作为透水混凝土和结构石膏的可持续粘合剂的活性渣:可行性研究
Denny Coffetti1,2,3, Simone Rapelli1, Luigi Coppola1,2,3
1Department of Engineering and Applied Sciences, University of Bergamo, Viale Marconi, 5, 24044 Dalmine, Italy.
Materials (Basel, Switzerland)
|August 29, 2024
概括
活性渣 (AAS) 粘合剂为波特兰水泥提供了一个可持续的替代品. 这项研究表明,AAS石膏符合建筑改造的强度要求,AAS透水混凝土使用回收聚合物,这两者都减少了对环境的影响.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续建筑 可持续建筑
- 地质化学 地质化学
背景情况:
- 传统的波特兰水泥生产具有显著的碳足迹.
- 开发低环境影响的粘合剂对于可持续建筑至关重要.
- 活性渣 (AAS) 粘合剂是一个有希望的替代品.
研究的目的:
- 研究AAS粘合剂用于结构石膏和透水混凝土的可行性.
- 开发一种M10级的AAS石膏,用于造建筑的改造.
- 评估使用道泥作为AAS透混凝土中的回收聚合物.
主要方法:
- 制定并测试了可加工性,适用性和压力强度的AAS石膏.
- 嵌入了减少收缩的添加剂,以减轻石膏收缩.
- 开发了AAS透水混凝土,使用道泥聚合物,评估强度和透性.
- 分析了聚合物大小和无细混凝土的特性之间的关系.
- 将AAS材料的全球变暖潜力 (GWP) 和总能耗 (GER) 与传统材料进行了比较.
主要成果:
- AAS石膏实现了28天的压力强度为10.8MPa,并减少了高达45%的收缩.
- 使用道泥聚合物的AAS透水混凝土达到高达20MPa的压力强度和500-3000mm/min的透率.
- 证实了聚合物大小对无细混凝土性能的影响.
- 与传统材料相比,AAS材料显示GWP降低了50-75%,GER降低了10-30%.
结论:
- 活性渣粘合剂适用于结构性石膏和透混凝土应用.
- 回收道污泥可以有效地作为AAS透混凝土中的聚合物.
- 基于AAS的材料提供了显著的环境效益,与传统的水泥材料相比,减少了GWP和GER.
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