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学者姓名：郭猛
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Abstract ：
In order to efficiently utilize the waste bituminous pavement materials and waste bio-oil, the composition of bio-oil rejuvenator was optimized. The rejuvenation efficiency of the waste bio-oil rejuvenator was evaluated from rheological properties and chemical composition. In addition, a quantitatively evaluation index for the rejuvenation efficiency was proposed. The results show that the central composite design and response surface methodology is effective in optimizing composition of rejuvenators. The dosage of waste bio-oil in the rejuvenated bitumen reached 9%. Compared to another two commercial rejuvenators, waste bio-oil rejuvenator rejuvenated the aged bitumen more effectively. Its rejuvenation efficiency for rheological parameters of aged bitumen was close to 100%. The waste bio-oil rejuvenator restored the performance of aged bitumen by reducing the proportion of macromolecular substances. The rejuvenation efficiency of aromatics, colloidal instability index and carbonyl functional groups were 57.1%, 126.9% and 78.7% respectively.
Keyword ：
Composition optimization Composition optimization Rejuvenator Rejuvenator Waste bio-oil Waste bio-oil Bitumen Bitumen Aging Aging
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| GB/T 7714 | Guo, Meng , Liang, Meichen , Liu, Haiqing et al. Optimization and validation of waste bio-oil based high-performance rejuvenator for rejuvenating aged bitumen [J]. | MATERIALS AND STRUCTURES , 2023 , 56 (5) . |
| MLA | Guo, Meng et al. "Optimization and validation of waste bio-oil based high-performance rejuvenator for rejuvenating aged bitumen" . | MATERIALS AND STRUCTURES 56 . 5 (2023) . |
| APA | Guo, Meng , Liang, Meichen , Liu, Haiqing , Du, Xiuli . Optimization and validation of waste bio-oil based high-performance rejuvenator for rejuvenating aged bitumen . | MATERIALS AND STRUCTURES , 2023 , 56 (5) . |
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Abstract ：
Ultraviolet (UV) radiation is one of the main causes of asphalt pavement aging. The development of UV-resistant technology is of great significance to improve the durability of asphalt pavement. In order to evaluate the feasibility of carbon black (CB) and hindered amine light stabilizer (HALS) as UV-resistant additives, the modified asphalt binders were prepared by adding CB and HALS. The dispersibility of UV-resistant additives in asphalt binder was evaluated by using a fluorescence microscope. Then, the aging resistance of additives and their effects on virgin asphalt binder were qualitatively evaluated by calculating rheological parameters. The new aging-resistant index and impact index were defined. The results show that the aging-resistant index and impact index can accurately characterize the aging resistance of additives and their effect on virgin asphalt binder. The UV-resistant additives slowed down the aging rate of asphalt binder. A 3 % dosage of CB had a great adverse effect on the properties of virgin asphalt binder. HALS showed good UV resistance and had little effect on virgin asphalt binder. The aging-resistant index of asphalt binder modified by HALS was about 1.63 times that of the asphalt binder modified by CB at the same dosage (1 %). The aging-resistant index of asphalt binder modified by 1 % HALS was only about 1.31 times that of asphalt binder modified by 0.5 % HALS. In addition, the dosage of HALS was changed from 0.5 % to 1 % and the impact indexes changed to more than 2.67 times. It was considered that HALS was more suitable for improving the aging resistance of asphalt binder with an optimal dosage of 0.5 %.
