循环聚合混凝土混凝土与玄武石-多烯二烯纤维混合物的屈曲疲劳性能的实验研究

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Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior

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Chuheng Zhong^1,2,3, Qipeng Xiao¹, Zuwei Fan¹

¹School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan, 430068, China.

Scientific reports

|February 18, 2025

概括

循环聚合混凝土 (RAC) 的性能通过玄武岩纤维 (BF) 和聚烯二烯纤维 (PANF) 得到改善. 这些纤维增强了屈曲强度和疲劳寿命,使RAC适用于道路和桥梁工程.

科学领域:

土木工程土木工程是指土木工程.
材料科学材料科学材料科学
可持续建筑可持续建筑

背景情况:

建筑垃圾,特别是混凝土,带来了环境挑战.
将废弃混凝土回收成回收聚合混凝土 (RAC) 提供了一个可持续的解决方案.
将RAC应用扩展到道路和桥梁工程中,需要提高材料性能.

研究的目的:

调查基岩纤维 (BF) 和聚烯二烯纤维 (PANF) 对再生聚合混凝土 (RAC) 性能的影响.
为了评估纤维增强RAC的屈曲强度和疲劳寿命.
开发RAC疲劳行为的预测模型.

主要方法:

设计了12种混凝土混合物,含有不同的BF和PANF.
在多个应力级别进行了屈曲强度测试和屈曲疲劳测试.
应用韦布尔分布理论用于疲劳寿命分析,并开发了对数式疲劳方程.

主要成果:

BF和PANF显著改善了RAC的屈曲强度和疲劳寿命.
通过0.1%的BF和0.15%的PANF,可以达到最佳性能.
韦布尔理论为分析疲劳寿命提供了一个很好的契合点.
双对数疲劳方程提供了更高的预测准确度.

结论:

盐纤维和聚烯二纤维有效地增强了回收聚合混凝土的机械性能.
纤维增强的RAC显示出在道路和桥梁等苛刻的基础设施项目中使用的潜力.
已建立的疲劳模型准确地预测了纤维增强RAC的长期性能.

关键词:

巴萨尔特纤维是一种基础纤维.疲劳方程疲劳方程疲劳方程疲劳性质疲劳性质聚烯二烯酸纤维纤维的使用最终的疲劳强度是最终的疲劳强度.

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