高容量石膏水泥稳定路基:制备方法和强度形成机制
Meng Zou1, Zhaoyi He2, Yuhua Xia1
1School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China.
Materials (Basel, Switzerland)
|January 8, 2025
概括
这项研究开发了高容量石膏水泥稳定路基 (HPG-CSSB) 以有效利用石膏 (PG). 该HPG-CSSB证明了出色的强度,水稳定性和污染物固化能力,满足排放标准.
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:
- 石 (PG) 是一个主要的工业副产品,需要可持续管理.
- 开发新的PG应用程序对于资源利用和减少废物至关重要.
研究的目的:
- 调查高容量石膏水泥稳定路基 (HPG-CSSB) 的准备和性能.
- 分析HPG-CSSB的机械性能,水稳定性和污染物固化机制.
- 为了确定HPG-CSSB的最佳混合比率.
主要方法:
- 用不同的混合比率准备和测试HPG-CSSB.
- 分析未受限制的压力强度 (UCS) 和水稳定性.
- 使用LD,XRD,FTIR,SEM,EDS和ICP-MS进行微结构和化学表征.
- 对F-和PO43-的污染物固化机制的评估.
主要成果:
- 最佳的混合比率被确定为4%的水泥,1%的CA2,35%的PG和60%的分级粉碎石.
- 60天后UCS达到11.3MPa;28天浸泡后强度降低仅为7.6%.
- 形成C-S-H凝和乙化石 (AFt) 有助于强度和稳定性.
- 通过离子交换和吸附实现了F-和PO43-的有效固化.
结论:
- HPG-CSSB为石提供了一个高效和富有资源的利用途径.
- 开发的材料具有卓越的机械性能,水稳定性和环境修复能力.
- HPG-CSSB符合综合废水排放的A类标准,这表明其可用于实际应用的可行性.
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