使用再生混凝土粉 (RCP) 作为部分替代水泥的可持续混凝土的实验和数值评估
Hafiz Asfandyar Ahmed1, Waqas Arshad Tanoli2
1Department of Construction and Quality Management, Hong Kong Metropolitan University, Hong Kong.
Materials (Basel, Switzerland)
|July 12, 2025
概括
回收混凝土粉末 (RCP) 可以取代混凝土中的水泥,其20%的替代物对机械性能的影响最小,同时显著减少二氧化碳排放. 更高的替代品稍微影响了混凝土的性能,但提供了进一步的环境效益.
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:
- 拆除废物带来了重大的环境,社会和经济挑战.
- 可持续的建筑实践对于减轻环境影响至关重要.
研究的目的:
- 调查使用回收混凝土粉 (RCP) 作为混凝土中的水泥替代品的可行性.
- 为了评估RCP整合对混凝土新鲜,硬化和微观结构性质的影响.
- 评估与RCP使用相关的环境效益,特别是二氧化碳排放减少.
主要方法:
- 准备了混凝土混合物,使用RCP替代水泥的比例为0%,20%,25%和30%.
- 评估了新鲜性质 (可加工性) 和硬化性质 (密度,吸收性,压力,曲性,拉力强度).
- 使用非破坏性测试,微结构分析和非线性有限元素分析 (FEA) 来进行曲束模拟.
主要成果:
- 用RCP取代20%的水泥对机械性能没有显著的不利影响.
- 较高的RCP替代 (25-30%) 对机械性能影响较小.
- 20%的RCP替代导致压力强度减少15-18% (7-28天),但二氧化碳排放量减少20%.
- FEA模拟证实了实验发现.
结论:
- 将高达20%的回收混凝土粉作为水泥替代品是可行的可持续建筑解决方案.
- 这种方法平衡了具体的性能与显著的环境效益,减少二氧化碳排放.
- 进一步研究更高的替代水平可以优化混凝土生产中的生态效率.
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