摘要
为了研究纳米SiO_(2)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SiO_(2)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SiO_(2)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SiO_(2)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SiO_(2)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。
In order to study the effects of nano-SiO_(2)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-SiO_(2)improves the compressive strength of the mixture,and the improvement effect is the best when the mass content is 2.5%.Adding nano-SiO_(2)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-SiO_(2)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-SiO_(2)and 0.10%(volume fraction)polypropylene fiber is the best.
作者
储安健
李英明
黄顺杰
陈莞尔
CHU Anjian;LI Yingming;HUANG Shunjie;CHEN Wan’er(State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan 232001,China;Key Laboratory of Safe and Effective Coal Mining,Ministry of Education,Anhui University of Science and Technology,Huainan 232001,China;School of Mining Engineering,Anhui University of Science and Technology,Huainan 232001,China;College of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China)
出处
《硅酸盐通报》
CAS
北大核心
2022年第5期1669-1676,共8页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(52174102,51874002)。