Keyword ：
UV-resistant additives UV-resistant additives stabilizer stabilizer asphalt binder asphalt binder carbon black carbon black aging resistance aging resistance hindered amine light hindered amine light dispersibility dispersibility
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| GB/T 7714 | Guo, Meng , Liang, Meichen , Du, Xiuli . Evaluation on Feasibility of Carbon Black and Hindered Amine Light Stabilizer as UV-Resistant Additives of Asphalt Binder [J]. | JOURNAL OF TESTING AND EVALUATION , 2023 , 51 (6) : 3987-4003 . |
| MLA | Guo, Meng et al. "Evaluation on Feasibility of Carbon Black and Hindered Amine Light Stabilizer as UV-Resistant Additives of Asphalt Binder" . | JOURNAL OF TESTING AND EVALUATION 51 . 6 (2023) : 3987-4003 . |
| APA | Guo, Meng , Liang, Meichen , Du, Xiuli . Evaluation on Feasibility of Carbon Black and Hindered Amine Light Stabilizer as UV-Resistant Additives of Asphalt Binder . | JOURNAL OF TESTING AND EVALUATION , 2023 , 51 (6) , 3987-4003 . |
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Abstract ：
Accelerated aging methods commonly used in laboratories struggle to replicate the outdoor aging process of asphalt binder. The aim of this study is to elucidate the impact of different environmental factors on the aging of asphalt binder and recreate the exposure process of asphalt binder. To achieve the study's objectives, the asphalt binder was subjected to various environmental conditions through different aging modes. Three exposure modes (all environmental factors, the effects of light, temperature, oxygen, the effects of temperature, oxygen, and others) were established to assess the impact of various environmental factors on asphalt binder aging behavior. This mode was labeled O+UV-aging, earning it the name O-aging. The aging behaviors were assessed across multiple dimensions, considering apparent morphology, rheological properties, and chemical composition. The study's findings highlight that factors such as ultraviolet radiation are primarily responsible for the formation of micro-cracks and increased surface roughness in aged asphalt binder. Ultraviolet radiation significantly affected the aging of asphalt binder during outdoor exposure. SBS modifiers increased the risk of fatigue cracking in the virgin asphalt binder but enhanced its aging resistance. After All-aging, the G-R parameter increase of virgin asphalt binder was 2.6 times that of SBS-modified asphalt binder. Throughout the exposure process, the broken molecular chains and the original molecular chains in the asphalt binder underwent polymerization reactions, resulting in longer carbon chains and cycloalkane aromatization. It was discovered that exposure showed less effect on the characteristic functional groups of SBS-modified binder than on virgin binder. After All-aging, the carbonyl index of SBS-modified asphalt binder was 56.4% higher than that of virgin asphalt binder.
Keyword ：
chemical composition chemical composition apparent morphology apparent morphology rheological properties rheological properties aging by exposure aging by exposure
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| GB/T 7714 | Song, Shanglin , Wang, Linbing , Fu, Chunping et al. Study on the Aging Behavior of Asphalt Binder Exposed to Different Environmental Factors [J]. | APPLIED SCIENCES-BASEL , 2023 , 13 (23) . |
| MLA | Song, Shanglin et al. "Study on the Aging Behavior of Asphalt Binder Exposed to Different Environmental Factors" . | APPLIED SCIENCES-BASEL 13 . 23 (2023) . |
| APA | Song, Shanglin , Wang, Linbing , Fu, Chunping , Guo, Meng , Jiang, Xiaoqiang , Liang, Meichen et al. Study on the Aging Behavior of Asphalt Binder Exposed to Different Environmental Factors . | APPLIED SCIENCES-BASEL , 2023 , 13 (23) . |
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Abstract ：
This paper aims to investigate the effect of different environmental conditions on the aging properties of virgin asphalt binder and evaluate the magnitude of aging on asphalt binder under different environmental conditions. The effect of thermal, oxidative and ultraviolet aging on the rutting resistance, fatigue resistance and cracking resistance of virgin asphalt binder was characterised based on rheological parameters. The contribution rate of different environmental factors to the aging of asphalt binder was quantitatively analysed. Results showed that high temperature repaired cracks in the asphalt binder caused by ultraviolet aging. The single aging factor of heat, oxygen and light had little effect on the rheological properties of asphalt binder. High temperature and oxygen would accelerate the aging effect of the asphalt binder aging process. Thermal-oxidative-UV-coupled aging had a more pronounced effect on the aging of asphalt binder than thermal-oxidative aging. The fatigue resistance of asphalt binder is more sensitive to the response of aging. The contribution rates of thermal-UV aging, UV-oxidative aging and thermal-oxidative aging were all greater than the sum of the contribution rates of the two corresponding single factors. The aging of asphalt binder was mainly due to thermal-oxidative aging when the aging temperature exceeded 80 degrees C.
