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Studies have shown that the sustainable self-healing ability of asphalt materials under microwave radiation is related to the microwave absorption of the constituent materials. As a typical absorbing material, Fe3O4 and its derivatives have the potential to heal the micro cracks of asphalt materials multiple times by themselves, and enhance the sustainable self-healing properties. However, former researchers have neglected the fact that Fe3O4 will be gradually oxidized at high temperatures, such as 100 °C, resulting in the changes in material properties, microwave absorption and heat-generating capability. Therefore, the effects of different temperatures on the properties of controllable synthesized Fe3O4 were studied at 125 °C (mixing temperature of WMA), 150 °C (mixing temperature of HMA), 175 °C (mixing temperature of HMA with modified binder) and 200 °C (extreme mixing temperature). The phase compositions, chemical structure of synthesized Fe3O4 were characterized firstly. Then, their electromagnetic parameters, reflection loss were studied at a microwave frequency ranging from 1 to 18 GHz. Additionally, heat-generating abilities of them were characterized at usual microwave frequency of 2.45 GHz. Finally, the effects of different content of Fe3O4 on the rheological properties of pure asphalt were studied. The results show that the proportion of γ-Fe2O3 in the samples gradually increase with exposure temperature, and the static magnetic properties gradually deteriorate. The reflection loss of the modified asphalt decreases firstly and then increases. The F-150 modified asphalt has the strongest microwave absorption capacity. Under the 2.45 GHz microwave radiation, the F-150 modified asphalt presents the strongest heat-generating capability and is consistent with the results of reflection loss. It can be seen that the ratio of γ-Fe2O3 and Fe3O4 in F-150 has the best attenuation effect on microwave radiation, and Fe3O4 is more suitable as microwave absorber for self-healing enhancement of HMA.
Chao Li; Guodong Zeng; Min Zhou; Hongming Huang; Yang Fang; Zongwu Chen; Yishen Xu; Siyin Ding; Miao Yuan; Shaopeng Wu. Performance evolution of Fe3O4 used in the production of sustainable self-healing asphalt materials. Journal of Cleaner Production 2021, 314, 127960 .
AMA StyleChao Li, Guodong Zeng, Min Zhou, Hongming Huang, Yang Fang, Zongwu Chen, Yishen Xu, Siyin Ding, Miao Yuan, Shaopeng Wu. Performance evolution of Fe3O4 used in the production of sustainable self-healing asphalt materials. Journal of Cleaner Production. 2021; 314 ():127960.
Chicago/Turabian StyleChao Li; Guodong Zeng; Min Zhou; Hongming Huang; Yang Fang; Zongwu Chen; Yishen Xu; Siyin Ding; Miao Yuan; Shaopeng Wu. 2021. "Performance evolution of Fe3O4 used in the production of sustainable self-healing asphalt materials." Journal of Cleaner Production 314, no. : 127960.
Combination of styrene-butadiene-styrene (SBS) polymer and layered double hydroxides (LDHs) has commonly applied in asphalt to improve anti-ultraviolet aging performance, but it can not afford the reparation of cracks caused by aging of asphalt. Also, few researches focused on the structure and performance changes during synthesis of LDHs. Based on self-healing performance of asphalt, the produced cracks can be repaired by microwave heating. Therefore, the controllable synthesis of traditional microwave absorber SiC to wrap LDHs (SwL) at different temperatures was studied in this paper, and the effects of different SBS/SwL combination on the microwave absorption and exothermic properties of modified asphalt were studied. The SwL was firstly synthesized at 200 °C, 350 °C, 500 °C and 650 °C. Then morphology, phase composition, chemical structure of different SwL were evaluated. Finally, based on different combination of SBS and SwL, the effects of SBS/SwL on the microwave absorption in the frequency band from 1 GHz to 18 GHz and exothermic characteristics at 2.45 GHz of the modified asphalt were analyzed. The results show that SwL can be synthesized successfully, and the processing temperature significantly affects the structure of SwL. The SBS/SwL-200 modified asphalt has the best microwave absorption and exothermic properties. When used in self-healing asphalt, it is more advantageous to choose 200 °C as the synthesis temperature of SwL.
