通过性激活精细建筑和拆除废物的混合粘合剂
Manuel Retamal-Rojas1, Diego Aponte1, William Valencia-Saavedra2
1Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya (UPC-BarcelonaTech), Jordi Girona 1-3, 08034 Barcelona, Spain.
Materials (Basel, Switzerland)
|July 30, 2025
概括
建筑和拆除废物 (CDW) 可以使用性激活取代普通波特兰水泥. 这项研究表明,CDW结合剂提供了一个可持续的替代品,优化活性系统的循环经济战略.
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:
- 普通的波特兰水泥生产对环境产生了重大影响.
- 建筑和拆除废物 (CDW) 丰富且未得到充分利用.
- 性激活提供了利用CDW作为粘合剂的途径.
研究的目的:
- 评估由CDW制成的活性结合剂的物理,机械和微观结构特性.
- 为了研究激活剂成分对粘合剂性能的影响.
- 评估CDW作为可持续的替代粘合剂的潜力.
主要方法:
- 使用氧化 (NaOH) 和酸盐 (SS) 溶液激活了CDW (混凝土 - RH,陶 - RC).
- 准备的砂具有不同的NaOH/SS比率 (0.2,0.3) 和激活剂与前体 (AA/P) 比率为0.2.2.
- 分析了物理性质 (设置时间,收缩),机械性质 (压力强度) 和微结构性行为 (XRD,FTIR).
主要成果:
- 更高的NaOH含量加快了设置时间.
- 增加的SS含量导致了更大的干燥收缩.
- 28天后的压力强度在7.6到8.2MPa之间.
- XRD证实了非反应性晶体相,而FTIR表明了水化凝的形成 (CASH,CSH, (N) CASH).
结论:
- 通过性激活,CDW显示出作为可持续替代粘合剂的潜力.
- 该研究提供了一种利用CDW优化活性系统的方法.
- 这项研究有助于建设部门的循环经济战略.
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