评估不同预热条件下的掺混程度及其对再生热拌沥青性能的影响

IF 1.1 4区工程技术 Q3 ENGINEERING, CIVIL

Canadian Journal of Civil Engineering Pub Date : 2024-03-19 DOI:10.1139/cjce-2023-0389

Yining Zhang, Hengjin Chen

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引用次数: 0

摘要

本研究全面探讨了预热温度的作用，并量化了掺和度（DoB）对再生 HMA 性能的贡献。研究设计了五个实验组，包括无掺和组、全掺和组以及预热温度分别为 60 ºC、110 ºC 和 160 ºC 的三个实验组。结果发现，预热温度对再生 HMA 的 DoB 和性能有积极影响。当预热温度升高 50 ºC 时，可额外活化约 0.13%~0.2% 的 RAP 粘结剂，再生 HMA 的 TSR、剪切强度和断裂能可分别提高约 6%~8%、0.07 MPa~0.15 MPa 和 304.2 J-m2~335.4 J-m2。此外，研究结果表明，在预热温度为 60 ºC 时设计的再生混合料的性能接近于无掺料组，而在预热温度为 160 ºC 时设计的混合料的性能可达到全掺料组。

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Evaluation of degree of blending and its effect to performance of recycled hot-mix asphalt under different preheating conditions

This research comprehensively explored the function of preheating temperature and quantified the contribution of degree of blending (DoB) to performance of recycled HMAs. Five groups were designed, including no blending group, full blending group, and three experimental groups at preheating temperatures of 60 ºC, 110 ºC, and 160 ºC. It can be found that the preheating temperature played a positive impact on DoB and performance of recycled HMAs. As the preheating temperature increased by 50 ºC, about 0.13%~0.2% RAP binder can be additionally activated, and TSR, shear strength, and fracture energy of recycled HMAs can improve by around 6%~8%, 0.07 MPa~0.15 MPa, and 304.2 J•m2~335.4 J•m2, respectively. Moreover, the results showed that the performance of recycled mixes designed at preheating temperature of 60 ºC closed to that of no blending group, while the mixes designed at preheating temperature of 160 ºC can reach to that of full blending group.

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来源期刊

Canadian Journal of Civil Engineering 工程技术-工程：土木

CiteScore

3.00

自引率

7.10%

发文量

105

审稿时长

14 months

期刊介绍： The Canadian Journal of Civil Engineering is the official journal of the Canadian Society for Civil Engineering. It contains articles on environmental engineering, hydrotechnical engineering, structural engineering, construction engineering, engineering mechanics, engineering materials, and history of civil engineering. Contributors include recognized researchers and practitioners in industry, government, and academia. New developments in engineering design and construction are also featured.