基于与Nano-SiO2和酸盐集成废物液体回收的共修改回收细聚合物的活性砂研究
Qiushi Su1, Changbai Wang1,2, Jimin Liu1,2
1School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China.
Materials (Basel, Switzerland)
|November 13, 2025
概括
这项研究提高了回收精细聚合物 (RFA) 砂的性能,使用纳米SiO2-酸盐处理和活性渣. 修改后的RFA和回收废物液体显著提高了强度和耐久性,同时降低了成本和环境影响.
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:
- 回收精细聚合物 (RFA) 的广泛使用受到其多孔性质和粘附薄弱的砂的限制.
- 开发可持续的建筑材料需要有效利用回收聚合物.
- 活性渣提供了一个有前途的替代性水泥粘合剂,具有环境效益.
研究的目的:
- 调查纳米-SiO2-酸盐混合溶液 (NMS) 的有效性,以加强RFA上的粘合砂.
- 通过使用改性RFA (MRFA) 和回收废物液体 (RNMS) 来评估活性渣回收精细聚合砂 (AASRM) 的性能,经济和环境效益.
- 探索处理废物液体作为酸盐源的现场回收.
主要方法:
- 用NMS处理RFA以产生MRFA.
- 使用活性渣,MRFA和RNMS作为活性剂制备AASRM.
- 性能测试包括压力强度,可加工性,毛细血管吸收水和干燥收缩.
- 使用C-(N) -A-S-H凝形成和界面过渡区 (ITZ) 评估进行微结构分析.
主要成果:
- 纳入MRFA显著改善了AASRM性能,28天压力强度 (38.3MPa) 增加了57.6%,可加工性提高.
- 毛细血管吸收水和90天的干燥缩水分别减少了49.5%和40.2%.
- 通过促进C-(N) -A-S-H凝的形成,NMS处理使RFA表面变密,并加强ITZ.
- 使用RNMS作为性激活剂源,可以达到新鲜激活剂的砂压力强度的95.6%,降低成本和嵌入碳.
结论:
- NMS处理有效地加强了RFA上粘附的砂,使其能够在活性废渣系统中成功应用.
- 作为RNMS的回收处理废物液提供了一个可持续且具有成本效益的活性源,而不会影响砂的性能.
- 本研究提出了一种可行的方法,以提高回收精细聚合物的利用率,并促进建筑行业的循环经济原则.
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