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程强强, 汪浩东, 阴琪翔, 赵明翔, 姚越, 闫宝峰. 玻璃纤维改性煤基固废胶结充填材料性能研究[J]. 矿业安全与环保.
引用本文: 程强强, 汪浩东, 阴琪翔, 赵明翔, 姚越, 闫宝峰. 玻璃纤维改性煤基固废胶结充填材料性能研究[J]. 矿业安全与环保.
CHENG Qiangqiang, WANG Haodong, YIN Qixiang, ZHAO Mingxiang, YAO Yue, YAN Baofeng. Experimental study on properties of coal based solid waste cemented material improved by glass fiber[J]. Mining Safety & Environmental Protection.
Citation: CHENG Qiangqiang, WANG Haodong, YIN Qixiang, ZHAO Mingxiang, YAO Yue, YAN Baofeng. Experimental study on properties of coal based solid waste cemented material improved by glass fiber[J]. Mining Safety & Environmental Protection.

玻璃纤维改性煤基固废胶结充填材料性能研究

Experimental study on properties of coal based solid waste cemented material improved by glass fiber

  • 摘要: 基于煤矸石、粉煤灰等煤基固废再生资源利用和胶结充填材料性能优化问题,研究了玻璃纤维掺量、长度和养护龄期对煤基固废胶结材料输送性能和力学性能的影响规律,探讨了玻璃纤维增强机理。实验结果表明:玻璃纤维改性煤基固废胶结材料坍落度随纤维长度和掺量的增大而减小,但均大于200mm,满足输送性能要求;抗压强度和抗拉强度随纤维长度的增加呈先增加后降低规律、随纤维掺量的增加而增加规律;当玻璃纤维长度为6mm、掺量为0.3%时,质量浓度为79%的煤基固废胶结材料的综合性能最佳;玻璃纤维改性煤基固废胶结材料水化反应后,生成的针状和团状产物填充了材料细小裂隙且附着于纤维表面,能够有效提高材料的力学性能。

     

    Abstract: Based on the utilization of coal based solid waste renewable resources such as coal gangue and fly ash and the optimization of the performance of cemented backfill material. The influence of glass fiber content, length and curing age on the transportation performance and mechanical properties of coal based solid waste cemented material and its strength mechanism were studied by means of laboratory tests. The results show that:the slump of coal based solid waste cemented material improved by glass fiber decreases with the increase of fiber length and content, all samples are greater than 200mm which can meet the requirements of transportation performance. The compressive strength and tensile strength increase first and then decrease with the increase of fiber length, and increase with the increase of fiber content; when the concentration of coal based solid waste cemented material is 79%, the optimum scheme of glass fiber is 6mm in length and 0.3% in content. The needle like and mass like products produced by the appropriate length of glass fiber can effectively improve the material strength by filling small cracks and adhering to the fiber surface. The cemented filling material improved by glass fiber can realize the recycling of coal based solid waste, and it is helpful to energy saving and emission reduction as well as to achieve the goal of "double carbon", and it has good engineering application value.

     

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