在不同的水泥材料系统下对低碳活性再生混凝土的制备和性能进行评估
Cheng Liu1, Xinyan Wang1, Yujiao Li1
1College of Civil Engineering & Architecture, Qingdao Agricultural University, Qingdao 266109, China.
Materials (Basel, Switzerland)
|October 16, 2024
概括
这项研究使用工业废物开发了绿色混凝土,用粉和飞灰取代水泥,用回收粗聚合物取代天然聚合物. 结果显示,改善了机械性能和耐用性,支持可持续建筑.
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:
- 建筑垃圾回收对于绿色建筑至关重要.
- 工业固体废物,如渣粉 (S95) 和飞 (FA),具有作为水泥替代品的潜力.
- 回收粗聚合物 (RCA) 是天然粗聚合物 (NCA) 的替代品.
研究的目的:
- 用S95和FA作为粘合剂制备活性循环混凝土 (AARC),完全取代水泥.
- 调查不同RCA类对AARC机械性能和耐久性的影响.
- 评估AARC的环境绩效和可持续性.
主要方法:
- 开发了使用S95和FA的活性混凝土 (AAC) 混合物.
- 用不同类型的RCA (I,II和III) 取代NCA.
- 评估了AARC的机械强度,收缩,化透,碳化和抗性.
主要成果:
- 随着RCA质量的提高,AARC的机械性能,特别是压力强度显著提高.
- 在较低的RCA类中观察到压力强度的减少 (I类为2.2%,II类为12.7%,III类为21.8%,在550 kg/m3时).
- 在关键的耐久性方面,AARC I级的性能与天然聚合混凝土 (NAC) 相美.
结论:
- AARC是一种可行的绿色建筑材料,利用工业固体废物.
- 这种方法减少了水泥消耗,能源使用,并促进了资源的再利用.
- AARC为建筑行业的环境保护和可持续发展做出了贡献.
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