在混合性水泥中利用固体CO2:干冰作为通往高性能和低排放材料的途径
Yi-Sheng Wang1, Bong-Seop Lee2, Hongzhi Zhang3
1Department of Integrated Energy and Infra System, Kangwon National University, Chuncheon-si 24341, Republic of Korea.
Environmental research
|February 1, 2026
概括
这项研究引入了干冰添加到混合性水泥 (HAC) 以提高混凝土性能和碳储存. 最佳10%的干冰可以提高强度和耐久性,同时在现场造应用中减少碳排放.
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.
- 环境科学 环境科学
背景情况:
- 混凝土行业面临大量的二氧化碳排放,需要新的碳管理策略.
- 传统的碳化固化仅限于预制元件,需要用于现场造混凝土的解决方案.
研究的目的:
- 为了研究固体二氧化碳 (干冰) 在混合性水泥 (HAC) 系统中加入的情况.
- 评估干冰对混凝土水分,机械性能,耐用性和相位演变的影响.
- 评估这种新方法的碳储存潜力和可持续性.
主要方法:
- 制备具有不同干冰含量 (0-15%) 的HAC混合物.
- 使用异热热度测量,X射线衍射 (XRD),热重度测量 (TG),里埃变换红外光谱学 (FTIR) 和扫描电子显微镜 (SEM) 的分析.
- 机械测试 (压力强度) 和耐久性评估 (表面电阻).
主要成果:
- 干冰适度性,增强水化,并促进早期碳酸盐降水.
- 在28天内,最佳的10%干冰添加增加了37.45%的压力强度和22.69%的表面电阻.
- 过度的干冰 (15%) 对性能产生了负面影响,原因是温度早期下降和废渣活化减少.
结论:
- 干冰的添加提供了一个低成本,可扩展的方法,用于同时储存碳和提高HAC的性能.
- 这种技术特别适用于传统碳化固化不切实际的现场造应用.
- 这项研究表明,实现碳中和水泥材料的可行途径具有更好的耐用性和结构完整性.
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