基于克芯片测试的青粘合剂的低温性能评估指标研究
Meng Guo1,2, Chenlu Sun1,2, Yiqiao Wan3
1State Key Laboratory of Bridge Safety and Resilience, Beijing University of Technology, Beijing 100124, China.
Materials (Basel, Switzerland)
|March 27, 2025
概括
克牌芯片测试有效地评估了青粘合剂的破裂阻力. 拉力强度和最终拉力应变是可靠的指标,与低温性能的硬度模量和爬行率等传统措施相对应得很好.
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.
- 铺路工程工程 铺路工程
背景情况:
- 低温裂纹是青路面的主要故障模式.
- 克芯片测试模拟了青粘合膜状态,用于性能评估.
- 评估耐裂性和柔性对于路面的耐用性至关重要.
研究的目的:
- 分析了青粘合剂在各种老化水平下的低温裂纹耐阻的演变.
- 评估拉伸强度和最终拉伸应变作为性能指标的有效性.
- 建立克牌芯片测试结果与传统的低温性能指标之间的相关性.
主要方法:
- 利用克芯片测试来测量青粘合剂的抗拉强度和最终抗拉应变.
- 研究的乙烯-乙烯-乙烯 (SBS) 改性青和70#基青.
- 通过硬度模量,爬行率和格洛弗-罗威 (G-R) 参数进行了皮尔森相关性分析.
主要成果:
- 与70#基础青相比,SBS修改的青具有更高的抗拉强度和最终抗拉应变.
- 拉力强度随着老化而增加,而两种青类型的最终拉力强度都下降了.
- 拉力强度和最终拉力应变显示出与刚度模量和爬行率有很强的线性相关性 (R > 0.9),与G-R参数有较弱的相关性 (R > 0.7).
结论:
- 拉力强度和最终拉力应变是评估青粘合剂低温性能的有效和敏感指标.
- 这些参数可能会在性能评估中取代刚度模量和爬行率.
- 克牌芯片测试提供了一种有价值的方法,以了解在热应力下青粘合剂的行为.
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