Chao Li; Guodong Zeng; Min Zhou; Yang Fang; Zongwu Chen; Yishen Xu; Siyin Ding; Miao Yuan; Shaopeng Wu. Controllable synthesis of SiC wrapped LDHs to reinforce microwave absorption and exothermic properties of styrene-butadiene-styrene (SBS) polymer modified asphalt. Materials Research Express 2021, 8, 035501 .
AMA StyleChao Li, Guodong Zeng, Min Zhou, Yang Fang, Zongwu Chen, Yishen Xu, Siyin Ding, Miao Yuan, Shaopeng Wu. Controllable synthesis of SiC wrapped LDHs to reinforce microwave absorption and exothermic properties of styrene-butadiene-styrene (SBS) polymer modified asphalt. Materials Research Express. 2021; 8 (3):035501.
Chicago/Turabian StyleChao Li; Guodong Zeng; Min Zhou; Yang Fang; Zongwu Chen; Yishen Xu; Siyin Ding; Miao Yuan; Shaopeng Wu. 2021. "Controllable synthesis of SiC wrapped LDHs to reinforce microwave absorption and exothermic properties of styrene-butadiene-styrene (SBS) polymer modified asphalt." Materials Research Express 8, no. 3: 035501.
For the large amount of waste carbon particles (WCP) produced by the printers, it has caused terrible pollutions to the Eco environment. It is important to innovate a new application area to deal with the WCP. The surface topography and size distribution of WCP were characterized by scanning electron microscope (SEM) and laser particle size analyzer respectively. It was used as an additive for asphalt, extensive experiments were conducted to determine the preparation parameters and evaluate the performance of WCP modified asphalt. The preparation parameters of WCP modified a sphalt were determined by a L9(33) orthogonal test. Basing on the physical performance of asphalt the optimum shearing temperature, shearing time and shearing rate of WCP modified asphalt are 155°C, 45 min, and 4000 r/min respectively. The viscosities results show that the mixing and compaction temperature of 12% WCP modified asphalt mixture are 5 °C and 9°C higher than that of asphalt mixture. The PG high- and low-temperature grades and fatigue factor of asphalt increase with increasing WCP content. 10% WCP is recommended as the optimum dosage to modify the asphalt, and it can obviously improve the high temperature stability of asphalt.
Chuangmin Li; Junfang Zou; Wang Ke; Guangli Wang; Tiantian Li; Yuanyuan Li; Shiqi Li; Benan Shu; Chao Li. Laboratory evaluation of asphalt binder modified by waste carbon particles (WCP) reclaimed from printers. International Journal of Pavement Research and Technology 2020, 14, 204 -212.
AMA StyleChuangmin Li, Junfang Zou, Wang Ke, Guangli Wang, Tiantian Li, Yuanyuan Li, Shiqi Li, Benan Shu, Chao Li. Laboratory evaluation of asphalt binder modified by waste carbon particles (WCP) reclaimed from printers. International Journal of Pavement Research and Technology. 2020; 14 (2):204-212.
Chicago/Turabian StyleChuangmin Li; Junfang Zou; Wang Ke; Guangli Wang; Tiantian Li; Yuanyuan Li; Shiqi Li; Benan Shu; Chao Li. 2020. "Laboratory evaluation of asphalt binder modified by waste carbon particles (WCP) reclaimed from printers." International Journal of Pavement Research and Technology 14, no. 2: 204-212.
