使用机械和热力学方法研究用纳米水合石灰修饰的HMA中排水特性对疲劳裂纹的影响
Zahra Rasouli1, Mehdi Mehdinazar2, Gholam Hossein Hamedi3
1Department of Civil Engineering, Qom University of Technology, Qom, Iran.
Scientific reports
|December 29, 2025
概括
表面流失的酸性加快了青疲劳裂,通过削弱青聚合物的键. 纳米水合石灰 (NHL) 提高了粘附性和抵抗潮湿损伤的能力,提高了青的耐用性.
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.
- 地质技术工程 地质技术工程
背景情况:
- 表面流失水分显著加快了青路面疲劳裂.
- 排水中的污染物,如灰尘和烟,改变pH值,加剧了青凝聚力和聚合物键损伤.
- 了解pH值对青疲劳的影响对于路面的耐用性至关重要.
研究的目的:
- 为了研究pH值对青混合物的疲劳裂纹的影响.
- 评估纳米水合石灰 (NHL) 作为修饰剂的有效性,以减轻潮湿引起的损害.
- 分析青成分与流水之间的热力学相互作用.
主要方法:
- 青混合物和青的机械测试,包括动态剪切流体计 (DSR) 和半圆形曲 (SCB) 测试.
- 表面自由能量 (SFE) 试验 (威廉米板和通用吸附装置) 来评估 - 聚合物相互作用.
- 在不同的pH条件下 (酸性/基性) 评估青样本.
主要成果:
- 酸性/性条件使合金分解能降低了10%,断裂性降低了20%.
- 环境条件增加了青的复杂模量和相角,提高了疲劳参数和裂纹概率.
- 纳米水合石灰 (NHL) 的应用改善了的SFE,增强了-聚合物粘附性和混合物性能,增加了24%的断裂性.
结论:
- 湿度引起的pH值变化通过削弱粘合键,显著降低了青对疲劳裂纹的抵抗力.
- 纳米水合石灰 (NHL) 有效地增强了聚合物的粘附性,并在潮湿,酸性/基性条件下改善了耐疲劳性.
- 结合PG 58-22青与0.4%的NHL和石灰岩,在酸性/基性环境中表现出优越的耐疲劳性.
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