通过加速碳化处理和传统方法修改的回收混凝土聚合物的比较生命周期评估
Yunhui Pu1, Lang Li2, Xiaoshuang Shi2
1School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, China; College of Architecture and Environment, Sichuan University, Chengdu 610065, China.
Waste management (New York, N.Y.)
|November 4, 2023
概括
加速碳化增强了回收混凝土聚合物 (RCAs),大大减少了环境影响和能源需求. 这种可持续的方法为实现建筑中的碳中和提供了传统处理方法的有希望的替代方案.
科学领域:
- 环境科学 环境科学
- 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.
背景情况:
- 建筑和拆除废物回收对于建筑行业的碳中和目标至关重要.
- 加速碳化技术为改善回收混凝土聚合物 (RCAs) 和减少全球变暖潜力提供了一种新的方法.
研究的目的:
- 通过加速碳化处理处理的RCAs进行比较生命周期评估与传统方法.
- 为了评估混凝土的环境影响,结合这些修改后的RCAs.
- 确定主要的环境影响贡献者,并分析运输距离的敏感性.
主要方法:
- 循环混凝土聚合物的生命周期比较评估 (LCA).
- 与传统的粉碎和加热方法相比,加速碳化处理的评估.
- 对混凝土采用碳化RCAs的运输距离的灵敏度分析.
主要成果:
- 与天然聚合物混凝土相比,碳化RCAs的混凝土显著减少了能源需求,环境影响和成本.
- 加速碳化比传统处理方法更有优越的环境效益,特别是对全球变暖的潜在影响.
- 水泥生产和运输被确定为使用碳化RCAs的混凝土的主要环境影响贡献者.
结论:
- 加速碳化是一种高度有效的技术,可以增强RCAs并减轻建筑行业的环境负担.
- 碳化RCAs作为天然聚合物的替代品的使用对环境有利,特别是当天然聚合物需要长途运输时.
- 优化物流,考虑到回收中心与城市地区的距离,可以进一步提高碳化RCA混凝土的可持续性.
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