The environmental factors, such as the ultraviolet (UV) radiation, water, acid, alkali and salt, can cause significant negative impacts on the bitumen. Therefore, multi-factors coupling ageing test is closer to the actual service conditions of bitumen. Nine groups of coupling-condition ageing tests (UV radiation and the acidic, alkaline and neutral solutions) were conducted on the bitumen (Pen60/80). The conditioning times were 3, 6 and 9 days. After the test, the coupling hazards and its mechanism of these environmental factors on bitumen were analyzed. In detail, the transition of the appearance, physical and rheological properties of bitumen was characterized, the results show that coupled conditions have much more serious negative impacts on the performance of bitumen. In addition, to reveal the mechanism of negative impacts, the chemical functional groups and components of bitumen were studied, meanwhile the pH value, organic carbon content and chemical functional groups of the residual solutions were also analyzed, indicating that the coupled ageing mechanism mainly includes three channels, they are the excitation and break of bituminous molecules, the dissolution and leach of the organic component in the solutions, and the catalytic action of the alkali metal ions.
Yuanyuan Li; Hechuan Li; Shuai Nie; Shaopeng Wu; Quantao Liu; Chuangmin Li; Benan Shu; Chao Li; Wei Song; Yingxue Zou; Ling Pang. Negative impacts of environmental factors (UV radiation, water and different solutions) on bitumen and its mechanism. Construction and Building Materials 2020, 265, 120288 .
AMA StyleYuanyuan Li, Hechuan Li, Shuai Nie, Shaopeng Wu, Quantao Liu, Chuangmin Li, Benan Shu, Chao Li, Wei Song, Yingxue Zou, Ling Pang. Negative impacts of environmental factors (UV radiation, water and different solutions) on bitumen and its mechanism. Construction and Building Materials. 2020; 265 ():120288.
Chicago/Turabian StyleYuanyuan Li; Hechuan Li; Shuai Nie; Shaopeng Wu; Quantao Liu; Chuangmin Li; Benan Shu; Chao Li; Wei Song; Yingxue Zou; Ling Pang. 2020. "Negative impacts of environmental factors (UV radiation, water and different solutions) on bitumen and its mechanism." Construction and Building Materials 265, no. : 120288.
In the bituminous mixture, the petroleum bituminous film wrapped in the surface of aggregate is very thin, which is obviously different from the neat bitumen. In this research, the most commonly used dense bituminous mixture (AC-13) was designated for the ultraviolet (UV) irradiation simulation test. The loose bituminous mixture was exposed under the UV irradiation for 7, 14 and 28 days respectively, and the UV irradiation intensity was 21.0 w/m2. After aging, the bitumen was recovered with the centrifuge separation method, the SARA components of the recovered bitumen (RB) was studied by the Thin-layer chromatography with flame ionization detection (TLC-FID). Meanwhile, the physical and rheological performance of the RB was investigated by the three major conventional indices and dynamic shearing parameters. In addition, the self-healing performance of bitumen was characterized by complex viscosity frequency-sweep test, capillary test and surface energy test before and after UV irradiation. The results show that with the extension of UV irradiation time, the chemical components of RB change obviously, which results in the deterioration of its colloid stability. Meanwhile, the physical and rheological performance of RB transitioned significantly (the decreases of penetration, ductility and phase angle of RB, and the increase of the softening point and complex modulus), indicates the RB becomes more embrittlement and hardening. Also, the worse flow behavior, the worse capillary fluidity and the lower surface free energy of RB result in the degradation of the self-healing performance of bituminous concrete.
Yuanyuan Li; Shaopeng Wu; Ying Dai; Chuangmin Li; Wei Song; Hechuan Li; Chao Li; Benan Shu. Transitions of component, physical, rheological and self-healing properties of petroleum bitumen from the loose bituminous mixture after UV irradiation. Fuel 2019, 262, 116507 .
AMA StyleYuanyuan Li, Shaopeng Wu, Ying Dai, Chuangmin Li, Wei Song, Hechuan Li, Chao Li, Benan Shu. Transitions of component, physical, rheological and self-healing properties of petroleum bitumen from the loose bituminous mixture after UV irradiation. Fuel. 2019; 262 ():116507.
