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| 1 | New innovations in pavement materials and engineering:A review on pavement engineering research 2021显示文摘Sustainable and resilient pavement infrastructure is critical for current economic and environmental challenges.In the past 10 years,the pavement infrastructure strongly supports the rapid development of the global social economy.New theories,new methods,new technologies and new materials related to pavement engineering are emerging.Deterioration of pavement infrastructure is a typical multi-physics problem.Because of actual coupled behaviors of traffic and environmental conditions,predictions of pavement service life become more and more complicated and require a deep knowledge of pavement material analysis.In order to summarize the current and determine the future research of pavement engineering,Journal of Traffic and Transportation Engineering(English Edition)has launched a review paper on the topic of'New innovations in pavement materials and engineering:A review on pavement engineering research 2021'.Based on the joint-effort of 43 scholars from 24 well-known universities in highway engineering,this review paper systematically analyzes the research status and future development direction of 5 major fields of pavement engineering in the world.The content includes asphalt binder performance and modeling,mixture performance and modeling of pavement materials,multi-scale mechanics,green and sustainable pavement,and intelligent pavement.Overall,this review paper is able to provide references and insights for researchers and engineers in the field of pavement engineering. | JTTE Editorial Office Jiaqi Chen Hancheng Dan Yongjie Ding Yangming Gao Meng Guo Shuaicheng Guo Bingye Han Bin Hong Yue Hou Chichun Hu Jing Hu Ju Huyan Jiwang Jiang Wei Jiang Cheng Li Pengfei Liu Yu Liu Zhuangzhuang Liu Guoyang Lu Jian Ouyang Xin Qu Dongya Ren Chao Wang Chaohui Wang Dawei Wang Di Wang Hainian Wang Haopeng Wang Yue Xiao Chao Xing Huining Xu Yu Yan Xu Yang Lingyun You Zhanping You Bin Yu Huayang Yu Huanan Yu Henglong Zhang Jizhe Zhang Changhong Zhou Changjun Zhou Xingyi Zhu | 2021 | Journal of Traffic and Transportation Engineering(English Edition)2021，8，6： | 7 |
| 2 | 沥青胶结料自愈合行为分子动力学模拟研究进展显示文摘沥青作为高分子聚合物,其成分、结构复杂,普通宏观实验无法研究其自愈合时内部结构的变化。为研究探寻沥青胶结料自愈合的特点,本文从高分子聚合物的角度出发,分析总结沥青胶结料自愈合微观机理;研究沥青分子模型构建的2类方法,指出沥青分子模型组合法与沥青平均分子模拟的区别;提出沥青分子结构模型合理性验证的4类方法,即沥青分子密度、径向分布函数(RDF)、溶解度参数与内聚能计算、玻璃态转化温度;提出以沥青分子的均方位移(MSD)和扩散系数等参量作为评定指标判定沥青胶结料的自愈合程度;将沥青分子自愈合性能的影响因素归纳为愈合温度、沥青内部结构特征,并归纳总结了目前沥青分子自愈合行为分子动力学模拟面临的问题与发展方向。 | 赵毅 杨臻 王佳 李静雯 郑煜 | 2023 | 化工进展2023，42，2： | 3 |
| 3 | 不同温度下沥青自愈合行为的纳观表征与分析研究显示文摘为了从纳观层面分析沥青的自愈合行为,通过分子动力学(MD)方法构建沥青分子模型,模拟裂缝两侧材料间的扩散融合过程分析沥青的自愈合行为和扩散融合效率,并提出纳观尺度上描述沥青自愈合能力的表征方法和参数。研究结果表明,沥青材料的自愈合行为在纳观上主要分为2个阶段:运动至完全接触阶段和扩散阶段。运动至完全接触阶段是体积发生变化的主要阶段,当达到完全接触状态时,扩散融合后沥青材料自愈合模型的体积会达到一个稳定值。模拟结果表明,分子扩散在自愈合过程中起着重要作用,扩散能力和效率的增大能提高沥青的自愈合性能。自愈合过程中模型的体积和密度均会随着温度的变化而变化,随着温度的升高,材料自愈合效率提高。同时,在扩散融合过程达到稳定后,自愈合模型的密度与单个沥青模型在同温度下的密度十分近似,表明在这一温度条件下沥青材料的自愈合过程基本完成。由此表明采用模型的相对浓度、内聚能密度CED和自由体积分数FFV能够有效表征沥青材料的自愈合程度和效率。 | 詹易群 吴昊 宋卫民 朱琳 | 2023 | 铁道科学与工程学报2023，20，2： | 0 |
| 4 | Effect of styrene-butadiene-styrene copolymer on the aging resistance of asphalt:An atomistic understanding from reactive molecular dynamics simulations显示文摘To reveal the potential influence of styrene-butadiene-styrene(SBS)polymer modification on the anti-aging performance of asphalt,and its mechanism,we explored the aging characteristics of base asphalt and SBS-modified asphalt by reaction force field(ReaxFF)and classical molecular dynamics simulations.The results illustrate that the SBS asphalt is more susceptible to oxidative aging than the base asphalt under oxygen-deficient conditions due to the presence of unsaturated C=C bonds in the SBS polymer.In the case of sufficient oxygen,the SBS polymer inhibits the oxidation of asphalt by restraining the diffusion of asphalt molecules.Compared with the base asphalt,the SBS asphalt exhibits a higher degree of oxidation at the early stage of pavement service and a lower degree of oxidation in the long run.In addition,SBS polymer degrades into small blocks during aging,thus counteracting the hardening of aged asphalt and partially restoring its low-temperature cracking resistance. | Dongliang Hu Xingyu Gu Bingyan Cui | 2021 | Frontiers of Structural and Civil Engineering2021，15，5： | 0 |
| 5 | α-烯烃共聚物提高沥青延度和抗剥离性能研究显示文摘采用传统自由基共聚方法,通过甲基丙烯酸十八烷基酯和丙烯酸丁酯共聚合反应,制备了甲基丙烯酸十八烷基酯-丙烯酸丁酯二元共聚物。该二元共聚物与沥青相容性好,极易溶解于沥青。二元共聚物改性沥青,延度有了极大提升,而软化点基本不变。当共聚物添加量在2%时,甲基丙烯酸十八烷基酯-丙烯酸丁酯(8∶2)共聚物使得改性沥青针入度与基质沥青相当。当共聚物添加量在4%~6%时,甲基丙烯酸十八烷基酯-丙烯酸丁酯(7∶3)共聚物使得改性沥青针入度与基质沥青相当。通过甲基丙烯酸十八酯、丙烯酸丁酯和丙烯酸自由基共聚合反应,制备了甲基丙烯酸十八酯-丙烯酸丁酯-丙烯酸三元共聚物。三元共聚物改性沥青抗剥离性能有了显著提高。共聚物中丙烯酸单体的存在是造成改性沥青抗剥离性能提高的关键。三元共聚物掺量越大,改性沥青的抗剥离性能越好。 | 贾真 朱超 袁福根 朱雪华 沈菊男 | 2023 | 苏州科技大学学报(自然科学版)2023，40，2： | 0 |
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