使用活性废玻璃稳定石土壤,用于可持续的道路亚层应用
Roohollah Kalatehjari1, Elmira Khaksar Najafi2, Afshin Asadi3
1Built Environment Engineering Department, School of Future Environments, Auckland University of Technology, Auckland, 1010, New Zealand. r.kalatehjari@aut.ac.nz.
Scientific reports
|July 2, 2025
概括
这项研究开发了以玻璃为基础的活性水泥 (GBAAC) 来稳定新西兰石砂用于道路. GBAAC为化学稳定剂提供了一个可持续的替代品,显著提高了沙子的强度和性能特征.
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.
- 可持续建筑 可持续建筑
背景情况:
- 道路建设通常依赖于化学土壤稳定剂,导致环境问题.
- 在垃圾填埋场中积累的废玻璃 (WG) 构成了处理的重大挑战.
- 开发可持续的土壤稳定替代品对于基础设施发展至关重要.
研究的目的:
- 开发和优化基于玻璃的活性水泥 (GBAAC) 用于稳定新西兰石砂.
- 为了评估GBAAC稳定石灰砂的机械性能和微观结构特征.
- 评估在道路建设中使用GBAAC的可持续性好处.
主要方法:
- 使用 10 M KOH,系统优化激活器与前体比率 (A/P).
- 废玻璃 (WG) 前体的颗粒大小分布得到了优化.
- 进行了压力强度,微结构分析 (SEM/EDS) 和加利福尼亚轴承比率 (CBR) 测试.
主要成果:
- 在A/P=0.4时达到37.9MPa的最大压力强度,在65°C固化48小时后达到65MPa.
- 微观结构分析证实了/土--酸盐-酸盐凝的形成.
- 稳定GBAAC显著提高了石砂的CBR值,达到64.70% (重压缩).
- 一个衰老现象显示,强度超过了56天的初始值,特别是在升高的固化温度下.
结论:
- GBAAC是一种可行和可持续的材料,用于在道路建设中稳定新西兰石砂.
- 优化的GBAAC混合物表现出卓越的机械性能和耐用性.
- 在GBAAC中使用废玻璃减少了垃圾填埋垃圾,并为传统的土壤稳定方法提供了环保的替代方案.
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