泡沫沥青冷再生混合料MMLS3试验轮辙曲线特征及影响机理
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摘要
对泡沫沥青冷再生混合料进行常温条件下的MMLS3加速加载试验,研究泡沫沥青冷再生混合料的长期使用性能,探讨泡沫沥青冷再生混合料的车辙变深度、变形速率及横断面轮辙曲线特征,给出泡沫沥青冷再生混合料车辙深度随加载次数的变化趋势,并对不同加载次数下轮迹处MMLS3试件进行X-ray无损扫描,分析不同加载次数下泡沫沥青冷再生混合料的空隙率分布特征及粗集料运动规律,揭示泡沫沥青冷再生混合料的疲劳损伤规律。研究结果表明:对于未掺加水泥的泡沫沥青冷再生混合料试件,轮迹处车辙沿横断面分布呈U形;掺加1%～2.5%水泥后,泡沫沥青冷再生混合料试件横断面车辙分布呈W形,可采用车辙深度R_(DD)=AN~B预估不同加载次数N下的车辙深度发展规律;MMLS3加载试验过程中泡沫沥青冷再生混合料车辙发展规律可分为3个阶段,即压密阶段、蠕变稳定阶段、剪切破坏阶段;重复疲劳荷载作用下轮辙变形主要来源于泡沫沥青砂浆压密变形和集料受荷载作用产生的竖向位移及粗集料自身由不稳定状态转变为"平躺"状态所发生的水平转动位移,粗集料取向角随加载次数增大呈指数函数关系减小。
The long-term performance of foam asphalt cold recycled mixture was studied by MMLS3 accelerated loading under the condition of room temperature. The effects of the asphalt cold recycled mixture on the rutting depth, deformation rate, and cross section are investigated. The characteristics of the rutting curve of the foamed asphalt cold regenerated mixture are analyzed, and X-ray non-destructive scanning of the specimen at the track is carried out. The effects of different times of loading on the asphalt cold recycled mixture are investigated. The porosity distribution and the law of coarse aggregate movement reveal the fatigue damage law of foam asphalt cold regenerated mixture. The results show that the rutting of the trough is not U-shaped along the cross section, and the regenerated mixture of 1%-2.5% cement is used as the cold recycled mixture of foam asphalt. Under different loading times(N), R_(DD)= AN~B can be used to estimate the rutting development of foam asphalt in the MMLS3 loading test. This law can be divided into the compaction stage, creep stabilization stage, and shear failure stage. The torsional deformation under the repeated fatigue load is mainly due to the vertical displacement and coarse aggregate produced by the compression deformation of the foam asphalt mortar and the load. The horizontal rotation of the coarse aggregate is changed from the unstable state to the "flat" state, and the orientation angle of the coarse aggregate decreases exponentially with the increase in loading time.
The long-term performance of foam asphalt cold recycled mixture was studied by MMLS3 accelerated loading under the condition of room temperature. The effects of the asphalt cold recycled mixture on the rutting depth, deformation rate, and cross section are investigated. The characteristics of the rutting curve of the foamed asphalt cold regenerated mixture are analyzed, and X-ray non-destructive scanning of the specimen at the track is carried out. The effects of different times of loading on the asphalt cold recycled mixture are investigated. The porosity distribution and the law of coarse aggregate movement reveal the fatigue damage law of foam asphalt cold regenerated mixture. The results show that the rutting of the trough is not U-shaped along the cross section, and the regenerated mixture of 1%-2.5% cement is used as the cold recycled mixture of foam asphalt. Under different loading times(N), R_(DD)= AN~B can be used to estimate the rutting development of foam asphalt in the MMLS3 loading test. This law can be divided into the compaction stage, creep stabilization stage, and shear failure stage. The torsional deformation under the repeated fatigue load is mainly due to the vertical displacement and coarse aggregate produced by the compression deformation of the foam asphalt mortar and the load. The horizontal rotation of the coarse aggregate is changed from the unstable state to the "flat" state, and the orientation angle of the coarse aggregate decreases exponentially with the increase in loading time.
引文
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[14] 肖倩,张蕾.路用粗集料形态可视化识别及其评价方法综述[J].公路交通科技,2016,33(5):46-51. XIAO Qian, ZHANG Lei. A Review of Visual Identification and Evaluation of Coarse Aggregate of Road Pavement [J]. Journal of Highway and Transportation Research and Development, 2016, 33 (5): 46-51.
[15] 王宏,刘锋,徐建荣,等.乳化沥青冷再生混合养生方式研究[J].武汉理工大学学报:交通科学与工程版, 2015,39(3):641-646. WANG Hong, LIU Feng, ZHANG Bao-yong, et al. Research on Curing Methods of Emulsified Asphalt Cold Recycled Mixture [J]. Journal of Wuhan University of Technology: Transportation Science & Engineering, 2015, 39 (3): 641-646.