Keyword ：
coupled aging coupled aging Asphalt binder Asphalt binder the contribution rate the contribution rate rheological properties rheological properties quantitative analysis quantitative analysis
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| GB/T 7714 | Guo, Meng , Yin, Xu , Liang, Meichen et al. Study on effect of thermal, oxidative and ultraviolet coupled aging on rheological properties of asphalt binder and their contribution rates [J]. | INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING , 2023 , 24 (1) . |
| MLA | Guo, Meng et al. "Study on effect of thermal, oxidative and ultraviolet coupled aging on rheological properties of asphalt binder and their contribution rates" . | INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING 24 . 1 (2023) . |
| APA | Guo, Meng , Yin, Xu , Liang, Meichen , Du, Xiuli . Study on effect of thermal, oxidative and ultraviolet coupled aging on rheological properties of asphalt binder and their contribution rates . | INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING , 2023 , 24 (1) . |
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Abstract ：
Due to the temperature changes caused by seasonal changes and extreme weather, asphalt pavement suffers from rutting, cracking, and other damage. With commonly used pavement additives, the high-temperature performance and the low-temperature performance of asphalt pavement show opposite trends, with related research endeavoring to find a balance between the two. In this study, a dual-phase-change material (DPCM) with both high- and low-temperature effects was prepared. The chemical stability and rheological properties of modified asphalt binders were characterized using Fourier transform infrared spectroscopy (FTIR) and a dynamic shear rheometer (DSR). Temperature control tests of the DPCM-modified asphalt binders were carried out with an indoor simulation device. The results show that the DPCMs could improve the rutting resistance of the asphalt binders at a high temperature, but the fatigue performance of the modified asphalt binder with different DPCM contents was reduced. The FTIR results showed that no chemical reaction occurred in the mixing of the asphalt binder and the DPCM. In the indoor simulation temperature control test, the 40% DPCM-content-modified asphalt binder reduced the high-temperature extreme value by 4.2 degrees C and increased the low-temperature extreme value by 2.5 degrees C, showing a good temperature control effect and practical application value.
Keyword ：
rutting resistance rutting resistance rheology rheology modified asphalt modified asphalt phase-change materials phase-change materials
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| GB/T 7714 | Huo, Donghui , Hou, Debao , Zhang, Shuaixiang et al. Study of Pavement Performance and Temperature Regulation Capacity of Asphalt Binders Modified with Dual-Phase-Change Materials [J]. | BUILDINGS , 2023 , 13 (11) . |
| MLA | Huo, Donghui et al. "Study of Pavement Performance and Temperature Regulation Capacity of Asphalt Binders Modified with Dual-Phase-Change Materials" . | BUILDINGS 13 . 11 (2023) . |
| APA | Huo, Donghui , Hou, Debao , Zhang, Shuaixiang , Gao, Wei , Yu, Changchun , Jia, Ling et al. Study of Pavement Performance and Temperature Regulation Capacity of Asphalt Binders Modified with Dual-Phase-Change Materials . | BUILDINGS , 2023 , 13 (11) . |
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Abstract ：
The aging behavior of asphalt binder in service is complex. The accelerated aging methods commonly used in the laboratory are difficult to reproduce the aging behavior of asphalt binder in service. The purpose of this study is to develop a method for predicting the properties of asphalt binder in service. First, a multi-factor accelerating (MFA) aging method was developed to accelerate the aging of asphalt binder. Multi-scale characterization and correlation analysis were conducted on the MFA-aged asphalt binder. Then, the evaluation index of MFA aging was defined, which was used to establish the prediction equation for asphalt binder aging. Finally, the time correlation between field aging, pressure aging vessel (PAV) aging and MFA aging was constructed separately. The results show that accelerated aging of asphalt binder at atmospheric pressure and service temperature can be achieved by the coupled effect of temperature, ultraviolet light and rain. After 5-day MFA aging, the Glover -Rowe (G-R) parameter, an index for evaluating the cracking resistance of asphalt binder, was increased by 308%. The carbonyl index, an index for evaluating the content of chemical functional groups of asphalt binder, was increased by 67%. The correlation between the G-R parameter and the carbonyl index was linear, and the goodness-of-fit was greater than 0.9. The carbonyl index as a key chemical index may reflect the macroscopic properties of asphalt binder. The prediction equation for aging was established based on the carbonyl index of field-aged asphalt binder in Beijing, with reliability greater than 0.98. PAV aging for 20 h was equivalent to 1.35 years of asphalt binder service in Beijing. MFA aging method can better predict the aging time in the field. The prediction accuracy was 97.2%, which was 4.9% higher compared to that of PAV aging. MFA aging for 5 days was equivalent to about 2 years of asphalt binder service in Beijing.