Chicago/Turabian StyleYuanyuan Li; Shaopeng Wu; Ying Dai; Chuangmin Li; Wei Song; Hechuan Li; Chao Li; Benan Shu. 2019. "Transitions of component, physical, rheological and self-healing properties of petroleum bitumen from the loose bituminous mixture after UV irradiation." Fuel 262, no. : 116507.
Although huge numbers of investigations have been conducted for the ultraviolet (UV) aging of asphalt binder, research rarely focuses on the asphalt mixture. In order to evaluate the aging effect of UV radiation on the asphalt mixture, a dense grade of asphalt mixture was designated and aged by UV radiation for 7, 14 and 28 days respectively. After that, the chemical functional groups of asphalt binder were tested by Fourier transform infrared spectrometer (FTIR). The semi-circular bending strength and fatigue resistance of asphalt concrete were tested to characterize the mechanical properties of the asphalt concrete. To evaluate the self-healing effect of the macro-structure continuity of asphalt concrete intuitively, the computed tomography (CT) scanning machine was used to characterize the crack size of asphalt concrete samples both before and after self-healing. The results show that, with the increase of UV irradiation time, the relative ratios of the C=O and S=O bands' areas of recovered asphalt binder increase significantly. UV radiation can significantly weaken the mechanical and self-healing properties of asphalt mixture, making the asphalt mixture to have worse macro-structure continuity, lower failure strength and worse fatigue resistance. Moreover, the longer the UV irradiation time is, the degradation effect of UV radiation on asphalt mixture becomes more obvious.
Shaopeng Wu; Yong Ye; Yuanyuan Li; Chuangmin Li; Wei Song; Hechuan Li; Chao Li; Benan Shu; Shuai Nie. The Effect of UV Irradiation on the Chemical Structure, Mechanical and Self-Healing Properties of Asphalt Mixture. Materials 2019, 12, 2424 .
AMA StyleShaopeng Wu, Yong Ye, Yuanyuan Li, Chuangmin Li, Wei Song, Hechuan Li, Chao Li, Benan Shu, Shuai Nie. The Effect of UV Irradiation on the Chemical Structure, Mechanical and Self-Healing Properties of Asphalt Mixture. Materials. 2019; 12 (15):2424.
Chicago/Turabian StyleShaopeng Wu; Yong Ye; Yuanyuan Li; Chuangmin Li; Wei Song; Hechuan Li; Chao Li; Benan Shu; Shuai Nie. 2019. "The Effect of UV Irradiation on the Chemical Structure, Mechanical and Self-Healing Properties of Asphalt Mixture." Materials 12, no. 15: 2424.
Due to the difference of cooling and treatment processes (rolling method, hot braised method, layer pouring method), basic oxygen furnace (BOF) steel slag can be mainly classified as roller steel slag (RSS), hot braised steel slag (HBSS) and layer pouring steel slag (LPSS). Treatment difference directly results in the performance variations of different BOF steel slag and corresponding asphalt mixtures. The primary purpose of this research was to examine the effects of different cooling and treatment processes on the morphological discrepancy of different BOF steel slag. Also, the road performances of corresponding asphalt mixtures, and mechanism between steel slag performance and road performance were studied. The results show that LPSS owns the largest variability of angular index and texture index, and RSS has the most balanced morphological parameters. The structure of RSS asphalt mixture is advantageous for improving the ability of the asphalt mixture to resist the deformation and enhancing the stability of structure. Higher content of CaO and lower content of SiO2 make the acid-base reaction of RSS asphalt mixture most intense, which contribute to the best road performance of it.
Yong Ye; Shaopeng Wu; Chao Li; Dezhi Kong; Benan Shu. Morphological Discrepancy of Various Basic Oxygen Furnace Steel Slags and Road Performance of Corresponding Asphalt Mixtures. Materials 2019, 12, 2322 .
