基岩纤维增强EPS地质聚合物轻质混凝土的多性能进化和elasto-塑料损伤建模
Feng Liang1,2, Qingshun Yang1,2, Jutao Tao1,2
1Department of Civil Engineering, Qinghai University, Xining 810016, China.
Polymers
|September 27, 2025
概括
这项研究研究了基岩纤维增强的轻质扩展聚乙烯地质聚合物混凝土 (LEGC). 优化的LEGC (LEGC20BF06) 显示出出色的机械性能和密度,适合结构应用,具有经过验证的性能优化预测模型.
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.
- 混凝土技术 混凝土技术
背景情况:
- 轻质混凝土在施工中具有优势,但经常面临机械强度的挑战.
- 地质聚合物混凝土为传统的波特兰水泥混凝土提供了一个可持续的替代方案.
- 加入扩展聚钢 (EPS) 和玄武岩纤维 (BF) 可以改变混凝土的性能.
研究的目的:
- 阐明基岩纤维增强轻型扩展聚乙烯地质聚合物混凝土 (LEGC) 的多性能演变机制.
- 设计和评估不同EPS和BF含量的LEGC混合物.
- 开发LEGC机械性质的预测模型和分割拉伸行为的构成模型.
主要方法:
- 对LEGC进行实验测试,EPS (10-40%) 和BF (0.4-0.8%) 含量因密度,强度和流动性而变化.
- 使用X射线CT扫描和SEM进行微结构分析.
- 开发和验证用于分割拉伸和屈曲强度的预测模型.
- 一个分裂拉伸力elasto-塑料损伤构成模型的建议.
主要成果:
- 增加EPS含量降低了机械强度,而BF表现出一个上升然后下降的强化趋势.
- LEGC20BF06以40.87MPa的压力强度和1747.6公斤/立方米密度实现了最佳性能.
- 微结构分析证实了EPS和BF对LEGC行为的协同作用.
- 预测模型和构成模型在预测LEGC性能方面表现出高准确性.
结论:
- LEGC20BF06符合结构轻质混凝土的标准,通过协同的EPS和BF整合来证明最佳性能.
- 经过验证的预测模型为LEGC性能优化提供了强大的理论支持.
- 开发的构成模型准确地描述了LEGC在分裂拉伸负荷下的elasto-plastic损伤行为.
- 结果支持LEGC在绿色建筑和预制结构系统中的应用.
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