不钢AOD的制备和机制分析 渣渣混合物基础材料
Liuyun Huang1, Guogao Wei1, Zhuxin Lan1
1School of Civil Engineering and Architecture, Guangxi University of Science and Technology, Liuzhou 545006, China.
Materials (Basel, Switzerland)
|March 13, 2024
概括
这项研究开发了一种使用氧脱碳 (AOD) 的稳定循环聚合物,用于道路基础的废渣和飞灰. 使用3%的AOD渣实现了最佳性能,提高了机械性能并减少了膨胀.
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:
- 氧脱碳 (AOD) 渣是一种工业副产品,具有利用潜力.
- 回收聚合物 (RA) 越来越多地用于建筑,以促进可持续性.
- 从废物中开发新的建筑材料解决了环境问题和资源效率问题.
研究的目的:
- 开发一种新的稳定循环聚合物,使用AOD渣,水泥,飞灰 (FA) 和循环聚合物 (RA).
- 研究这种新聚合物的机械性能和机械行为,用于道路基层应用.
- 确定AOD渣的最佳比例,以便有效地用于路基材料.
主要方法:
- 设计了20个混合比例方案,使用不同的水泥剂量和AOD渣替换率 (R/%) 以1:4的水泥:FA比率.
- 进行了压缩试验和为期7天的不受限制的压力强度试验,以确定初步参数.
- 在不同年龄段进行了不受限制的压力强度,间接拉力强度,压力反弹模量和膨胀率测试.
- 利用X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 来分析底层反应机制.
主要成果:
- 发现3%的水泥剂量符合工程要求.
- 材料强度,模块和膨胀率初步增加,随后随着年龄的增长而稳定.
- 强度和模量最初随着AOD渣含量 (R) 的增加而增加,然后减少.
- 添加AOD渣刺激了水化和pozzolanic反应,增强了材料的性能.
结论:
- 开发的稳定回收聚合物对道路基层应用具有前景.
- 3%的AOD渣替换率 (R) 被确定为平衡机械性能和膨胀的最佳.
- 这项研究为在土木工程项目中巧妙地利用AOD渣和RA提供了可行的途径.
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