AMA StyleYong Ye, Shaopeng Wu, Chao Li, Dezhi Kong, Benan Shu. Morphological Discrepancy of Various Basic Oxygen Furnace Steel Slags and Road Performance of Corresponding Asphalt Mixtures. Materials. 2019; 12 (14):2322.
Chicago/Turabian StyleYong Ye; Shaopeng Wu; Chao Li; Dezhi Kong; Benan Shu. 2019. "Morphological Discrepancy of Various Basic Oxygen Furnace Steel Slags and Road Performance of Corresponding Asphalt Mixtures." Materials 12, no. 14: 2322.
At present, there are mainly two ways to accelerate the self-healing of asphalt materials, namely electromagnetic induction heating or microwave heating, and capsules encapsulating rejuvenator. In this paper, a kind of multi-responsive fiber (MRF) was synthesized, which combined the advantages of the two ways. Scanning electron microscope (SEM), energy dispersion spectrum (EDS), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy and thermogravimetric analysis (TGA) tests were conducted and confirmed the successfully synthesis of MRF. Graphene oxide (GO) was evenly distributed in the fiber wall. Rejuvenator was encapsulated in MRF in the form of droplets. In addition, MRF met temperature requirement when mixed with bitumen. Microwave response behavior of MRF was studied and shown that MRF had excellent microwave heating effect. The temperature of bitumen containing MRF had a significant increase under the induction of microwave. Meanwhile, bitumen containing MRF could generate a large amount of energy under the action of microwave, which provides a basis for accelerating the self-healing of bitumen by microwave heating. Crack response behavior of bitumen containing MRF was monitored and revealed that rejuvenator that was encapsulated in MRF could flow out and accelerate self-healing of bitumen under the induction of cracks. Modified ductility test was conducted and shown that the self-healing ability of bitumen containing MRF was significantly improved under the synergistic action of rejuvenator and microwave heating. This work provides a new direction for the research of self-healing of bitumen materials.
Benan Shu; Shaopeng Wu; Lijie Dong; Chao Li; Dezhi Kong; Xu Yang; Jose Norambuena-Contreras; Quantao Liu; Qing Wang. Synthesis and properties of microwave and crack responsive fibers encapsulating rejuvenator for bitumen self-healing. Materials Research Express 2019, 6, 085306 .
AMA StyleBenan Shu, Shaopeng Wu, Lijie Dong, Chao Li, Dezhi Kong, Xu Yang, Jose Norambuena-Contreras, Quantao Liu, Qing Wang. Synthesis and properties of microwave and crack responsive fibers encapsulating rejuvenator for bitumen self-healing. Materials Research Express. 2019; 6 (8):085306.
Chicago/Turabian StyleBenan Shu; Shaopeng Wu; Lijie Dong; Chao Li; Dezhi Kong; Xu Yang; Jose Norambuena-Contreras; Quantao Liu; Qing Wang. 2019. "Synthesis and properties of microwave and crack responsive fibers encapsulating rejuvenator for bitumen self-healing." Materials Research Express 6, no. 8: 085306.
The idea of prolonging the service life of asphalt mixture by improving the self-healing ability of asphalt has received extensive attention in recent years. In view of this, this work synthesized three kinds of encapsulating rejuvenator fibers to improve self-healing properties of asphalt mixtures. A series of characterizations were performed to study the morphology, chemical structure and thermal stability of the three kinds of fibers. Subsequently, the road performance of asphalt mixture containing the fiber were investigated, which included high and low temperature, water sensitivity and fatigue performances. Finally, the self-healing performance of asphalt mixture containing the fiber was investigated by 3PB test. The results revealed that the three kinds of encapsulating rejuvenator fibers were successfully synthesized. The fibers had excellent thermal stability, which met temperature requirements in the mixing and compaction process of asphalt mixtures. Road performance of asphalt mixture containing the fiber met the requirements. Self-healing ability of asphalt mixture containing the fiber was improved. Synergistic action of temperature and rejuvenator could further significantly improve the self-healing ability of the asphalt mixture.