Keyword ：
Aging rate Aging rate Field aging Field aging Prediction equation for aging Prediction equation for aging Multi -factor accelerating aging Multi -factor accelerating aging
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| GB/T 7714 | Liang, Meichen , Guo, Meng , Xu, Xiaoxiao et al. Study on accelerated aging rate of asphalt binder under multi-factors coupling conditions [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 400 . |
| MLA | Liang, Meichen et al. "Study on accelerated aging rate of asphalt binder under multi-factors coupling conditions" . | CONSTRUCTION AND BUILDING MATERIALS 400 (2023) . |
| APA | Liang, Meichen , Guo, Meng , Xu, Xiaoxiao , Liu, Xu , Liu, Hao , Bi, Yufeng . Study on accelerated aging rate of asphalt binder under multi-factors coupling conditions . | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 400 . |
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Abstract ：
Adding rejuvenator is a feasible method to restore the properties of aged asphalt. Due to the complex rejuve-nation mechanism between different rejuvenators and aged asphalt, there is no unified standard to evaluate the rejuvenation effect of rejuvenator. Most of the current research on rejuvenator focus on the characterization of macro mechanical properties of rejuvenated asphalt binder. In order to explore the changes of chemical composition and micromechanical properties of asphalt during aging and rejuvenation, fifteen kinds of virgin asphalt samples at different aging and rejuvenation stages were prepared. A commercial rejuvenator, aromatic oil and warm mix agent were selected as rejuvenators. The fifteen asphalt samples involved various aging methods, including water-ultraviolet aging, water free ultraviolet aging, RTFOT and PAV. Through gel perme-ation chromatography (GPC), Fourier transform infrared spectrometer (FTIR) and atomic force microscope (AFM) test, the reversibility evaluation index Rw, RC=O, RS=O and RDMT were proposed. These indexes could be used to quantitatively evaluate the rejuvenation effects of rejuvenator on the specific properties of aged asphalt. Based on the linear fitting results among various indexes, micro reversibility index of virgin asphalt (IRIV) was proposed. The results showed that the commercial rejuvenator and warm mix agent had a limited effect on the recovery of chemical composition and molecular weight of aged asphalt. The commercial rejuvenator over restored the micro mechanical properties of aged asphalt. The effect of aromatic oil on micro mechanical properties of aged asphalt was between commercial rejuvenator and warm mix agent. This study provides a way to quantitatively evaluate the rejuvenation effect of rejuvenator on virgin asphalt binder. It is helpful to better understand the aging-rejuvenation process of virgin asphalt binder more comprehensively from chemical and micromechanical properties.
Keyword ：
Aging Aging Virgin asphalt binder Virgin asphalt binder Rejuvenation Rejuvenation Chemical and micromechanical properties Chemical and micromechanical properties Unified evaluation index Unified evaluation index
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| GB/T 7714 | Guo, Meng , Zhang, Shuaixiang , Du, Xiuli et al. Study on effect of various rejuvenators on virgin asphalt binders suffering various aging conditions and the unified evaluation index [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 397 . |
| MLA | Guo, Meng et al. "Study on effect of various rejuvenators on virgin asphalt binders suffering various aging conditions and the unified evaluation index" . | CONSTRUCTION AND BUILDING MATERIALS 397 (2023) . |
| APA | Guo, Meng , Zhang, Shuaixiang , Du, Xiuli , Tan, Yiqiu , Luo, Daisong . Study on effect of various rejuvenators on virgin asphalt binders suffering various aging conditions and the unified evaluation index . | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 397 . |
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Abstract ：
The efficient recycling of road materials is an effective way to reduce carbon emissions. Approximately 400 million tons of waste asphalt pavement materials is generated annually in China, but the utilization rate is less than 50%. In this paper, a whole life cycle CO2 emission calculation model for recycled asphalt mixtures is established, and an uncertainty analysis is carried out on the basis of this model. The steps in the recycled asphalt mixture stage with the greatest impact on emissions are identified. The life cycle of asphalt mixtures is divided into raw material production, mixture preparation, material transportation and construction phases based on the carbon emission trends in the four phases. First, recycled asphalt mixtures are considered, and the carbon emissions along a two-way four-lane highway are analyzed based on the relevant carbon emission factor and other known data. The carbon dioxide emissions of each stage are also compared to identify the key links among stages. Then, the carbon emissions of hot-recycled asphalt mixtures are compared with those of ordinary asphalt mixtures and cold-recycled asphalt mixtures in each stage. Finally, an analytical uncertainty study of recycled asphalt mixtures is conducted using uncertainty modeling in different scenarios. Based on the quantitative results of the carbon emission calculations through life cycle assessment (LCA), future measures for reducing carbon emissions from recycled asphalt mixtures are proposed.
