回收聚合混凝土:补充水泥材料的影响和支持可持续建筑的潜力
1Institute of Sustainable Built Environment, Heriot-Watt University Dubai, Dubai Knowledge Park, Dubai P.O. Box 501745, United Arab Emirates.
Materials (Basel, Switzerland)
|November 27, 2025
概括
在混凝土中使用回收聚合物可以减少对环境的影响. 虽然它没有提高强度,但补充性水泥材料 (SCMs) 提高了耐用性,并大大减少了回收聚合混凝土中的碳.
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
- 环境科学 环境科学
背景情况:
- 建筑和拆除废物是一个主要的环境问题.
- 回收聚合物 (RA) 为混凝土生产提供了一个可持续的替代品.
- 与原始聚合混凝土混凝土相比,RA混凝土通常具有较低的机械性能和耐久性.
研究的目的:
- 研究混凝土的机械性能,耐用性和体现的碳,使用来自阿联的本地来源的回收粗聚合物.
- 评估补充性水泥材料 (SCM) 的影响,特别是磨砂颗粒高炉渣 (GGBS) 和烟,对RA混凝土性能.
- 评估将SCM纳入RA混凝土的环境效益,特别是体现的碳减排.
主要方法:
- 设计了8个混凝土混合物,使用原始和回收粗聚合物.
- 选择的混合物中含有不同比例的GGBS和烟,作为波特兰水泥的部分替代品.
- 机械性质 (强度),耐用性指标 (吸水,入,干燥收缩) 和体内碳被评估超过180天.
主要成果:
- 与原始聚合混凝土混凝土相比,将波特兰水泥部分替换为GGBS和烟并没有显著提高RA混凝土的强度或减少RA混凝土的吸水能力.
- 使用SCM的RA混凝土表现出对离子透的抗性提高,干燥收缩率降低.
- 与传统混凝土相比,SCM的使用导致了体内碳的大幅减少 (超过40%).
结论:
- 虽然SCM并没有提高RA混凝土的强度,但它们提高了其耐用性,并显著减少了其环境足迹.
- 采用SCM的回收聚合混凝土混凝土为可持续建筑提供了一个有希望的方法,平衡性能与减少环境影响.
- 这些发现支持在混凝土中使用RA和SCM来减轻建筑行业的环境负担.
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