[16] 权登州,乳化沥青冷再生混合料技术性能研究[D].西安:长安大学,2009. QUAN Deng-zhou. Study on Performance of Cold Recycling Mixture with Emulsified Asphalt [D]. Xi'an: Chang'an University, 2009.
[17] 申爱琴,郭寅川,车飞,等.基于MMLS3试验的混合料离析对沥青路面长期高温性能的影响[J]. 中国公路学报, 2012, 25(3): 80-86. SHEN Ai-qin, GUO Yin-chuan, CHE Fei, et al. Influence of Asphalt Mixture Segregation on Long-term High Temperature Performance of Asphalt Pavement Based on MMLS3 Test [J]. China Journal of Highway and Transport, 2012, 25 (3): 80-86.
[18] 万成,徐科,张肖宁,等.基于彩色数字图像技术的粗集料松方密实方法选择[J].公路交通科技, 2017,34(2):56-61. WAN Cheng, XU Ke, ZHANG Xiao-ning, et al. Selection of Coarse Aggregate Loose Square Compaction Method Based on Color Digital Image Technology [J]. Journal of Highway and Transportation Research and Development, 2017, 34 (2): 56-61.
[19] 郭乃胜,YOU Z P,谭忆秋,等.基于CT技术的沥青混合料空隙率预测方法[J].中国公路学报,2016,29(8):12-21,42. GUO Nai-sheng, YOU Z P, TAN Yi-qiu, et al. Prediction Method on Volume of Air Voids of Asphalt Mixtures Based on CT Technique [J]. China Journal of Highway and Transport, 2016, 29 (8): 12-21, 42.
[20] 肖鑫,张肖宁.基于工业CT的排水沥青混合料连通空隙特征研究[J].中国公路学报,2016,29(8):22-28. XIAO Xin, ZHANG Xiao-ning. Research on Connecting Void Characteristics of Porous Asphalt Mixture Based on Industrial CT [J]. China Journal of Highway and Transport, 2016, 29 (8): 22-28.
[21] 郭乃胜,尤占平,谭忆秋,等.基于CT技术的沥青混合料均匀性评价方法[J].中国公路学报,2017,30(1):1-9,55. GUO Nai-sheng, YOU Zhan-ping, TAN Yi-qiu, et al. Evaluation Method for Homogeneity of Asphalt Mixtures Based on CT Technique(in English) [J]. China Journal of Highway and Transport, 2017, 30 (1): 1-9, 55.
[2] NIAZI Y, JALI L M. Effect of Portland Cement and Lime Additives on Properties of Cold In-place Recycled Mixtures with Asphalt Emulsion [J]. Construction and Building Materials, 2009 (23): 1338-1343.
[3] 高磊,倪富健,罗海龙.乳化沥青冷再生混合料的透水性与空隙特征[J].东南大学学报:自然科学版,2015,45(3):581-585. GAO Lei, NI Fu-jian, LUO Hai-long. Permeability and Air Voids of Cold Recycled Mixtures with Asphalt Emulsion [J]. Journal of Southeast University: Natural Science Edition, 2015, 45 (3): 581-585.
[4] 王宏.不同水泥掺量乳化沥青冷再生混合料细微观空隙分布特征[J].公路交通科技,2016,33(7):27-34. WANG Hong. Meso-microscopic Void Distribution Characteristics of Emulsified Asphalt Cold Recycled Mixture with Different Cement Contents [J]. Journal of Highway and Transportation Research and Development, 2016, 33 (7): 27-34.
[5] 徐金枝.泡沫沥青及泡沫沥青冷再生混合料技术性能研究[D].西安:长安大学,2007. XU Jin-zhi. Study on the Technology Characteristics of Foamed Asphalt and Foamed Asphalt Cold Recycled Mixture [D]. Xi'an: Chang'an University, 2014.
[6] 王宏,刘锋.不同成型方式泡沫沥青冷再生混合料细微观结构性能研究[J].公路交通科技,2016,33(2):19-27. WANG Hong, LIU Feng. Research of Microstructure Performance of Foamed Asphalt Cold Recycled Mixture in Different Compaction Methods [J]. Journal of Highway and Transportation Research and Development, 2016, 33 (2): 19-27.
[7] 李智,徐伟,王少怀,等.沥青混合料压实状态的数字图像分析[J].岩土工程学报.2002,24(4):451-455. LI Zhi, XU Wei, WANG Shao-huai, et al. Digital Image Analysis of Compacted Asphalt Mixture [J] Chinese Journal of Geotechnical Engineering, 2002, 24 (4): 451-455.
[8] 李智.基于数字图像处理技术的沥青混合料体积组成特性分析[D].哈尔滨:哈尔滨工业大学, 2002. LI Zhi. Analysis of Volume Composition of Asphalt Mixture Based on Digital Image Processing Technology [D]. Harbin:Harbin Institute of Technology, 2002.
