用纸稳定砂土的强度和微观结构特征 灰基地质聚合物
Mohammed Riyadh Hayder1, Hassan Ziari2, Alaa M Shaban3
1Department of Highway and Transportation Engineering, School of Civil Engineering, Iran University of Science and Technology, Narmak, 1684613114, Tehran, Iran.
Scientific reports
|March 14, 2025
概括
纸灰 (PSA) 有效地稳定了道路建设的弱砂土壤. 这种可持续的地质聚合物方法提高了土壤的强度,减少了永久变形,为基础设施开发提供了有前途的替代方案.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
背景情况:
- 软弱和不良分级的土壤在道路建设中存在重大挑战.
- 稳定这些土壤对于路面的寿命和性能至关重要.
- 使用废物材料,如纸灰 (PSA),提供了一个可持续的解决方案.
研究的目的:
- 研究纸灰 (PSA) 作为稳定沙土 (SP) 的地质聚合物废物材料的潜力.
- 改善弱土壤的机械性能,减少弱土壤的永久变形,以实现可持续的路面开发.
- 分析固化时间,PSA度和性激活剂对土壤稳定性的影响.
主要方法:
- 地质技术测试包括无限制压力强度 (UCS),扬模量 (Es),加利福尼亚轴承比率 (CBR) 和直接剪切测试 (DST).
- 使用扫描电子显微镜 (SEM) 和X射线衍射 (XRD) 进行微结构和化学矿物学分析.
- 开发一种实验室设备,以评估循环负荷下永久应变行为.
主要成果:
- 用PSA和酸盐 (Na2SiO3) 地聚合物处理的土壤样本显示出明显更高的UCS,Es和CBR值.
- 氧化 (NaOH) 溶液也提高了地质聚合物稳定土壤的强度参数.
- 地质聚合物稳定土壤在循环负荷下表现出对永久变形的改善抵抗力.
- SEM和XRD分析表明,N-A-S-H和C-A-S-H凝的形成以及活性水泥性波佐兰材料的存在.
结论:
- 纸灰 (PSA) 是一种有前途的废物,可以通过地质聚合稳定沙土.
- 地质聚合物稳定显著提高了弱土壤的机械性能和抗变形能力.
- 这种可持续的方法支持发展可持续和环保的道路基础设施.
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