为研究纳米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

In order to study the influence of nano-SiO2 and polypropylene fiber on the mechanical properties and water stability of coal gangue and lime-ash mixture, the strength values ​​of each group of specimens before and after modification were measured through unconfined compressive strength test and split test, and The poor quality, intensity value and acoustic emission characteristics of the specimens after the dry-wet cycle are analyzed. The test results show that nano-SiO2 can improve the compressive strength of the mixture, and the effect is best when the mass content is 1.5%; at the same time, adding nano-SiO2 and polypropylene fiber can further improve the mechanical properties of the mixture, 0.15% nano-SiO2 and 2.5% The combination effect of polypropylene fiber is the best; and it is found that adding 2.5% nano SiO2 and 0.1% polypropylene fiber has the best water stability performance.

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 group of specimens before and after modification were measured through unconfined compressive strength test and splitting test, and the quality difference, strength value and acoustic emission characteristics of specimens after dry wet cycle were analyzed. The test results show that nano-SiO2 can improve the compressive strength of the mixture, and the effect is the best when the mass content is 1.5%; At the same time, adding nano-SiO2 and polypropylene fiber can further improve the mechanical properties of the mixture, and the combination effect of 0.15% nano-SiO2 and 2.5% polypropylene fiber is the best; It is found that the water stability of 2.5% nano SiO2 and 0.1% polypropylene fiber is the best.

In order to study the influence of nano-SiO2 and polypropylene fiber on the mechanical properties and water stability of coal gangue fly ash mixture, unconfined compressive strength test and splitting test were used to measure the strength values of each group of specimens before and after modification, and the poor quality, strength values and acoustic emission characteristics of the specimens after dry-wet cycle were analyzed. The test results show that nano-SiO2 can improve the compressive strength of the mixture, and the best effect is obtained when the mass content is 1.5%. At the same time, adding nano-SiO2 and polypropylene fiber can further improve the mechanical properties of the mixture, and the combination effect of 0.15% nano-SiO2 and 2.5% polypropylene fiber is the best. And it is found that the water stability of 2.5% nano-SiO2 and 0.1% polypropylene fiber is the best.