评估含有抗剂的青混合物的机械和热力学性能,以防止低温破裂
Gholam Hossein Hamedi1, Mohammad Hosein Dehnad2, Amir Hossein Asadi3
1Department of Civil Engineering, University of Guilan, Rasht, Iran. hamedi@guilan.ac.ir.
Scientific reports
|July 18, 2025
概括
含有酸等抗剂的水溶液降低了热混合青 (HMA) 的低温性能. 添加热石可以提高在寒冷的气候下对热裂纹和潮湿损伤的抵抗力.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
背景情况:
- 由于表面结,热混合青 (HMA) 路面的性能在寒冷的气候下受到损害.
- 通常使用的抗剂,如酸 (NaOAc) 和化 (NaCl),可能会对HMA的耐用性产生负面影响.
- 石的吸收性质为这些不良影响提供了潜在的缓解.
研究的目的:
- 研究NaOAc和NaCl溶液对HMA的低温性能的影响.
- 评价热带石作为减轻抗剂损伤的添加剂的有效性.
- 分析不同聚合物和级对HMA电阻的影响.
主要方法:
- 表面自由能量 (SFE) 分析以量化 - 聚合物和 - 水相互作用.
- 半圆形曲 (SCB) 试验在-12°C和-22°C下进行,以评估断裂特性.
- 加入热带石 (1%和2%的麻重量) 和测试花岩/石灰岩聚合物和PG 58-22/PG 64-16麻.
主要成果:
- 防剂降低了高达8.5%的合物解能量 (DE),并增加了粘合剂失效潜力.
- SCB测试显示,抗剂降低了峰值负荷 (21%),断裂能量 (FE) (17%) 和断裂性 (FT) (17%) .
- NaOAc 显示出比 NaCl 更有害的效果;2% 焦化显著改善了 FE (10%),FT (14%) 和 DE (18%).
结论:
- 防剂显著损害HMA的低温性能和青聚合物的粘附性.
- 添加热带石有效地提高了HMA抵抗抗剂诱导的损伤.
- 与石灰岩聚合物的PG 58-22泥在潮湿条件下表现出优越的耐热裂纹的抗剂.
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