为循环性优化混凝土:对地质聚合物和普通混凝土进行比较生命周期评估
Omid Bamshad1, Amir Mohammad Ramezanianpour2
1Faculty of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran.
Environmental science and pollution research international
|September 7, 2024
概括
地质聚合物混凝土 (GPC) 和圆形地质聚合物混凝土 (CGPC) 与波特兰水泥混凝土 (PCC) 相比,大大降低了环境影响. 从摇篮到摇篮的生命周期评估 (LCA) 证实了它们增强的可持续性潜力.
科学领域:
- 可持续的建筑材料 可持续的建筑材料
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 地质聚合物混凝土 (GPC) 使用工业副产品,提供无水泥替代品.
- 综合性环境评估需要从摇篮到摇篮的生命周期评估 (LCA),包括使用寿命和寿命结束的考虑.
- 传统的LCA往往忽略了这些关键的生命周期阶段,可能误解了材料的可持续性.
研究的目的:
- 对圆形地质聚合混凝土 (CGPC),地质聚合混凝土 (GPC) 和圆形普通混凝土 (COC) 与波特兰水泥混凝土 (PCC) 进行摇篮对摇篮的比较LCA.
- 识别来自于排除使用寿命和寿命终结场景的常见LCA偏差.
- 评估替代具体情景的整体可持续性潜力.
主要方法:
- 使用了一个比较的摇篮对摇篮生命周期评估 (LCA) 方法.
- 功能单位的定义是为了确保不同混凝土类型之间的公平比较.
- 评估了整个生命周期的环境影响,包括使用寿命和生命周期结束阶段.
主要成果:
- 与PCC相比,GPC和CGPC显著减少了环境影响,特别是全球变暖潜力,约为53%.
- 排除使用寿命和寿命终结场景改变了关键的LCA指标 (例如电离辐射,资源耗尽) 和替代混凝土的比较优先级.
- 与PCC相比,CGPC和GPC的可持续性潜力大幅增加:分别为213%和276%.
结论:
- 摇篮到摇篮的LCA验证了GPC和CGPC对传统混凝土的显著环境益处.
- 对使用寿命和寿命末期情景的核算对于准确评估建筑材料的可持续性至关重要.
- GPC和CGPC是高度可持续的替代品,具有相当大的潜力,可以减轻建筑行业的环境足迹.
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