含有尿素-甲微囊的矿混合物的道路性能和自我愈合特性
Hongliang Zhang1, Tong Yao1, Fenglei Cheng1,2
1Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang'an University, Xi'an 710064, China.
Materials (Basel, Switzerland)
|February 24, 2024
概括
尿素甲微囊 (UFMs) 增强了矿混合物.
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.
- 聚合物化学 聚合物化学
背景情况:
- 尿素甲 (Urea-formaldehyde,简称UF) 是自愈微的常见外材料.
- 尿素甲微囊 (UFMs) 对矿混合物的道路性能和愈合灵敏性的特定影响尚不清楚.
研究的目的:
- 为了研究含有UFM的青混合物的道路性能.
- 评估UFM修改的矿混合物的自我修复能力.
- 为了确定损伤程度,愈合时间和温度对UFM愈合效率的影响.
主要方法:
- 通过现场聚合 (ISP) 制备UFM.
- 使用轮跟踪,浸泡马歇尔,冷解,低温曲和三点曲疲劳测试来评估矿混合物的性能.
- 自愈性能的分析:对损伤的敏感性,持续时间和温度.
主要成果:
- 含有3%重量的UFM显著改善了高温稳定性 (动态稳定性+16.5%) 和耐疲劳性 (耐疲劳性+10%).
- 添加UFM降低了热裂纹阻力 (曲拉伸强度 -3.7%,拉伸强度 -10.1%) 并没有显著提高湿度易受性.
- 最大愈合率的改善率约为9%,愈合时间和温度对性能产生积极影响,而损伤程度则对性能产生负面影响.
结论:
- UFM可以提高矿混合物的特定性能方面,特别是高温稳定性和耐疲劳性.
- 矿混合物中UFM的自我愈合效率对损伤水平,愈合时间和温度都很敏感.
- 需要进一步的研究来优化UFM的使用,并减轻对热裂解电阻的负面影响.
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