通过优化混合补充水泥材料的优化,提高自压缩混凝土的可持续性
Abdul Aziz1, Syed Saqib Mehboob2, Aisha Tayyab3
1Department of Civil Engineering, University of Engineering and Technology, Taxila, Pakistan.
Scientific reports
|May 29, 2024
概括
这项研究优化了自压缩混凝土 (SCC),通过用甲 (MK) 和石灰粉 (LP) 替换水泥. 通过40-55%的水泥替换,实现最佳性能,平衡可加工性,机械强度和可持续性.
科学领域:
- 混凝土工程 混凝土工程
- 材料科学 材料科学 材料科学
- 可持续发展 可持续发展 可持续发展
背景情况:
- 自压缩混凝土 (SCC) 提供了更好的可加工性,但在不损害结构完整性的情况下降低水泥含量方面面临挑战.
- 全球趋势主张在混凝土中使用废弃物和补充水泥材料 (SCM),以提高可持续性.
- 通过减少对环境的影响,将SCM整合与联合国的可持续发展目标 (SDGs) 保持一致.
研究的目的:
- 为了研究metakaolin (MK) 和石灰粉 (LP) 作为部分水泥替代品的最佳组合,在SCC.
- 评估MK和LP对SCC的风湿学和机械性能的影响.
- 为了确定可持续和结构健全的SCC,理想的水泥替代水平.
主要方法:
- 使用响应表面方法 (RSM) 系统地探索成分比率.
- 分析了16种混合物的直角阵列,不同的混合物和工艺参数.
- 通过沉流量,L-box和子分离测试来评估风湿性质.
- 机械强度通过压力强度测试在7日和28日进行评估.
主要成果:
- 高度的MK对可加工性和硬化性能产生了负面影响.
- 在RSM分析中,SCC的最佳替代水泥范围为40%至55%.
- 该研究确定了质性能,机械强度和可持续性之间的平衡.
结论:
- 用甲和石灰石粉代替部分水泥是一种可持续的SCC的可行策略.
- 40-55%的最佳水泥更换范围确保了工程要求和环境效益.
- 这项研究有助于开发环保和高性能的具体实践.
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