Benan Shu; Shiwen Bao; Shaopeng Wu; Lijie Dong; Chao Li; Xu Yang; José Norambuena-Contreras; Quantao Liu; Qing Wang. Synthesis and Effect of Encapsulating Rejuvenator Fiber on the Performance of Asphalt Mixture. Materials 2019, 12, 1266 .
AMA StyleBenan Shu, Shiwen Bao, Shaopeng Wu, Lijie Dong, Chao Li, Xu Yang, José Norambuena-Contreras, Quantao Liu, Qing Wang. Synthesis and Effect of Encapsulating Rejuvenator Fiber on the Performance of Asphalt Mixture. Materials. 2019; 12 (8):1266.
Chicago/Turabian StyleBenan Shu; Shiwen Bao; Shaopeng Wu; Lijie Dong; Chao Li; Xu Yang; José Norambuena-Contreras; Quantao Liu; Qing Wang. 2019. "Synthesis and Effect of Encapsulating Rejuvenator Fiber on the Performance of Asphalt Mixture." Materials 12, no. 8: 1266.
Increasing temperature is a simple and convenient method to accelerate the self-healing process of bitumen. However, bitumen may not achieve the healing capability at lower temperature, and may be aged if temperature is too high. In addition, the bitumen is mixed with mineral filler and formed as asphalt mastic in asphalt concrete, so it is more accurate to study the initial self-healing from the perspective of asphalt mastic. The primary purpose of this research was to examine the initial self-healing temperature of asphalt mastic, which was determined by the flow behavior index obtained from the flow characteristics. Firstly, the texture and geometry characteristics of two fillers were analyzed, and then the initial self-healing temperature of nine types of asphalt mastic, pure bitumen (PB) and styrene-butadiene-styrene (SBS) modified bitumen were determined by the flow behavior index. Results demonstrate that the average standard deviation of gray-scale texture value of limestone filler (LF) is 21.24% lower than that of steel slag filler (SSF), showing that the steel slag filler has a better particle distribution and geometry characteristics. Also the initial self-healing temperatures of asphalt mastics with 0.2, 0.4 and 0.6 LF-PB volume ratio are 46.5 °C, 47.2 °C and 49.4 °C, which are 1.4 °C, 0.8 °C and 0.4 °C higher than that of asphalt mastics with SSF-PB, but not suitable for the evaluation of asphalt mastic contained SBS modified bitumen because of unique structure and performance of SBS.
Chao Li; Shaopeng Wu; Guanyu Tao; Yue Xiao. Initial Self-Healing Temperatures of Asphalt Mastics Based on Flow Behavior Index. Materials 2018, 11, 917 .
AMA StyleChao Li, Shaopeng Wu, Guanyu Tao, Yue Xiao. Initial Self-Healing Temperatures of Asphalt Mastics Based on Flow Behavior Index. Materials. 2018; 11 (6):917.
Chicago/Turabian StyleChao Li; Shaopeng Wu; Guanyu Tao; Yue Xiao. 2018. "Initial Self-Healing Temperatures of Asphalt Mastics Based on Flow Behavior Index." Materials 11, no. 6: 917.
