|Table of Contents|

[1] Wu Jiantao, Qiu Lei, Jiao Yan, Liu Quan, et al. Identification and analysis of mixing-induced homogeneity in reclaimed asphalt pavement materials [J]. Journal of Southeast University (English Edition), 2024, 40 (2): 193-202. [doi:10.3969/j.issn.1003-7985.2024.02.010]
Copy

Identification and analysis of mixing-induced homogeneity in reclaimed asphalt pavement materials()
再生沥青混合料拌和均匀性识别与机理分析
Share：

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
40
Issue:
2024 2
Page:
193-202
Research Field:
Traffic and Transportation Engineering
Publishing date:
2024-06-13

Info

Title:
Identification and analysis of mixing-induced homogeneity in reclaimed asphalt pavement materials
再生沥青混合料拌和均匀性识别与机理分析
Author(s):
Wu Jiantao1, Qiu Lei1, Jiao Yan2, Liu Quan1, Jing Chao3, Zhu Jinlong4
1College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China
2Hebei Transportation Planning and Design Research Institute Co., Shijiazhuang 050000, China
3Hebei Province Engineering Research Center for Harmless Synergistic Treatment andRecycling of Municipal Solid Waste, Yanshan University, Qinhuangdao 066000, China
4Shanghai City Construction Municipal(Engineering)Group Co., Shanghai 200131, China
吴建涛1, 邱磊1, 焦岩2, 刘泉1, 敬超3, 朱金龙4
1河海大学土木与交通学院, 南京 210098; 2河北省交通规划设计研究院有限公司, 石家庄 050000; 3燕山大学河北省城市固体废物无害化协同处理与循环利用工程技术研究中心, 秦皇岛 066000; 4上海城建市政工程(集团)有限公司, 上海 200131
Keywords:
reclaimed asphalt pavement(RAP);  mixing-induced homogeneity;  image segmentation;  homogeneity index
再生沥青混合料;  拌和均匀性;  图像分割;  均匀性指标
PACS:
U416.26
DOI:
10.3969/j.issn.1003-7985.2024.02.010
Abstract:
Asphalt mixtures were prepared in the laboratory using reclaimed asphalt pavement(RAP)at a 40% mass concentration to investigate the homogeneity characteristics of RAP during the mixing process, taking into account the mixing duration and aging rate. Specifically, titanium dioxide powder was incorporated into RAP binders as an identification tracer. Homogeneity indices were subsequently established to evaluate the homogeneity characteristics of asphalt mixtures. Computed tomography(CT)was used to create digital images of asphalt mixtures, and Mimics software was used to identify the components. Finally, a homogeneity evaluation system was established to assess the uniformity of both the components and RAP agglomerates. The results indicate that homogeneity is mostly influenced by the distribution of coarse aggregates, followed by asphalt binders and air voids. Homogeneity improvement is hindered by the formation of new agglomerates during the mixing process, whereas it is increased by prolonging the mixing time. A homogeneity evaluation system based on components and agglomerates can effectively reveal the principles governing homogeneity characteristics and provide a reference for the construction of high-quality recycled asphalt pavement.
为探究再生沥青混合料(RAP)拌和过程中的均匀性特征变化规律, 考虑拌和时间和RAP料老化程度因素, 选择二氧化钛粉末作为RAP料示踪剂, 在实验室内制备掺有质量分数40%RAP料的再生沥青混合料, 并建立均匀性指标评价再生沥青混合料均匀性特征.通过计算机断层扫描技术(CT)获取沥青混合料数字图像, 并对图像进行基于Mimics软件的组分识别, 最终建立关于组分和结团的均匀性评价体系.结果表明:粗集料分布情况对混合料拌和均匀性的影响最大, 其次是沥青和孔隙分布情况;延长搅拌时间有利于提高再生沥青混合料的拌和均匀性, 然而拌和过程中形成的新结团又会阻碍拌和均匀性的改善.考虑组分和结团的均匀性评价体系可以有效揭示再生沥青混合料拌和均匀性特征变化规律, 为建设高质量再生沥青路面提供参考.

