基于地质聚合物的流化固化土壤的开发和性能评估,使用石膏和渣粉用于道路填充
Xiaojuan Li1, Ping Zheng2, Honglei Lu3,4
1Shaanxi Transportation Holding Group Technology Development Co., Ltd., Xi'an 710075, China.
Materials (Basel, Switzerland)
|December 11, 2025
概括
这项研究开发了基于的液化固化土壤 (PFSS),使用地质聚合物作为水泥替代品. 由此产生的材料为高速公路填充提供了出色的可加工性和机械强度,同时固定重金属.
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.
- 环境科学 环境科学
背景情况:
- 工业固体废物利用对于可持续建筑材料至关重要.
- 在狭窄的土木工程空间中实现有效的回填质量存在挑战.
- 来自工业废物的流动性固化材料为传统的回填限制和资源效率提供了解决方案.
研究的目的:
- 用地质聚合物作为结合剂制备和评估基于的流化固化土壤 (PFSS).
- 为了评估PFSS的可加工性,机械强度和有毒物质浸出.
- 研究PFSS中强度形成和重金属固定的机制.
主要方法:
- 石被用来合成地质聚合物,在PFSS配方中取代水泥.
- 评估了可加工性,压力强度,加利福尼亚轴承比率 (CBR) 和弹性模块.
- 进行了微结构分析 (水合,波佐兰反应,地质聚合,碳化) 和重金属漏试验.
主要成果:
- 最佳的PFSS成分:水与固体的比率为0.48-0.50,地质聚合物含量为12-18%.
- 实现的性能:流动性160-220毫米,28天压力强度0.86MPa,CBR8%,弹性模块40MPa,符合高档高速公路标准.
- 重金属 (As,Pb,Cr) 漏度符合中国的三级地下水标准.
结论:
- 具有最佳组成的PFSS满足高速公路回填充的性能要求.
- 地质聚合,水合,波佐兰反应和碳化有助于增强强度.
- 一个由C-S-H,C-A-S-H凝和埃特灵石 (AFt) 组成的相互锁定的3D网络通过吸附和化学结合使重金属固定不动.
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