the People’s Republic of China，2008.Portland Cement for General Use：［S］.Beijing：Standards Press of China. |
| null | Hai Long，Liang Bing，Dai Hongfeng，al et，2014.Study on the reasonable and rational proportional mixture of dry-mixed mortar with fly ash for brick-making［J］.Journal of Safety and Environment，14（1）：157-159. |
| null | Kurniawati M，Azhari N J，Kadja G T，al et，2021.Conversion of coal fly ash into advanced crystalline materials［J］.IOP Conference Series：Earth and Environmental Science，623（1）：1-7. |
| null | Lankapati H M，Lathiya D R，Choudhary L，al et，2020.Mordenitea type zeolite from waste coal fly ash：Synthesis，characterization and its application as a sorbent in metal ions removal［J］.Chemistry Select，5（3）：1193-1198. |
| null | Li Chuanying，Qi Wenchao，2016.Cement macadam filling technology［J］.World Nonferrous Metals，（14）：73-75. |
| null | Li Shiquan，Yu Xufeng，Cao Lejuan，al et，2019.Research of mixing ratio and fly ash modification of magnesium phosphate cement［J］.Concrete，（4）：111-113. |
| null | Liang Songqiao，1980.The scientific experiment of using coal ash of power plant as underground filling material［J］.Coal Science and Technology，（9）：66. |
| null | Liu Mengru，Yang Yadong，Yang Sujie，al et，2020.Research on status of comprehensive utilization of fly ash［J/OL］.Industrial Minerals & Processing：1-5［2020-10-11］.. |
| null | Mehmet S K，2018.Pulverized fuel ash cement activated by nanographite［J］.ACI Materials Journal，2018，115（6）：803-812. |
| null | Michal A G，Daria J N，Mariusz D，2019.The influence of fluidized bed combustion fly ash on the phase composition and microstructure of cement paste［J］.Materials，12（17）：2838-2851. |
| null | Ministry of Housing and Urban-Rural Development of the People’s Republic of China，2019.Standard for Soil Test Method：［S］.Beijing：China Planning Press. |
| null | Ministry of Housing and Urban-Rural Development of the People’s Republic of China，2009.Construction Industry Standards of the People’s Republic of China：［S］.Beijing：Standards Press of China. |
| null | Ministry of Housing and Urban-Rural Development of the People’s Republic of China，2009.Standard for Test Method of Basic Properties of Construction Mortar：［S］.Beijing：China Architecture and Building Press. |
| null | Ministry of Transport of the People’s Republic of China，2005.Test Rules for Cement and Cement Concrete for Highway Engineering：［S］.Beijing：China Communications Press. |
| null | Radha R，Manish K J，2017.Effect of bottom ash at different ratios on hydraulic transportation of fly ash during mine fill［J］.Powder Technology，315：1-36. |
| null | Ren Fengyu，Zhai Huichao，Cao Jianli，al et，2012.Study on technology of mined out area filling in Paishanlou gold mine［J］.China Mining Magazine，21（1）：72-74. |
| null | Senecal P K，Felix L，2019.Diversity in transportation：Why a mix of propulsion technologies is the way forward for the future fleet［J］.Results in Engineering，4：1-11. |
| null | Tang Qian，2020.Research status of fly ash utilization and its application in environmental protection［J］.China Resources Comprehensive Utilization，38（5）：41-43. |
| null | Wang En，2016.Mineralogy properties comparison of PC fly ash and CFB fly ash［J］.Clean Coal Technology，22（4）：26-29. |