References:

[1] Tarsi G, Tataranni P, Sangiorgi C. The challenges of using reclaimed asphalt pavement for new asphalt mixtures: A review[J].Materials, 2020, 13(18): 4052. DOI: 10.3390/ma13184052.
[2] Valdés G, Pérez-Jiménez F, Miró R, et al.Experimental study of recycled asphalt mixtures with high percentages of reclaimed asphalt pavement(RAP)[J]. Construction and Building Materials, 2011, 25(3): 1289-1297. DOI: 10.1016/j.conbuildmat.2010.09.016.
[3] Wang J, Qin Y C, Xu J, et al. In-situ characterization of microscale mechanical properties of interface between cement emulsified asphalt and aged asphalt[J]. Journal of Southeast University(Natural Science Edition), 2022, 52(2): 288-298. DOI:10.3969/j.issn.1001-0505.2022.02.011. (in Chinese)
[4] Cavalli M C, Griffa M, Bressi S, et al.Multiscale imaging and characterization of the effect of mixing temperature on asphalt concrete containing recycled components[J]. Journal of Microscopy, 2016, 264(1): 22-33. DOI: 10.1111/jmi.12412.
[5] Xu J Z, Hao P W, Zhang D P, et al. Investigation of reclaimed asphalt pavement blending efficiency based on micro-mechanical properties of layered asphalt binders[J]. Construction and Building Materials, 2018, 163: 390-401. DOI: 10.1016/j.conbuildmat.2017.12.030.
[6] Elkashef M, Hung S S, Harvey J T, et al. Assessing the use of blending charts to estimate the allowable reclaimed asphalt pavement(RAP)binder content for mixes containing RAP from different sources[J].Journal of Testing and Evaluation, 2021, 49(5): 3132-3147. DOI: 10.1520/jte20200106.
[7] Singh D, Showkat B, Sawant D. A study to compare virgin and target asphalt binder obtained from various RAP blending charts[J].Construction and Building Materials, 2019, 224: 109-123. DOI: 10.1016/j.conbuildmat.2019.07.038.
[8] Sreeram A, Leng Z, Zhang Y, et al. Evaluation of RAP binder mobilisation and blending efficiency in bituminous mixtures: An approach using ATR-FTIR and artificial aggregate[J].Construction and Building Materials, 2018, 179: 245-253. DOI: 10.1016/j.conbuildmat.2018.05.154.
[9] Hassan N, Khan R, Raaberg J, et al. Effect of mixing time on reclaimed asphalt mixtures: An investigation by means of imaging techniques[J].Construction and Building Materials, 2015, 99: 54-61. DOI: 10.1016/j.conbuildmat.2015.09.009.
[10] Gao L, Ni F J, Luo H L, et al. Permeability and air voids of cold recycled mixtures with asphalt emulsion[J].Journal of Southeast University(Natural Science Edition), 2015, 45(3): 581-585. DOI:10.3969/j.issn.1001-0505.2015.03.029. (in Chinese)
[11] Chen J, Yao C, Zhou R Y, et al.Directional difference of water permeability of porous asphalt mixture and influence of pore structure[J]. Journal of Southeast University(Natural Science Edition), 2018, 48(5): 920-926. DOI:10.3969/j.issn.1001-0505.2018.05.020. (in Chinese)
[12] Vassaux S, Gaudefroy V, Boulangé L, et al.Experimental investigation of blending phenomena in intergranular zones of recycled asphalt mixtures using customized infrared imaging and stage extraction methods[J]. Construction and Building Materials, 2019, 213: 234-245. DOI: 10.1016/j.conbuildmat.2019.04.045.
[13] Vassaux S, Gaudefroy V, Boulangé L, et al. Assessment of the binder blending in bituminous mixtures based on the development of an innovative sustainable infrared imaging methodology[J]. Journal of Cleaner Production, 2019, 215: 821-828. DOI: 10.1016/j.jclepro.2019.01.105. DOI: 10.1016/j.jclepro.2019.01.105.
[14] Castorena C, Pape S, Mooney C. Blending measurements in mixtures with reclaimed asphalt: Use of scanning electron microscopy with X-ray analysis[J].Transportation Research Record: Journal of the Transportation Research Board, 2016, 2574(1): 57-63. DOI: 10.3141/2574-06.
[15] Bressi S, Cavalli M C, Partl M N, et al.Particle clustering phenomena in hot asphalt mixtures with high content of reclaimed asphalt pavements[J]. Construction and Building Materials, 2015, 100: 207-217. DOI: 10.1016/j.conbuildmat.2015.09.052.
[16] Bressi S, Dumont A G, Pittet M. Cluster phenomenon and partial differential aging in RAP mixtures[J].Construction and Building Materials, 2015, 99: 288-297. DOI: 10.1016/j.conbuildmat.2015.09.024.
