玻璃纤维改性煤基固废胶结充填材料性能研究
Study on properties of coal-based solid waste cemented filling material modified by glass fiber
程强强 1汪浩东 2阴琪翔 1赵明翔 1姚越 1闫宝峰3
作者信息
- 1. 江苏建筑职业技术学院 建筑建造学院,江苏 徐州 221116
- 2. 中国矿业大学 矿业工程学院,江苏 徐州 221116
- 3. 中建八局第三建设有限公司,江苏 徐州 210146
- 折叠
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200 mm,满足输送性能要求;抗压强度和抗拉强度随纤维长度的增大呈先增高后降低,随纤维掺量的增加而增高的变化规律;当玻璃纤维长度为6 mm、掺量为0.3%时,质量分数为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 optimization of cemented filling materials,the influence of glass fiber content,length and curing age on the conveying performance and mechanical properties of coal-based solid waste cemented material were studied.The reinforced mechanism of glass fiber was discussed.The experimental results show that:the slump of coal-based solid waste cemented material modified by glass fiber decreases with the increase of fiber length and content,all samples are greater than 200 mm which can meet the requirements of conveying performance.The change law of compressive strength and tensile strength is that with the increase of fiber length,it first increases and then decreases,and it increases with the increase of fiber content.When the glass fiber length is 6 mm and the content is 0.3%,the comprehensive performance of the coal-based solid waste cemented material with the mass fraction of 79%is the best.After hydration reaction of coal-based solid waste cemented material modified by glass fiber,the needle-like and mass-like products produced fill the small cracks in the material and adhere to the fiber surface.It can effectively improve the mechanical properties of materials.
关键词
煤基固废/玻璃纤维/胶结材料/充填材料/输送性能/力学性能/微观结构Key words
coal-based solid waste/glass fiber/cemented material/filling material/conveying performance/mechanical property/microstructure引用本文复制引用
基金项目
国家自然科学基金青年科学基金(52004105)
江苏省高等学校自然科学研究重大项目(22KJA560001)
江苏省第六期"333高层次人才"第三层次培养对象项目(20223-16-829号)
江苏建筑节能与建造技术协同创新中心产业发展基金(SJXTCY2305)
出版年
2024
NETL
NSTL
万方数据