在干湿和冷解周期下,CGF石材废弃路基材料的耐久性性能
Zimou Wang1,2, Junjie Yang1,2, Yalei Wu1,2
1College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
Materials (Basel, Switzerland)
|September 14, 2024
概括
本研究评估了用CGF粘合剂凝固的石材废弃物用于道路基层. CGF粘合剂表现出优异的干湿抗性,而水泥在融条件下表现出色,为可持续道路建设提供了洞察力.
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.
- 环境工程 环境工程
背景情况:
- 石材行业的石材废物处置是一个全球性的挑战.
- 需要在道路建设中找到可持续的替代水泥,因为水泥对环境的影响很大.
- 利用基于固体废物的粘合剂用于石废物的固化,作为"废物为废物"解决方案的潜力.
研究的目的:
- 为了研究用CGF (碳化残留物,磨砂颗粒高炉渣和飞灰) 粘合剂凝固的石头废物的耐久性性能.
- 在干湿和冷解循环条件下分析机械性能和恶化机制.
- 为了比较CGF固化的石废与传统的水泥固化的石废的耐用性.
主要方法:
- 在模拟环境条件下对固化石废物的宏观和微观性质的评估.
- 应用入孔径测 (MIP) 和扫描电子显微镜 (SEM) 来分析孔隙结构和恶化.
- 在循环负荷下评估不受限制的压力强度和应变软化行为.
主要成果:
- 无论是CGF和水泥粘合剂都表现出延展软化行为,并且随着循环的增加而降低了不受限制的压力强度.
- 在干湿周期下,CGF粘合剂表现出优异的抗性,而在结解周期下,水泥粘合剂表现出更好的性能.
- 恶化与多孔性和裂纹形成的增加有关,干湿周期促进大孔连接,结解周期增加易感的中孔.
结论:
- CGF粘合剂提供了一个可行的,环保的替代方案,用于在路基应用中凝固石废物,特别是在易发生干湿循环的环境中.
- 在不同的环境压力下了解不同的恶化机制对于道路工程中的材料选择至关重要.
- 该研究为基础设施开发中可持续利用固体废物提供了宝贵的理论和技术支持.
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