[17] Guo N S, You Z P, Tan Y Q, et al. Performance evaluation of warm mix asphalt containing reclaimed asphalt mixtures[J].International Journal of Pavement Engineering, 2017, 18(11): 981-989. DOI: 10.1080/10298436.2016.1138114.
[18] Ferreira W L G, Castelo Branco V T F, Vasconcelos K, et al. The impact of the RAP cluster dissociation on gradation and shape properties of aggregates from recycled asphalt mixtures[J].Journal of Testing and Evaluation, 2022, 50(2): 20210155. DOI: 10.1520/jte20210155.
[19] Xu G J, Ma T, Fang Z Y, et al. The evaluation method of particle clustering phenomena in RAP[J].Applied Sciences, 2019, 9(3): 424. DOI: 10.3390/app9030424.
[20] Abdelaziz A, Martin A E, Mercado E A, et al. Study of the quantification of recycled binder activity in asphalt mixtures with RAP[J]. Construction and Building Materials, 2021, 309: 125189. DOI: 10.1016/j.conbuildmat.2021.125189.
[21] Navaro J, Bruneau D, Drouadaine I, et al. Observation and evaluation of the degree of blending of reclaimed asphalt concretes using microscopy image analysis[J].Construction and Building Materials, 2012, 37: 135-143. DOI: 10.1016/j.conbuildmat.2012.07.048.
[22] Bressi S, Dumont A G, Partl M N. A new laboratory methodology for optimization of mixture design of asphalt concrete containing reclaimed asphalt pavement material[J].Materials and Structures, 2016, 49(12): 4975-4990. DOI: 10.1617/s11527-016-0837-1.
[23] Bressi S, Pittet M, Dumont A G, et al. A framework for characterizing RAP clustering in asphalt concrete mixtures[J].Construction and Building Materials, 2016, 106: 564-574. DOI: 10.1016/j.conbuildmat.2015.12.132.
[24] Wu J T, Jiao Y, Xia X Q, et al.Analysis on cluster quantification in hot recycled asphalt mixtures based on sieve tests[J]. Journal of Southeast University(Natural Science Edition), 2022, 52(3): 564-570. DOI:10.3969/j.issn.1001-0505.2022.03.018. (in Chinese)
[25] Zhu Y J, Xu G J, Ma T, et al. Research on modification and recycling of high viscosity asphalt based on molecular dynamics simulation[J]. Journal of Southeast University(Natural Science Edition), 2022, 52(4): 736-743. DOI:10.3969/j.issn.1001-0505.2022.04.015. (in Chinese)
[26] Li Q, Wang R J, Li B, et al.Effects of foaming agent on strength characteristics of cold recycled asphalt mixture[J]. Journal of Southeast University(Natural Science Edition), 2022, 52(2): 282-287. DOI:10.3969/j.issn.1001-0505.2022.02.010. (in Chinese)
[27] Wu J T, Wu Y, Liu Q, et al. Effect of pretreatment methods on performance of polyurethane recycling asphalt mixture[J]. Journal of Southeast University(Natural Science Edition), 2021, 51(3): 489-495. DOI:10.3969/j.issn.1001-0505.2021.03.018. (in Chinese)
[28] Sun P, Zhang K, Han S, et al. Method for the evaluation of the homogeneity of asphalt mixtures by 2-dimensional image analysis[J].Materials, 2022, 15(12): 4265. DOI: 10.3390/ma15124265.
[29] Li X L, Liu X Y, Lü X C, et al. Discrete element analysis of indirect tensile test based on image processing with annular segmentation and bimodal threshold[J]. Journal of Testing and Evaluation, 2020, 48(4): 2750-2767. DOI: 10.1520/jte20180667.
[30] Peng Y, Sun L J. Towards an index of asphalt mixture homogeneity[J].Road Materials and Pavement Design, 2009, 10(3): 545-567. DOI: 10.3166/rmpd.10.545-567.
[31] Li Z, Liu J H. Segmentation of asphalt mixtures using X-ray computed tomography images based on ring block and OTSU method[J]. Journal of Wuhan University of Technology, 2011, 33(6): 50-53, 58. DOI:10.3963/j.issn.1671-4431.2011.06.012. (in Chinese)

Memo

Memo:
Biography: Wu Jiantao(1981—), male, doctor, professor, jiantao.wu@hhu.edu.cn.
Foundation items: The National Science Foundation of China(No. 52078190), the Natural Science Foundation of Jiangsu Province(No. BK20221501), the Natural Science Youth Fund of Jiangsu Province(No. BK20220983), the Natural Science Foundation of Hebei Province(No. E2019203559).
Citation: Wu Jiantao, Qiu Lei, Jiao Yan, et al. Identification and analysis of mixing-induced homogeneity in reclaimed asphalt pavement materials[J].Journal of Southeast University(English Edition), 2024, 40(2):193-202.DOI:10.3969/j.issn.1003-7985.2024.02.010.
Last Update: 2024-06-20