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材料导报  2025, Vol. 39 Issue (15): 24050076-11    https://doi.org/10.11896/cldb.24050076
  无机非金属及其复合材料 |
纳米Al2O3和钢纤维复合增强煤矸石-矿渣基地聚合物灌浆材料的性能研究
杨正辉1, 朱涛1, 张东生2, 杨秋宁1, 毛明杰1,*
1 宁夏大学土木与水利工程学院,银川 750021
2 鲁汶大学土木工程系,布鲁日 8200
Study on the Properties of Nano-Al2O3 and Steel Fiber Composite Reinforced Geopolymer Grouting Materials
YANG Zhenghui1, ZHU Tao1, ZHANG Dongsheng2, YANG Qiuning1, MAO Mingjie1,*
1 School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China
2 Department of Civil Engineering, KU Leuven, Bruges 8200, Belgium
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摘要 煤矸石是煤矿开采过程中产生的工业固废,将其作为胶凝材料用于制备地聚合物灌浆材料,是充分利用煤矸石,实现绿色低碳发展的有效途径。本工作将球磨后的煤矸石粉和矿渣作为胶凝材料,并利用不同体积掺量的钢纤维(SF)(0%、0.5%、1.0%、1.5%、2.0%)和纳米Al2O3(1.0%、2.0%、3.0%)对其改性,通过宏观力学与微观测试相结合的方法,研究了钢纤维单独作用和钢纤维在最优掺量下复合纳米Al2O3时地聚合物灌浆材料的力学性能、流变性能及微观分析。结果表明,单掺SF时最优掺量为1.5%,SF和纳米Al2O3复掺,掺量分别为1.5%、2.0%时,砂浆性能最优。28 d时,复掺试样抗压强度、抗折强度、断裂能分别增加了23.08%、34.55%、12.10%。塑性黏度和屈服应力均随着SF和纳米Al2O3掺量增加而增加。微观结构分析表明,相较于基准组,复掺后地聚合物产生了更多的C-(A)-S-H凝胶,孔隙率降低,基体变得更加致密。
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杨正辉
朱涛
张东生
杨秋宁
毛明杰
关键词:  煤矸石粉  钢纤维  纳米Al2O3  断裂性能  流变性能    
Abstract: Coal gangue, as an industrial solid waste generated in the process of coal mining, can be used as a gel material to prepare geopolymer grouting materials. It is an effective way to make full use of coal gangue and achieve green and low-carbon development. In this work, the crushed coal gangue powder by ball milling and slag were used as matrix, and modified by different volume fractions of steel fiber (SF) (0%, 0.5%, 1.0%, 1.5%, 2.0%) and nano-Al2O3(1.0%, 2.0%, 3.0%). Then the mechanical properties, rheological properties and microscopic analysis of the composite nano-Al2O3 grouting materials were studied by macroscopic mechanics and microscopic tests. The results show that the optimal volume fraction of SF alone is 1.5%, and the mortar performance is the best when SF and nano-Al2O3 are 1.5% and 2.0%, respectively. At 28 days, the compressive strength, flexural strength and fracture energy of the compound doping increased by 23.08%, 34.55% and 12.10%, respectively. Both the plastic viscosity and the yield stress increased with the increase of SF and nano-Al2O3 content. Microstructure analysis of the composite grouting material showed that more C-(A)-S-H gels were produced, the porosity was reduced, and the matrix became denser than the reference group.
Key words:  gangue powder    steel fiber    nano alumina    fracture property    rheological property
出版日期:  2025-08-10      发布日期:  2025-08-13
ZTFLH:  TU528  
基金资助: 国家自然科学基金(51568055);宁夏回族自治区重点研发计划(2021BEG02014)
通讯作者:  毛明杰,博士,宁夏大学土木与水利工程学院教授、博士研究生导师。现任宁夏大学土木与水利工程学院院长。目前主要从事土木工程结构、新型建筑材料等方面的研究工作。maomj@nxu.edu.cn   
作者简介:  杨正辉,宁夏大学硕士研究生,主要研究土木工程材料及固废资源再利用等。
引用本文:    
杨正辉, 朱涛, 张东生, 杨秋宁, 毛明杰. 纳米Al2O3和钢纤维复合增强煤矸石-矿渣基地聚合物灌浆材料的性能研究[J]. 材料导报, 2025, 39(15): 24050076-11.
YANG Zhenghui, ZHU Tao, ZHANG Dongsheng, YANG Qiuning, MAO Mingjie. Study on the Properties of Nano-Al2O3 and Steel Fiber Composite Reinforced Geopolymer Grouting Materials. Materials Reports, 2025, 39(15): 24050076-11.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.24050076  或          https://www.mater-rep.com/CN/Y2025/V39/I15/24050076
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