高温下玄武岩纤维增强地质聚合物混凝土的动态压缩力学行为

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (3): 914-921.

所属专题：资源综合利用

高温下玄武岩纤维增强地质聚合物混凝土的动态压缩力学行为

冷玲倻¹, 张鹏飞^2,3, 梁文文¹

1.江西科技学院城市建设学院,南昌 330098;
2.江西省灌溉排水发展中心,南昌 330013;
3.江西水利职业技术学院建筑工程系,南昌 330013

收稿日期:2023-11-03 修订日期:2023-12-06 出版日期:2024-03-15 发布日期:2024-03-27
作者简介:冷玲倻(1986—),女,讲师。主要从事土木工程材料的研究。E-mail:lenglingyejxkjxy@163.com
基金资助:
江西省教育厅科学技术研究项目(GJJ202020)

Dynamic Compressive Mechanical Behavior of Basalt Fiber Reinforced Geopolymer Concrete under High Temperature

LENG Lingye¹, ZHANG Pengfei^2,3, LIANG Wenwen¹

1. College of Urban Construction, Jiangxi University of Technology, Nanchang 330098, China;
2. Irrigation and Drainage Center in Jiangxi Province, Nanchang 330013, China;
3. Department of Construction Engineering, Jiangxi Water Resources Institute, Nanchang 330013, China

Received:2023-11-03 Revised:2023-12-06 Online:2024-03-15 Published:2024-03-27

摘要/Abstract

摘要： 为研究高温下玄武岩纤维增强地质聚合物混凝土(BFRGC)的动态压缩力学行为,本文制备了纤维体积掺量为0%、0.1%、0.2%、0.3%的BFRGC试件,并对其进行了不同温度(20、200、400、600、800 ℃)下的动态冲击试验。结果表明:BFRGC试件静态抗压强度、动态抗压强度和比能量吸收具有明显的温度强化效应和高温损伤效应,峰值应变表现出显著的温度塑化效应。BFRGC试件的静态抗压强度、动态抗压强度的温度阀值为400 ℃。随着温度的升高,BFRGC试件的静态抗压强度、动态抗压强度和比能量吸收均先增大后减小,峰值应变不断增大。掺加适量的玄武岩纤维可以提高常温及高温下地质聚合物混凝土的静态抗压强度和动态力学性能,且其最佳掺量为0.1%。

关键词: 地质聚合物混凝土, 玄武岩纤维, 动态力学性能, 高温, 分离式霍普金森压杆(SHPB)

Abstract: In order to study the dynamic compressive mechanical behavior of basalt fiber reinforced geopolymer concrete (BFRGC) after high temperature, BFRGC specimens with fiber volume content of 0%, 0.1%, 0.2% and 0.3% were prepared, and dynamic impact tests of BFRGC specimens at 20, 200, 400, 600 and 800 ℃ were carried out. The results show that the static compressive strength, dynamic compressive strength and specific energy absorption of BFRGC specimens have obvious temperature enhancement effect and high temperature damage effect, and the peak strain shows a significant temperature plasticization effect. The temperature threshold of static compressive strength and dynamic compressive strength of BFRGC specimens is 400 ℃. With the increase of temperature, the static compressive strength, dynamic compressive strength and specific energy absorption of BFRGC specimens increase first and then decrease, and the peak strain increases continuously. The static compressive strength and dynamic mechanical properties of geopolymer concrete at room temperature and high temperature can be improved by adding appropriate content of basalt fiber, and the optimal content of basalt fiber is 0.1%.

Key words: geopolymer concrete, basalt fiber, dynamic mechanical property, high temperature, split Hopkinson pressure bar (SHPB)

中图分类号:

TU528

冷玲倻, 张鹏飞, 梁文文. 高温下玄武岩纤维增强地质聚合物混凝土的动态压缩力学行为[J]. 硅酸盐通报, 2024, 43(3): 914-921.

LENG Lingye, ZHANG Pengfei, LIANG Wenwen. Dynamic Compressive Mechanical Behavior of Basalt Fiber Reinforced Geopolymer Concrete under High Temperature[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(3): 914-921.

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高温下玄武岩纤维增强地质聚合物混凝土的动态压缩力学行为

Dynamic Compressive Mechanical Behavior of Basalt Fiber Reinforced Geopolymer Concrete under High Temperature

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