| null | Wang Yanan，Xiao Changlai，Liu Ting，al et，2013.Leaching experimental research on influence of ash storage field in a pow plant on groundwater fluorine pollution［J］.Water Saving Irrigation，（5）：40-42. |
| null | Wei Shaoqing，Tian Xiuqing，Yang Fengling，al et，2017.Effect of combustion on the characteristics of fly ash and slag in coal-fired power plants［J］.Clean Coal Technology，23（6）：83-89. |
| null | Ye Zhiyuan，Wang Qianqian，2020.Preparation and performance of aluminosilicate based solid waste cementitious materials［J］.Gold Science and Technology，28（5）：658-668. |
| null | Yi H，Luo Q M，Hu H L，2012.Situation analysis and countermeasures of China’s fly ash pollution prevention and control［J］.Procedia Environmental Sciences，16：690-696. |
| null | Yi Longsheng，Xu Yuanhong，Zhao Lihua，al et，2020.Influencing factors for setting time of fly ash-based geopolymer［J］.Mining and Metallurgical Engineering，40（1）：114-117. |
| null | Yin Shenghua，Liu Jiaming，Chen Wei，al et，2020.Optimization of the effect and formulation of different coarse aggregates on performance of the paste backfill condensation［J］.Chinese Journal of Engineering，42（7）：829-837. |
| null | Zhang Xiaofang，Chen Ruimin，Jian Wenbin，2020.Study on water conversion law and solidification mechanism of cement-slag-fly ash solidified silt［J/OL］.Journal of Engineering Geology：1-11.［2020-12-30］.. |
| null | Zhao Jihui，Wang Dongmin，Hui Fei，al et，2014.Characterization and resource utilization of circulating fluidized bed ash of gangue power plant［J］.China Mining Magazine，23（7）：133-138. |
| null | Zhou X X，Shen J M，2020.Micromorphology and microstructure of coal fly ash and furnace bottom slag based light-weight geopolymer［J］.Construction and Building Materials，242：1-10. |
| null | 海龙，梁冰，戴宏锋，等，2014.粉煤灰普通砌筑干混砂浆合理配比研究［J］.安全与环境学报，14（1）：157-159. |
| null | 李传迎，齐文超，2016.碎石胶结充填工艺［J］.世界有色金属，（14）：73-75. |
| null | 李十泉，于旭峰，操乐娟，等，2019.粉煤灰改性磷酸镁水泥试验研究［J］.混凝土，（4）：111-113. |
| null | 梁松乔，1980.用电厂粉煤灰作为井下充填材料的科学试验［J］.煤炭科学技术，（9）：66. |
| null | 刘梦茹，杨亚东，杨素洁，等，2020.粉煤灰资源综合利用现状研究［J/OL］.化工矿物与加工：1-5［2020-10-11］.. |
| null | 任凤玉，翟会超，曹建立，等，2012.排山楼金矿采空区充填技术研究［J］.中国矿业，21（1）：72-74. |
| null | 汤倩，2020.粉煤灰利用研究现状及其在环境保护中的应用［J］.中国资源综合利用，38（5）：41-43. |
| null | 王恩，2016.煤粉炉粉煤灰与循环流化床粉煤灰矿物学性质比较［J］.洁净煤技术，22（4）：26-29. |
| null | 王雅男，肖长来，刘婷，等，2013.某电厂灰渣贮灰场对地下水氟污染影响的淋滤实验研究［J］.节水灌溉，（5）：40-42. |
| null | 魏绍青，田秀青，杨凤玲，等，2017.燃烧工况对燃煤电厂灰渣理化特性的影响［J］.洁净煤技术，23（6）：83-89. |
| null | 叶智远，王倩倩，2020.铝硅酸盐固废胶凝材料制备及其性能［J］.黄金科学技术，28（5）：658-668. |
| null | 易龙生，许元洪，赵立华，等，2020.粉煤灰基地质聚合物凝结时间的影响因素研究［J］.矿冶工程，40（1）：114-117. |
| null | 尹升华，刘家明，陈威，等，2020.不同粗骨料对膏体凝结性能的影响及配比优化［J］.工程科学学报，42（7）：829-837. |
| null | 张小芳，陈瑞敏，简文彬，2020.水泥—矿渣—粉煤灰固化淤泥的水分转化规律及其固化机理研究［J/OL］.工程地质学报：1-11.［2020-12-30］.. |
| null | 赵计辉，王栋民，惠飞，等，2014.矸石电厂循环流化床灰渣特性分析及其资源化利用途径［J］.中国矿业，23（7）：133-138. |
| null | 中华人民共和国国家质量监督检查检疫总局，2017.用于水泥和混凝土中的粉煤灰：［S］.北京：中国标准出版社. |
| null | 中华人民共和国国家质量监督检查检疫总局，2008.通用硅酸盐水泥：［S］.北京：中国标准出版社. |
| null | 中华人民共和国交通部，2005.公路工程水泥及水泥混凝土试验规程：［S］.北京：人民交通出版社. |
| null | 中华人民共和国住房和城乡建设部，2009.建筑砂浆基本性能试验方法标准：［S］.北京：中国建筑工业出版社. |
| null | 中华人民共和国住房和城乡建设部，2009.中华人民共和国建筑工业行业标准：［S］.北京：中国标准出版社. |
| null | 中华人民共和国住房和城乡建设部，2019.土工试验方法标准：［S］.北京：中国计划出版社. |
/
| 〈 |
|
〉 |