纳米SiO2和聚丙烯纤维对煤矸石二灰混合料改性试验研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (5): 1669-1676.

纳米SiO₂和聚丙烯纤维对煤矸石二灰混合料改性试验研究

储安健^1,2,3, 李英明^1,2,3, 黄顺杰^1,2,3, 陈莞尔⁴

1.安徽理工大学深部煤矿采动响应与灾害防控国家重点实验室,淮南 232001;
2.安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,淮南 232001;
3.安徽理工大学矿业工程学院,淮南 232001;
4.安徽理工大学安全科学与工程学院,淮南 232001

收稿日期:2021-12-27 修回日期:2022-01-14 出版日期:2022-05-15 发布日期:2022-06-01
通讯作者: 李英明,博士,教授。E-mail:578765655@qq.com
作者简介:储安健(1996—),男,硕士研究生。主要从事矿山压力与岩层控制等方面的研究。E-mail:libo_1296@126.com
基金资助:
国家自然科学基金(52174102,51874002)

Modification of Coal Gangue Lime-Fly Ash Mixture by Nano-SiO₂ and Polypropylene Fiber

CHU Anjian^1,2,3, LI Yingming^1,2,3, HUANG Shunjie^1,2,3, CHEN Wan’er⁴

1. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, China;
2. Key Laboratory of Safe and Effective Coal Mining, Ministry of Education, Anhui University of Science and Technology, Huainan 232001, China;
3. School of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, China;
4. College of Safety Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China

Received:2021-12-27 Revised:2022-01-14 Online:2022-05-15 Published:2022-06-01

摘要/Abstract

摘要： 为了研究纳米SiO₂和聚丙烯纤维对煤矸石二灰混合料力学性能及水稳定性能的影响,通过无侧限抗压强度试验、劈裂试验测得各组试件改性前后强度值,并对干湿循环后试件质量、强度值及声发射特性进行分析。结果表明:纳米SiO₂可以提高煤矸石二灰混合料的抗压强度,掺量为2.5%(质量分数)时效果最佳;同时加入纳米SiO₂和聚丙烯纤维可以进一步提升混合料的力学性能,掺加2.5%纳米SiO₂和0.15%(体积分数)聚丙烯纤维时煤矸石二灰混合料力学性能最好;掺加2.5%纳米SiO₂和0.10%(体积分数)聚丙烯纤维的煤矸石二灰混合料水稳定性能最佳。

关键词: 纳米SiO₂, 聚丙烯纤维, 二灰, 煤矸石, 力学性能, 干湿循环

Abstract: In order to study the effects of nano-SiO₂ and polypropylene fiber on the mechanical properties and water stability of coal gangue lime-fly ash mixture, the strength values of each specimen before and after modification were measured by unconfined compressive strength test and splitting test, and the quality difference, strength value and acoustic emission characteristics of the specimens after dry-wet cycle were analyzed. The results show that nano-SiO₂ improves the compressive strength of the mixture, and the improvement effect is the best when the mass content is 2.5%. Adding nano-SiO₂ and polypropylene fiber at the same time further improve the mechanical properties of the mixture.The mechanical properties of coal gangue lime-fly ash mixture are the best when 2.5% nano-SiO₂ and 0.15% (volume fraction) polypropylene fiber were added. It is found that the water stability of coal gangue lime-fly ash mixture mixed with 2.5% nano-SiO₂ and 0.10% (volume fraction) polypropylene fiber is the best.

Key words: nano-SiO₂, polypropylene fiber, lime-fly ash, coal gangue, mechanical property, dry-wet cycle

中图分类号:

U416.1

储安健, 李英明, 黄顺杰, 陈莞尔. 纳米SiO₂和聚丙烯纤维对煤矸石二灰混合料改性试验研究[J]. 硅酸盐通报, 2022, 41(5): 1669-1676.

CHU Anjian, LI Yingming, HUANG Shunjie, CHEN Wan’er. Modification of Coal Gangue Lime-Fly Ash Mixture by Nano-SiO₂ and Polypropylene Fiber[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(5): 1669-1676.

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纳米SiO₂和聚丙烯纤维对煤矸石二灰混合料改性试验研究

Modification of Coal Gangue Lime-Fly Ash Mixture by Nano-SiO₂ and Polypropylene Fiber

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