Keyword ：
uncertainty analysis uncertainty analysis different stages different stages recycled asphalt mixtures recycled asphalt mixtures life cycle carbon emissions life cycle carbon emissions
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| GB/T 7714 | Wang, Jingjing , Sha, Chuan , Ly, Sivmey et al. Life Cycle Carbon Emissions and an Uncertainty Analysis of Recycled Asphalt Mixtures [J]. | SUSTAINABILITY , 2023 , 15 (23) . |
| MLA | Wang, Jingjing et al. "Life Cycle Carbon Emissions and an Uncertainty Analysis of Recycled Asphalt Mixtures" . | SUSTAINABILITY 15 . 23 (2023) . |
| APA | Wang, Jingjing , Sha, Chuan , Ly, Sivmey , Wang, Hao , Sun, Yu , Guo, Meng . Life Cycle Carbon Emissions and an Uncertainty Analysis of Recycled Asphalt Mixtures . | SUSTAINABILITY , 2023 , 15 (23) . |
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Abstract ：
Improving the anti-ageing performance of bitumen plays a vital role in prolonging the service life of bituminous pavement. A bituminous additive for resisting all-weather ageing (BARAA), with excellent anti-ageing performance and fewer side effects, was developed in this study. The service life of bitumen can be doubled by using BARAA. The results show that the anti-ageing index and influence index can quantitatively evaluate the anti-ageing performance of anti-ageing additives. The BARAA was composed of amine antioxidant (1.89% by weight of base bitumen), Ni-containing antioxidant (3%) and hindered amine light stabilisers (0.7%). BARAA effectively delayed the deterioration of bitumen performance during ageing. The J (nr) reduction of BARAA-modified bitumen caused by ageing was 17.7% of the base bitumen. At -12 degrees C and -18 degrees C, the S increase of BARAA-modified bitumen caused by ageing was about 35% of the base bitumen. The oxidation during ageing was inhibited. The growth of sulphoxide groups can be curbed by BARAA. After long-term ageng, the aromatic ring increase of BARAA-modified bitumen was 41.1% of the base bitumen. In addition, the increase of average molecular weight and functional group index of BARAA-modified bitumen caused by long-term ageing was 57% and 19.1% of the base bitumen, respectively.
Keyword ：
composition optimisation composition optimisation anti-ageing performance anti-ageing performance anti-ageing additives anti-ageing additives Bitumen Bitumen all-weather ageing all-weather ageing evaluation method evaluation method
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| GB/T 7714 | Liang, Meichen , Guo, Meng , Tan, Yiqiu et al. Evaluation of anti-ageing performance of bitumen based on rheological and chemical characterisation [J]. | INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING , 2023 , 24 (1) . |
| MLA | Liang, Meichen et al. "Evaluation of anti-ageing performance of bitumen based on rheological and chemical characterisation" . | INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING 24 . 1 (2023) . |
| APA | Liang, Meichen , Guo, Meng , Tan, Yiqiu , He, Shuxin , Du, Xiuli . Evaluation of anti-ageing performance of bitumen based on rheological and chemical characterisation . | INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING , 2023 , 24 (1) . |
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Abstract ：
Crumb rubber can not only solve the environmental pressure but also improve the properties of bituminous pavement. To study the characteristics and mechanism of ozone aging on CRMB, the effects of ozone aging on the rheological properties and chemical composition of crumb rubber-modified bitumen (CRMB) were explored. It was also compared with thermal oxygen. The results show that the macromolecules such as aromatic rings and polar functional group were formed after ozone aging, and the average molecular weight of CRMB increased. Ozone reacted rapidly with the CRMB surface at the beginning of the reaction and leaded to an increase in surface roughness. The risk of fatigue cracking increased. The effect of ozone aging (3 days, 60 degrees C, 1000 ppb) on CRMB was similar to that of long-term aging. The effect of ozone on CRMB was mainly due to the ozone sensitivity of the crumb rubber modifier.
Keyword ：
ozone aging ozone aging Crumb rubber-modified bitumen Crumb rubber-modified bitumen rheology rheology chemistry chemistry macro and micro correlation macro and micro correlation
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| GB/T 7714 | Liang, Meichen , Fu, Zhen , Guo, Meng et al. Effect of ozone aging on the rheological and chemical properties of crumb rubber-modified bitumen [J]. | ROAD MATERIALS AND PAVEMENT DESIGN , 2023 , 25 (3) : 529-546 . |
| MLA | Liang, Meichen et al. "Effect of ozone aging on the rheological and chemical properties of crumb rubber-modified bitumen" . | ROAD MATERIALS AND PAVEMENT DESIGN 25 . 3 (2023) : 529-546 . |
| APA | Liang, Meichen , Fu, Zhen , Guo, Meng , Du, Xiuli , Tan, Yiqiu . Effect of ozone aging on the rheological and chemical properties of crumb rubber-modified bitumen . | ROAD MATERIALS AND PAVEMENT DESIGN , 2023 , 25 (3) , 529-546 . |
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