在快速高温暴露下,活性渣与水泥砂的热力学行为和抗裂性相比,活性渣与水泥砂相比
A Y F Ali1, Sabry A Ahmed1, Y H Helal2
1Materials Engineering Department, Zagazig University, Zagazig, 44519, Egypt.
Scientific reports
|September 17, 2025
概括
高强度活性废渣砂 (HSAAM) 与传统水泥砂相比,具有更高的耐火性. HSAAM是一种可持续的,耐分离的替代品,用于暴露在高温下的结构.
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:
- 传统的水泥材料在高温下容易发生爆炸性分裂,在火灾场景中构成风险.
- 开发可持续和耐火替代品对于高温应用中的结构安全至关重要.
研究的目的:
- 为了比较评估高强度活性渣砂 (HSAAM) 和高强度水泥砂 (HSCM) 的耐火性和热力学性能.
- 评估HSAAM作为传统水泥系统的可持续和耐裂替代品.
主要方法:
- 准备了HSAAM (使用颗粒高炉渣) 和HSCM (使用烟) 的样本.
- 样品经过快速火灾暴露 (200-600°C),并控制了加热速率和停留时间.
- 暴露后分析了剩余的机械性能,热绝缘,质量损失和微观结构变化.
主要成果:
- HSAAM在高达600°C的温度下表现出完全的分离性,而HSCM在400°C的温度下表现出分离性,并在水火下发生灾难性故障.
- 在400°C时,HSAAM保留了显著的压力和拉伸强度,在残留性能和隔热方面表现优于HSCM.
- SEM/EDS分析显示,HSAAM的纳米孔隙矩阵有助于蒸汽释放,减轻内部压力并防止裂变.
结论:
- 与HSCM相比,HSAAM具有出色的耐火性和优越的隔热性能.
- 纳米孔隙结构的HSAAM是其增强的分裂阻力的关键.
- 活性废渣砂是耐火结构应用的有希望的,可持续的替代品.
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