热再生沥青混合料有效再生率的影响分析
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摘要
为以宏观的角度量化分析热再生过程中老化沥青的转移程度。试验定义了有效再生率,并基于正交试验及MATLAB分析了不同因素对有效再生率的影响。试验沥青用量以沥青膜厚度为指标,利用磁铁矿易分离的特性,将拌合后的磁铁矿集料与RAP(室内模拟制备)分离并抽提、筛分,根据公式计算有效再生率,研究各因素对有效再生率的影响。结果表明:预热温度、拌合时间、沥青膜厚度的适当提高对有效再生率有一定的促进作用;预热温度过高会导致有效再生率的下降。正交试验及MATLAB分析得出,不同因素对有效再生率的影响程度排序为沥青膜厚度>拌合时间> RAP预热温度;试验以有效再生率的角度为优化热再生混合料的再生工艺提供了理论依据。
In order to quantitatively analyze the degree of transfer of aged asphalt during thermal regeneration from a macroscopic perspective,the experiment defines the effective regeneration rate and analyzes the influence of different factors on the effective regeneration rate based on orthogonal experiment and MATLAB. The test calculates the amount of asphalt based on the aggregate surface area and the effective asphalt film thickness. Separating the magnetite aggregate after mixing with RAP( indoor simulation preparation) by utilizing the characteristics of easy separation of magnetite. The effective regeneration rate was calculated according to the formula,and the influence of various factors on the effective regeneration rate was studied. The test results show that the proper increase of preheating temperature,mixing time and asphalt film thickness will increase the effective regeneration rate to some extent; Excessive preheating temperature will result in a decrease in the effective regeneration rate; the shorter the aging time,the easier the aged asphalt will be transferred; According to the orthogonal experiment and MATLAB,the degree of influence of different factors on the effective regeneration rate is ranked as asphalt film thicken-ss >mixing time > RAP preheating temperature; the experiment provides a theoretical basis for optimizing the regeneration process of the hot reclaimed mixture from the perspective of effective regeneration rate.
In order to quantitatively analyze the degree of transfer of aged asphalt during thermal regeneration from a macroscopic perspective,the experiment defines the effective regeneration rate and analyzes the influence of different factors on the effective regeneration rate based on orthogonal experiment and MATLAB. The test calculates the amount of asphalt based on the aggregate surface area and the effective asphalt film thickness. Separating the magnetite aggregate after mixing with RAP( indoor simulation preparation) by utilizing the characteristics of easy separation of magnetite. The effective regeneration rate was calculated according to the formula,and the influence of various factors on the effective regeneration rate was studied. The test results show that the proper increase of preheating temperature,mixing time and asphalt film thickness will increase the effective regeneration rate to some extent; Excessive preheating temperature will result in a decrease in the effective regeneration rate; the shorter the aging time,the easier the aged asphalt will be transferred; According to the orthogonal experiment and MATLAB,the degree of influence of different factors on the effective regeneration rate is ranked as asphalt film thicken-ss >mixing time > RAP preheating temperature; the experiment provides a theoretical basis for optimizing the regeneration process of the hot reclaimed mixture from the perspective of effective regeneration rate.
引文
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11 赵华.掺磁铁矿料沥青混合料微波特性与路用性能研究[D].西安:长安大学,2016Zhao Hua. Study on microwave characteristics and road performance of magnetized mineral aggregate asphalt mixture[D]. Xi'an:Chang'an University,2016
12 刘寒冰,吕得保.沥青混合料沥青膜厚度的确定[J].吉林大学学报(工学版),2011,41(增刊2):153-158Liu Hanbing,LüDebao. Determination of asphalt film thickness of asphalt mixture[J]. Journal of Jilin University:Engineering Edition,2011,41(S2):153-158
13 吕得保,刘寒冰,关长禄.沥青混合料的集料比表面积确定方法的研究[J].公路交通科技,2011,28(5):28-32LüDebao,Liu Hanbing,Guan Changlu. Study on the determination method of aggregate specific surface area of asphalt mixture[J].Journal of Highway and Transportation,2011,28(5):28-32