[9] 姚秋玲.基于数字图像处理技术的沥青混合料组成特性研究[D].西安:长安大学,2004. YAO Qiu-ling. Research on Composition Characteristics of Asphalt Mixture Based on Digital Image Processing Technology [D]. Xi'an: Chang'an University, 2004.
[10] 王宏,刘锋,张葆永,等.不同养生温度乳化沥青冷再生混合料空隙分布特征[J].武汉理工大学学报:交通科学与工程版,2015,39(2):388-392. WANG Hong, LIU Feng, ZHANG Bao-yong, et al. Voids Distribution of Emulsified Asphalt Cold Recycled Mixture with Different Curing Temperature [J]. Journal of Wuhan University of Technology: Transportation Science & Engineering, 2015, 39 (2): 388-392.
[11] BIRGISSON B, SORANAKOM C, NAPIER J, et al. Microstructure and Fracture in Asphalt Mixtures Using a Boundary Element Approach [J]. Journal of Materials in Civil Engineering, 2004, 16 (2): 116-121.
[12] MASAD E, MUHUNTHAN B, SHASHIDHAR N, et al. Internal Structure Characterization of Asphalt Concrete Using Image Analysis [J]. Journal of Computing in Civil Engineering, 1999, 13 (2): 88-95.
[13] 李艳春,孟岩,周骊巍,等.沥青混合料空隙率影响因素的灰关联分析[J].中国公路学报,2007,20(1)30-34. LI Yan-chun, MENG Yan, ZHOU Li-wei, et al. Grey Relation Degree Analysis of Influence Factors on Asphalt Mixtures Voids [J]. China Journal of Highway and Transport, 2007, 20 (1): 30-34.
[14] 肖倩,张蕾.路用粗集料形态可视化识别及其评价方法综述[J].公路交通科技,2016,33(5):46-51. XIAO Qian, ZHANG Lei. A Review of Visual Identification and Evaluation of Coarse Aggregate of Road Pavement [J]. Journal of Highway and Transportation Research and Development, 2016, 33 (5): 46-51.
[15] 王宏,刘锋,徐建荣,等.乳化沥青冷再生混合养生方式研究[J].武汉理工大学学报:交通科学与工程版, 2015,39(3):641-646. WANG Hong, LIU Feng, ZHANG Bao-yong, et al. Research on Curing Methods of Emulsified Asphalt Cold Recycled Mixture [J]. Journal of Wuhan University of Technology: Transportation Science & Engineering, 2015, 39 (3): 641-646.
[16] 权登州,乳化沥青冷再生混合料技术性能研究[D].西安:长安大学,2009. QUAN Deng-zhou. Study on Performance of Cold Recycling Mixture with Emulsified Asphalt [D]. Xi'an: Chang'an University, 2009.
[17] 申爱琴,郭寅川,车飞,等.基于MMLS3试验的混合料离析对沥青路面长期高温性能的影响[J]. 中国公路学报, 2012, 25(3): 80-86. SHEN Ai-qin, GUO Yin-chuan, CHE Fei, et al. Influence of Asphalt Mixture Segregation on Long-term High Temperature Performance of Asphalt Pavement Based on MMLS3 Test [J]. China Journal of Highway and Transport, 2012, 25 (3): 80-86.
[18] 万成,徐科,张肖宁,等.基于彩色数字图像技术的粗集料松方密实方法选择[J].公路交通科技, 2017,34(2):56-61. WAN Cheng, XU Ke, ZHANG Xiao-ning, et al. Selection of Coarse Aggregate Loose Square Compaction Method Based on Color Digital Image Technology [J]. Journal of Highway and Transportation Research and Development, 2017, 34 (2): 56-61.
[19] 郭乃胜,YOU Z P,谭忆秋,等.基于CT技术的沥青混合料空隙率预测方法[J].中国公路学报,2016,29(8):12-21,42. GUO Nai-sheng, YOU Z P, TAN Yi-qiu, et al. Prediction Method on Volume of Air Voids of Asphalt Mixtures Based on CT Technique [J]. China Journal of Highway and Transport, 2016, 29 (8): 12-21, 42.
[20] 肖鑫,张肖宁.基于工业CT的排水沥青混合料连通空隙特征研究[J].中国公路学报,2016,29(8):22-28. XIAO Xin, ZHANG Xiao-ning. Research on Connecting Void Characteristics of Porous Asphalt Mixture Based on Industrial CT [J]. China Journal of Highway and Transport, 2016, 29 (8): 22-28.
[21] 郭乃胜,尤占平,谭忆秋,等.基于CT技术的沥青混合料均匀性评价方法[J].中国公路学报,2017,30(1):1-9,55. GUO Nai-sheng, YOU Zhan-ping, TAN Yi-qiu, et al. Evaluation Method for Homogeneity of Asphalt Mixtures Based on CT Technique(in English) [J]. China Journal of Highway and Transport, 2017, 30 (1): 1-9, 55.