使用环氧树脂聚合物的回收混凝土聚合物的界面改进和多尺度评估
J Rajprasad1, G K Arunvivek2, Pramod Kumar3
1Department of Civil Engineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603203, India.
Scientific reports
|January 21, 2026
概括
环氧树脂处理显著提高回收混凝土聚合物 (RCA) 的性能. 与未经处理的RCA (UTRAC) 混凝土相比,经过处理的RCA (ERTAC) 混凝土表现出更好的强度和更低的孔隙性.
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.
- 可持续建筑 可持续建筑
背景情况:
- 回收混凝土聚合物 (RCA) 在混凝土应用中存在挑战,因为与天然聚合物相比,其粘合力较弱,孔隙性较高,强度较低.
- 有效利用RCA对于可持续建筑和建筑环境中的废物减少至关重要.
研究的目的:
- 研究环氧树脂聚合物处理对回收混凝土聚合物 (RCA) 的影响.
- 评估使用经过处理的RCA (ERTAC) 和未经处理的RCA (UTRAC) 在混凝土中增强压力和分裂拉伸强度.
主要方法:
- 混凝土混合物是用UTRAC和ERTAC准备的,使用不同水平的天然聚合物 (25%,50%,75%,100%) 取代.
- 机械性能 (压力和分裂抗拉强度) 在3,7和28天进行了测试.
- 使用扫描电子显微镜 (SEM) 和X射线衍射 (XRD) 进行了微结构分析.
主要成果:
- 在100%替换下,未经处理的RCA (UTRAC) 导致强度降低高达26.32% (压缩) 和35.38% (拉力).
- 与对照混凝土相比,经过处理的RCA (ERTAC) 显示出更高的性能,压力强度增长高达26.32% (更换25%),拉伸强度增长高达122.73% (更换100%).
- 在ERTAC混凝土中,SEM和XRD分析表明改善了颗粒包装,减少了孔隙性和增强了界面过渡区 (ITZ).
结论:
- 环氧树脂聚合物处理有效地减轻了与回收混凝土聚合物相关的弱点.
- 确定ERTAC的25%的替换比率是提高混凝土强度的最佳,而更高的比率也显示出显著的改善.
- 处理过的RCA为生产高性能混凝土提供了可行的解决方案,促进了建筑中的循环经济原则.
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