14 杨林,张秉夏. TG-2型土壤固化剂水泥石灰土的强度和稳定性试验[J].公路交通科技,2013,30(9):27-32Yang Lin,Zhang Bingxia. Experimental study on strength and stability of TG-2 soil curing agent cement lime soil[J]. Journal of Highway and Transportation Research and Development,2013,30(9):27-32
15 廖昱博,赖昭胜,黄圣淦. MATLAB-NNTool在旋光实验中的应用[J].河南师范大学学报(自然科学版),2012,40(6):56-58Liao Yubo,Lai Zhaosheng,Huang Shenggan. Application of MATLAB-NNTool in optical experiments[J]. Journal of Henan Normal University(Natural Science),2012,40(6):56-58
2 程培峰,向银剑,寇洪源,等.废旧沥青混合料掺量对热再生改性沥青混合料拌和压实温度的影响[J].科学技术与工程,2018,18(22):273-279Cheng Peifeng,Xiang Yinjian,Kou Hongyuan,et al. Effect of waste asphalt mixture content on mixing compaction temperature of hot recycled modified asphalt mixture[J]. Science Technology and Engineering,2018,18(22):273-279
3 张科,郑鑫,张旭.热再生沥青混合料疲劳特性试验研究[J].公路工程,2017,42(1):228-232Zhang Ke,Zheng Xin,Zhang Xu. Experimental study on fatigue characteristics of hot reclaimed asphalt mixture[J]. Highway Engineering,2017,42(1):228-232
4 李琳,尹玉霞.高比例RAP掺量热再生SMA混合料新旧料融合性及工厂化生产参数研究[J].公路工程,2016,41(4):232-236,260Li Lin,Yin Yuxia. Study on the fusion of new and old materials and industrialization parameters of RAP mixed heat recycling SMA mixture[J]. Journal of Highway Engineering,2016,41(4):232-236,260
5 李明欣,王选仓.新加沥青标号对高掺量RAP再生混合料强度及疲劳性能的影响[J].长安大学学报(自然科学版),2017,37(3):9-15Li Mingxin,Wang Xuancang. Effect of new asphalt label on strength and fatigue properties of high volume RAP recycled mixture[J]. Journal of Chang'an University(Natural Science Edition),2017,37(3):9-15
6 韦万峰,郭鹏,唐伯明.再生沥青混合料新-旧沥青扩散混合效率研究综述[J].材料导报,2017,31(11):109-114Wei Wanfeng,Guo Peng,Tang Boming. Summary of research on new-old asphalt diffusion mixing efficiency of recycled asphalt mixture[J]. Materials Review,2017,31(11):109-114
7 苏卫国,张旺.厂拌热再生中老化沥青有效再生率的研究[J].公路工程,2017,42(6):194-198Su Weiguo,Zhang Wang. Study on effective regeneration rate of aged asphalt in plant mixing heat regeneration[J]. Highway Engineering,2017,42(6):194-198
8 唐丽荣,杨基强.不同老化状态沥青纳米微观结构分析[J].中外公路,2017(增刊1):123-127Tang Lirong,Yang Jiqiang. Analysis of nanostructure of asphalt in different aging conditions[J]. China and Foreign Highway,2017(S1):123-127
9 杨毅文,马涛,卞国剑,等.老化沥青热再生有效再生率检测方法[J].建筑材料学报,2011,14(3):418-422Yang Yiwen,Ma Tao,Bian Guojian,et al. Detection method of effective regeneration rate of aged asphalt thermal regeneration[J].Journal of Building Materials,2011,14(3):418-422
10 郭德栋,张圣涛,李晋,等.厂拌热再生过程中旧矿料颗粒的迁移行为[J].山东大学学报(工学版),2018,48(2):46-52Guo Dedong,Zhang Shengtao,Li Jin,et al. The migration behavior of old mineral particles during the process of plant heat regeneration[J]. Journal of Shandong University(Engineering Edition),2018,48(2):46-52
11 赵华.掺磁铁矿料沥青混合料微波特性与路用性能研究[D].西安:长安大学,2016Zhao Hua. Study on microwave characteristics and road performance of magnetized mineral aggregate asphalt mixture[D]. Xi'an:Chang'an University,2016
12 刘寒冰,吕得保.沥青混合料沥青膜厚度的确定[J].吉林大学学报(工学版),2011,41(增刊2):153-158Liu Hanbing,LüDebao. Determination of asphalt film thickness of asphalt mixture[J]. Journal of Jilin University:Engineering Edition,2011,41(S2):153-158
13 吕得保,刘寒冰,关长禄.沥青混合料的集料比表面积确定方法的研究[J].公路交通科技,2011,28(5):28-32LüDebao,Liu Hanbing,Guan Changlu. Study on the determination method of aggregate specific surface area of asphalt mixture[J].Journal of Highway and Transportation,2011,28(5):28-32
14 杨林,张秉夏. TG-2型土壤固化剂水泥石灰土的强度和稳定性试验[J].公路交通科技,2013,30(9):27-32Yang Lin,Zhang Bingxia. Experimental study on strength and stability of TG-2 soil curing agent cement lime soil[J]. Journal of Highway and Transportation Research and Development,2013,30(9):27-32
15 廖昱博,赖昭胜,黄圣淦. MATLAB-NNTool在旋光实验中的应用[J].河南师范大学学报(自然科学版),2012,40(6):56-58Liao Yubo,Lai Zhaosheng,Huang Shenggan. Application of MATLAB-NNTool in optical experiments[J]. Journal of Henan Normal University(Natural Science),2012,40(6):56-58