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Asphalt Binder Property and Adaptability Based on PG Grading in Severe Cold and High Altitude Regions

花匠小妙招
2024-11-08 21:36

为解决高寒高海拔地区沥青结合料性能不足的问题,结合京藏高速公路格尔木至那曲段地形地貌与气候变化特点,依托沿线多个气象观测站的30 a气象资料,对所处地貌、气候特征、海拔、交通荷载量等相关数据进行统计学分析、计算,探索高海拔大温差地区沥青胶结料PG分级方法的适应性。结果表明:基于青藏地区现场监测结果对LTPP高温温度计算模型进行修正,提出了更适合高寒高海拔地区沥青结合料高温温度计算公式,提高了沥青高温性能指标计算公式的可靠性;在京藏高速公路格拉段对沥青胶结料的PG分级建议值最高达到PG76-22,在高寒高海拔地区应充分考虑海拔增高对沥青低温抗裂性能的影响,将低温等级提高1~2级;在那曲地区建议使用SBRⅡ-A改性沥青,在格尔木地区建议使用SBS改性沥青;在沱沱河、五道梁地区,建议开发抗紫外温拌改性沥青,采用更高标号的基质沥青对沥青进行SBS/SBR复合改性,并进行适用性研究。本次研究成果为高寒高海拔地区沥青结合料的材料开发技术、施工工艺提升及工程化应用提供一定参考,有利于提高沥青路面修建质量,延长使用寿命。

Abstract

To solve the problem of insufficient performance of asphalt in the severe cold and high altitude regions, based on the characteristics of topography, geomorphology and climate, and relying on the 30-year meteorological data observed by several meteorological observation stations along the Golmud-Nagqu section of Beijing-Tibet expressway, the statistical analysis and calculation were carried out on the geomorphology, climatic characteristics, altitude, and traffic load data. The adaptability of PG grading method for asphalt binder in high-altitude regions with large temperature differences was explored. The result indicates that the LTPP high temperature calculation model is modified based on the field monitoring results in Qinghai-Tibet region. The formula for calculating high temperature of asphalt binder in this region is proposed to improve the reliability of the formula. In Golmud-Nagqu section, the recommended PG classification value of asphalt binder reaches the highest PG 76-22. In the severe cold and high altitude region, the effect of elevation increase on low temperature cracking resistance of asphalt should be fully considered. The low temperature grade should be increased by 1 to 2 grades. It is recommended to use SBRⅡ-A modified asphalt in Nagqu area, and to use SBS modified asphalt in Golmud area. In Tuotuohe and Wudaoliang areas, it is recommended to develop UV-resistant modified asphalt, and use higher grade base asphalt to carry out SBS/SBR composite modification on asphalt for its applicability study. The study result provides basis for the material development technology, construction technology improvement and engineering application of asphalt binder in severe cold and high altitude regions. It is conducive to improving the construction quality of asphalt pavement, and extending the service life.

关键词

道路工程 /高低温性能 /PG分级 /沥青 /公路战略研究计划(SHRP){{custom_keyword}} /

Key words

road engineering /high and low temperature properties /PG grading /asphalt /strategic highway research program(SHRP){{custom_keyword}} /

