在温度升高后,钢纤维增强混凝土的机械性能
Jiongfeng Liang1, Kaiwei Liu1, Caisen Wang2
1Faculty of Civil and Architecture Engineering, East China University of Technology, Nanchang, China.
Scientific reports
|February 26, 2025
概括
钢纤维增强混凝土 (SFRRC) 在高温后表现出更好的机械性能,特别是1.2%的钢纤维和5%的. 这提高了混凝土的安全性和耐用性,在火灾情况下.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 消防安全工程 消防安全工程
背景情况:
- 工程火灾的频率越来越高,需要了解极端条件下的材料行为.
- 在高温后评估混凝土的剩余机械性能对于结构完整性至关重要.
- 钢纤维增强混凝土 (SFRRC) 提供了改善耐火性的潜力.
研究的目的:
- 在暴露于高温后,研究SFRRC的机械性能.
- 评估不同钢纤维含量和替代率对SFRRC性能的影响.
- 开发SFRRC火灾后行为的预测模型.
主要方法:
- 准备了具有不同钢纤维含量 (0.6%,1.2%) 和替代比率 (0%,5%,10%,15%) 的样本.
- 材料受到高温的影响,温度从20°C到800°C不等.
- 机械测试包括立方压缩,轴压缩,分裂张力和四点曲.
主要成果:
- 钢纤维和降低了裂纹风险,并抑制了高温下的裂纹延伸.
- 在1.2%的钢纤维和5%的中观察到最佳性能,压力,拉力和屈曲强度显著增加.
- 开发了SFRRC高温后性能预测模型,并根据实验数据进行了验证.
结论:
- 与火灾暴露后的普通混凝土相比,SFRRC表现出更高的耐用性和安全性.
- 该研究为制定规范和促进SFRRC的使用提供了有价值的数据.
- 开发的模型有助于预测SFRRC在火灾场景中的表现.
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