用硫酸中和的红色泥的特性和对水泥砂的影响
Suk-Pyo Kang1, Sang-Jin Kim2, Seong-Uk Hong1
1Department of Construction Engineering, Woosuk University, Jincheon 27841, Republic of Korea.
Materials (Basel, Switzerland)
|July 14, 2023
概括
将工业红泥回收成建筑材料是可行的. 中和的红泥有效地替代了砂中的水泥,保持了类似的机械和水化性能,提供了可持续的建筑解决方案.
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.
- 环境工程 环境工程
背景情况:
- 红泥是生产的主要工业副产品.
- 每年的红泥产量超过30万,这给处置带来了重大挑战.
- 在建筑等行业中,可持续地利用红色泥至关重要.
研究的目的:
- 调查回收红色泥进入建筑行业的潜力.
- 用硫酸 (LRM + S) 中和的液化红泥 (LRM) 制备和特征.
- 评估LRM + S作为水泥替代品对砂性能的影响.
主要方法:
- 红色的泥被液化并用硫酸中和.
- LRM + S 用于以不同的替代率替代砂混合物的水泥.
- 测试了机械性能 (压力强度,流量,设置时间).
- 使用扫描电子显微镜 (SEM) 和X射线衍射 (XRD) 分析了水化特征.
主要成果:
- 在pH值为7.6时稳定LRM + S,SO3含量增加.
- 砂流量和设置时间随着LRM + S替代率的增加而减少.
- 用LRM + S取代5%的水泥,导致压力强度与普通水泥砂相当.
- 在SEM和XRD分析中,与普通砂相比,LRM + S含有砂的水化产品相似.
结论:
- 用硫酸中和的液化红泥 (LRM + S) 可以有效地用作水泥替代品.
- 在砂中使用LRM + S在最佳替代水平下不会显著损害机械或水化性能.
- 这项研究证明了在建筑中回收红泥的可行方法,促进循环经济原则.
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