参考文献

[1] 邵华. 西藏大温差地区沥青路面结构适应性与耐久性探讨[J]. 中国公路, 2023(16): 185-187. SHAO Hua. Discussion on Structural Adaptability and Durability of Asphalt Pavement in Tibet Area with Large Temperature Difference [J]. China Highway, 2023(16): 185-187.
[2] 崔宇阳. 藏区沥青紫外老化行为与抗老化研究 [D]. 重庆: 重庆交通大学, 2023. CUI Yu-yang. Study on Ultraviolet Aging Behavior and Antiaging of Asphalt in Tibetan Area [D]. Chongqing: Chongqing Jiaotong University, 2023.
[3] 窦明健, 胡长顺, 多吉罗布, 等. 青藏公路路面病害成因分析 [J]. 冰川冻土, 2003, 25(4): 439-444. DOU Ming-jian, HU Chang-shun, DUOJI Luo-bu, et al. Analysis on Surface Troubles of the Qinghai-Tibet Highway [J]. Journal of Glaciology and Geocryology, 2003, 25(4): 439-444.
[4] 朱自成. 高寒高海拔地区沥青路面病害机理与防治技术研究 [D]. 西安: 长安大学, 2018. ZHU Zi-cheng. Study on Disease Mechanism and Control Technology of Asphalt Pavement in High Alpine and High Altitude Area [D]. Xi’an: Chang’an University, 2018.
[5] 司伟, 张博文, 杨若聪, 等. 青藏高寒区基于真实环境冻融作用的沥青混合料冻融疲劳破坏表征[J]. 长安大学学报(自然科学版), 2023, 43(3): 11-21. SI Wei, ZHANG Bo-wen, YANG Ruo-cong, et al. Characterization Analysis of Freezing-thawing Fatigue of Asphalt Mixtures Freeze-thaw Action in Real Environment in Qinghai-Tibet Plateau Cold Regions [J]. Journal of Chang’an University (Natural Science Edition), 2023, 43(3): 11-21.
[6] 尹国宏, 张平, 李博, 等. 重冻地区组合式基层沥青路面温度应力响应研究 [J]. 市政技术, 2023, 41(10): 94-100. YIN Guo-hong, ZHANG Ping, LI Bo, et al. Study on Temperature Stress Response of Composite Asphalt Pavement in Heavy Frozen Areas [J]. Municipal Engineering Technology, 2023, 41(10): 94-100.
[7] 周水文, 时敬涛, 张蓉, 等. 高寒高海拔地区改性沥青高低温性能研究 [J]. 公路工程, 2017, 42(6): 199-205, 212. ZHOU Shui-wen, SHI Jing-tao, ZHANG Rong, et al. Research on High-and-low Temperature Properties of Modified Asphalt in Alpine and High Altitude Region [J]. Highway Engineering, 2017, 42(6): 199-205, 212.
[8] 杨凯. 高寒高海拔地区SBS/SBR复合改性沥青制备及性能评价研究 [D]. 西安: 长安大学, 2017. YANG Kai. Study on Preparation and Performance Evaluation of SBS/SBR Composite Modified Asphalt for Extremely Cold and High Altitude Area[D]. Xi’an: Chang’an University, 2017.
[9] 肖琪, 吴萍. 分析江西省高速公路沥青路面温度特征与沥青PG分级[J]. 江西建材, 2018(4): 150-151. XIAO Qi, WU Ping. Analyzation of Temperature Characteristics and PG Classification of Expressway Asphalt Pavement in Jiangxi Province [J]. Jiangxi Building Materials, 2018(4): 150-151.
[10] 李萍. 吉林省沥青混合料高低温设计指标统一性研究[D]. 长春: 吉林大学, 2018. LI Ping. Research on Unity of Asphalt Mixture Design Index Under High and Low Temperature in Jilin Province [D]. Changchun: Jilin University, 2018.
[11] 唐佑绵, 刘书君. 新疆地区沥青路面性能温度分区与沥青结合料PG等级研究[J]. 石油沥青, 2017, 31(1): 31-35. TANG You-mian, LIU Shu-jun. Research on the Temperature Field Division of Asphalt Pavement Performance and the Performance Grade of Asphalt Binder in Xinjiang Area [J]. Petroleum Asphalt, 2017, 31(1): 31-35.
[12] 吕骄阳, 权磊. 西藏地区公路沥青路面路用性能气候分区及PG分级 [J]. 公路交通科技, 2017, 34(9): 1-7. LÜ Jiao-yang, QUAN Lei. Climate Zoning and PG Grading for Highway Asphalt Pavement Performance in Tibet Area [J]. Journal of Highway and Transportation Research and Development, 2017, 34(9): 1-7.
[13] MAHBOUB K, LITTLE D N. An Improved Asphalt Concrete Mix Design Procedure [J]. Journal of Association of Asphalt Paving Technologists, 1990(26): 12-14.
[14] KENNEDY T W, HUBER G A, HARRUGAN E T, et al. Superior Performing Asphalt Pavements: The Product of the SHRP Asphalt Research Program, SHRP-A-410 [R]. Washington, D. C.: National Research Council, 1994.
[15] 阳恩慧, 李雨枭, 罗蕾, 等. 季节性冻土地区隧间路段沥青路面温度场研究 [J]. 市政技术, 2023, 41(6): 1-9. YANG En-hui, LI Yu-xiao, LUO Lei, et al. Study on Temperature Field of Asphalt Pavement Between Tunnels in Seasonal Frozen Region [J]. Municipal Engineering Technology, 2023, 41(6): 1-9.
[16] 商淑杰, 张晓萌, 徐全鹏, 等. 全厚式沥青路面结构温度场全年变化规律研究[J]. 山东交通科技, 2023(3): 5-9, 18. SHANG Shu-jie, ZHANG Xiao-meng, XU Quan-peng, et al. Study on the Year-round Variation of Temperature Field of Full Depth Asphalt Pavement [J]. Shandong Jiaotong Keji, 2023(3): 5-9, 18.
[17] 黄乔森. 广东地区高PG等级改性沥青研制及混合料性能研究[D]. 西安: 长安大学, 2019. HUANG Qiao-sen. Development of High PG Grade Modified Asphalt and Study on Properties of Mixture in Guangdong Province [D]. Xi’an: Chang’an University, 2019.
[18] 徐霈, 王祺, 张宏, 等. SBS/SBR改性沥青PG分级及其在西藏地区的适用性研究 [J]. 公路交通技术, 2018, 34(6): 45-49. XU Pei, WANG Qi, ZHANG Hong, et al. The PG Grade of SBS/SBR Modified Asphalt and Its Adaptability in Tibet Area [J]. Technology of Highway and Transport, 2018, 34(6): 45-49.
[19] 李郑. 多聚磷酸与橡胶粉复合改性沥青及其混合料在西藏地区的应用研究 [J]. 公路工程, 2016, 41(1): 230-235. LI Zheng. Study on Application of Polyphosphate and Rubber Composite Modified Asphalt and Its Mixture in The Tibet Region [J]. Highway Engineering, 2016, 41(1): 230-235.
[20] 苏江, 田荣燕, 唐靖武, 等. 西藏地区废胎橡胶粉改性沥青的应用前景研究[J]. 河南科技, 2019(1): 98-101. SU Jiang, TIAN Rong-yan, TANG Jing-wu, et al. Application Prospect of Waste Rubber Powder Modified Asphalt in Tibet [J]. Henan Science and Technology, 2019(1): 98-101.
[21] 杨光, 申爱琴, 陈志国, 等.季冻区橡胶粉与SBS复合改性沥青混合料性能及改性机理[J]. 长安大学学报(自然科学版), 2015, 35(6): 6-15. YANG Guang, SHEN Ai-qin, CHEN Zhi-guo, et al. Pavement Performance and Modified Mechanism of Rubber Powder and SBS Compound Modified Asphalt Mixture in Seasonal Freezing Region [J]. Journal of Chang’an University (Natural Science Edition), 2015, 35(6): 6-15.