密级配干法橡胶沥青混合料的道路性能和降噪特性

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-02-13 DOI:10.1016/j.conbuildmat.2025.140312

Pengzhao Guo , Chenchen Li , Weiwei Lu , Songtao Lv , Haihui Duan , Huaqing Lv , Longting Ding

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引用次数: 0

摘要

废轮胎橡胶颗粒具有提高道路耐久性和降低道路噪声的潜力。然而，目前对橡胶沥青混合料降噪性能的影响因素及降噪机理的研究还不是很深入，阻碍了低噪声路用性能与降噪功能的平衡设计。本研究旨在探讨干法橡胶颗粒添加对沥青混合料路用性能和降噪能力的影响，阐明干法橡胶沥青混合料的路用性能增强和降噪机理。本研究初步评价了不同橡胶颗粒含量（0 %、1 %、1.5 %和2 %）干法制备的石基沥青（SMA）混合料的高低温性能、水稳定性和疲劳性能，从微观角度阐明了干法橡胶颗粒的改性机理。通过动模量试验，探讨了橡胶颗粒掺量对沥青混合料阻尼特性的影响趋势。通过轮胎/路面噪声试验和吸声系数检测，分析了干法橡胶沥青混合料的吸声降噪性能。结果表明：随着橡胶颗粒含量的增加，沥青混合料的路用性能先提高后降低；当橡胶含量为1.5 %时，沥青混合料的路用性能最佳。橡胶颗粒与沥青之间形成的半连续相网结构可以提高沥青混合料的结构强度，从而改善其路用性能。橡胶颗粒增强了沥青混合料的吸声和阻尼能力，改善了沥青混合料的降噪性能。与0 %RSMA混合料相比，1.5 %RSMA（含1.5 wt%橡胶颗粒的SMA混合料）可将噪声降低至3 dB(A)，并且道路噪声水平与车速和雨水堵塞相关。

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Road performance and noise reduction characteristics of dense graded dry-process rubberised asphalt mixture

Waste tire rubber particles have potential to improve the road durability and reduce road noise. However, the current research on the influencing factors and noise reduction mechanisms of rubber asphalt mixtures' noise reduction performance is not very in-depth, which hinders the balanced design of low-noise road performance and noise reduction function. This research aims to investigate the effects of dry-process rubber particle addition on the road performance and noise reduction capabilities of asphalt mixtures, clarifying the road performance enhancement and noise reduction mechanism of dry-process rubber asphalt mixtures. This study initially evaluated the high- and low-temperature performance, water stability, and fatigue performance of Stone Matrix Asphalt (SMA) mixtures with varying rubber particle contents (0 %, 1 %, 1.5 %, and 2 %) prepared using the dry -process, and clarified the modification mechanism of dry-process rubber particles from a microscopic perspective. Furthermore, explored the trend of damping characteristics of asphalt mixtures with rubber particle content through dynamic modulus tests. The dry-process rubberised asphalt mixtures sound absorption and noise reduction performance were analyzed through tire/road noise test and absorption coefficient detection. The results show that the road performance of asphalt mixture first improves and then decreases with the increase of rubber particles content. The optimal road performance of asphalt mixture is achieved when the rubber content is 1.5 %. The formed semi continuous phase network structure between rubber particles and asphalt can enhance the structural strength of asphalt mixtures, thereby improving its road performance. Rubber particles enhance the sound absorption and damping capabilities of asphalt mixtures, improving their noise-reduction performance. The 1.5 %RSMA (SMA mixture with 1.5 wt% rubber particles by aggregate) can reduce noise to 3 dB(A) compared to the 0 %RSMA mixture, and road noise levels are correlated with vehicle speed and rainwater blockage.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.