在不同的pH湿度条件下,青混合物与污水泥灰的低温特性
Amir Hossein Asadi1, Gholam Hossein Hamedi1, Alireza Azarhoosh2
1Department of Civil Engineering, University of Guilan, PO Box: 3756, Rasht, Iran.
Scientific reports
|February 27, 2026
概括
这项研究表明,污水污泥灰 (SSA) 提高了热混合青 (HMA) 的性能. 用SSA取代矿物聚合物可以提高断裂能量和性,特别是在酸性水分条件下.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 土木工程 土木工程是指土木工程.
背景情况:
- 工业废物,特别是市政废水处理污泥,带来了环境和经济挑战.
- 可持续的道路基础设施发展需要有效的材料回收策略.
- 污水污泥灰 (SSA) 是青混合物的潜在回收材料.
研究的目的:
- 评估使用污水泥灰 (SSA) 作为热混合青 (HMA) 中精细矿物聚合物的替代品的影响.
- 在不同的pH湿度条件下评估含有SSA的HMA在低温性能.
- 为了确定SSA的最佳替代水平,以提高青混合物的性能.
主要方法:
- 污水污泥灰 (SSA) 在25%,50%,75%和100%的剂量取代了细花岩.
- 杆和HMA标本进行了拉力强度 (APS/CPS) 和半圆形曲 (SCB) 测试.
- 测试是在受控的湿度条件下进行的,pH值在5到9之间.
主要成果:
- 酸性湿度条件显著降低了对照样本中的断裂能量 (FE) 和断裂性 (FT) (约. 减少了40%).
- 纳入SSA增强了粘附和凝聚力,平均增加了60%的FE和FT.
- 较高的SSA替代水平 (≥75%) 显示了FE,FT,APS和CPS在统计学上显著的改善.
结论:
- 污水污泥灰 (SSA) 有效地减轻了湿度对HMA性能的有害影响.
- 在各种pH条件下,100%的SSA替代物表现出最佳的骨折和粘合性/凝聚性特性.
- 在HMA中使用SSA为道路建设中的废物回收提供了一个可持续的解决方案.
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