Using a rejuvenator to improve the performance of asphalt pavement is an effective and economic way of hot asphalt recycling. This research analyzes the rejuvenating effect on aged asphalt by means of a Mortar Transfer Ratio (MTR) test, which concerns the ratio of asphalt mortar that moves from recycled aggregates (RAP aggregates) to fresh added aggregates when aged asphalt is treated with a regenerating agent and comes into contact with fresh aggregates. The proposed MTR test analyzes the regeneration in terms of the softening degree on aged asphalt when the rejuvenator is applied. The covered area ratio is studied with an image analyzing tool to understand the possibility of mortar transferring from RAP aggregates to fresh aggregates. Additionally, a micro-crack closure test is conducted and observed through a microscope. The repairing ability and diffusion characteristics of micro-cracks can therefore be analyzed. The test results demonstrate that the proposed mortar transfer ratio is a feasible way to evaluate rejuvenator diffusion during hot recycling. The mortar transfer ratio and uncovered area ratio on fresh aggregates are compatible, and can be used to quantify the contribution of the rejuvenator. Within a certain temperature range, the diffusing effect of the rejuvenator is better when the diffusing temperature is higher. The diffusion time of the rejuvenator is optimum when diffusion occurs for 4–8 h. When the rejuvenator is properly applied, the rough and cracking surface can be repaired, resulting in better covered aggregates. The micro-closure analysis visually indicates that rejuvenators can be used to repair the RAP aggregates during hot recycling.
Fusong Wang; Zipeng Wang; Chao Li; Yue Xiao; Shaopeng Wu; Pan Pan. The Rejuvenating Effect in Hot Asphalt Recycling by Mortar Transfer Ratio and Image Analysis. Materials 2017, 10, 574 .
AMA StyleFusong Wang, Zipeng Wang, Chao Li, Yue Xiao, Shaopeng Wu, Pan Pan. The Rejuvenating Effect in Hot Asphalt Recycling by Mortar Transfer Ratio and Image Analysis. Materials. 2017; 10 (6):574.
Chicago/Turabian StyleFusong Wang; Zipeng Wang; Chao Li; Yue Xiao; Shaopeng Wu; Pan Pan. 2017. "The Rejuvenating Effect in Hot Asphalt Recycling by Mortar Transfer Ratio and Image Analysis." Materials 10, no. 6: 574.
Aged asphalt mixture is heavily involved in pavement maintenance and renewed construction because of the development of recycling techniques. The aged bitumen binder has partially lost its viscous behavior. Rejuvenators are therefore designed and used in this recycling procedure to enhance the behavior of such aged reclaimed bitumen. However, tests have not yet been clearly specified to understand the diffusion characteristics of rejuvenators in aged bitumen. In this research, molecular dynamic simulation is proposed and conducted with Materials Studio software to study the diffusion behavior of rejuvenators in aged bitumen at the molecular level. Two rejuvenators, named R-1 and R-2, were included. The difference between these two rejuvenators is their chemical composition of C=O. The diffusion coefficient is determined by studying the molecular movement. Results illustrate that the proposed models can be used to study the diffusion of rejuvenators in aged bitumen sufficiently. In the meantime, a dynamic shear rheometer (DSR) is used to evaluate the recovery influence on aged bitumen resulting from rejuvenators. The experimental results strengthen the model simulations and indicate that the aging index of bitumen has a significant influence on the rejuvenating effect. Research results indicate that rejuvenators have a sufficient rejuvenating effect on the long-term aged bitumen and a limited effect on short-term aged bitumen.
Yue Xiao; Chao Li; Miao Wan; Xinxing Zhou; Yefei Wang; Shaopeng Wu. Study of the Diffusion of Rejuvenators and Its Effect on Aged Bitumen Binder. Applied Sciences 2017, 7, 397 .
AMA StyleYue Xiao, Chao Li, Miao Wan, Xinxing Zhou, Yefei Wang, Shaopeng Wu. Study of the Diffusion of Rejuvenators and Its Effect on Aged Bitumen Binder. Applied Sciences. 2017; 7 (4):397.
Chicago/Turabian StyleYue Xiao; Chao Li; Miao Wan; Xinxing Zhou; Yefei Wang; Shaopeng Wu. 2017. "Study of the Diffusion of Rejuvenators and Its Effect on Aged Bitumen Binder." Applied Sciences 7, no. 4: 397.