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Yuanyuan Li
School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430205, Hubei, China

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Journal article
Published: 21 May 2021 in Construction and Building Materials
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The ultraviolet (UV) aging of asphalt is one of the main factors to reduce the service span of asphalt pavement. However, the increasing behavior of aging depth of asphalt is still not clear. The research work on the aging behaviors of asphalt is good for understanding the aging mechanism of asphalt, and developing anti-aging technologies for asphalt pavement. In this research, three UV lights with different intensities were generated to age the asphalt binder. After the aging, the asphalt was stripped layer by layer with the dissolution stripping method. The rheological properties and chemical structure of asphalt from different depths were tested with Fourier transform infrared spectrometer (FTIR) and dynamic shear rheometer (DSR) respectively. The results show that under a same condition, the aging effect of UV light with higher intensity on asphalt is more significant than that with lower intensity. The UV aging of asphalt is a process of gradual development, which starts from the surface of asphalt and gradually develops to the deeper part of asphalt. Therefore, with time going, the aging depth of asphalt will increase gradually, and a gradient aging degree also exists in asphalt from different depths. Moreover, even at a same depth, the aging status of asphalt is also different if aged by UV lights with different intensities. The growth behavior of aging depth of asphalt can be divided into two stages, which can be characterized by a two-stage model. During 0–24 h, it accords with the power model; after 24 h, it accords with a linear model.

ACS Style

Yuanyuan Li; Jianlin Feng; Fei Yang; Shaopeng Wu; Quantao Liu; Tao Bai; Zhangjun Liu; Chuangmin Li; Dengjun Gu; Anqi Chen; Yuanshang Jin. Gradient aging behaviors of asphalt aged by ultraviolet lights with various intensities. Construction and Building Materials 2021, 295, 123618 .

AMA Style

Yuanyuan Li, Jianlin Feng, Fei Yang, Shaopeng Wu, Quantao Liu, Tao Bai, Zhangjun Liu, Chuangmin Li, Dengjun Gu, Anqi Chen, Yuanshang Jin. Gradient aging behaviors of asphalt aged by ultraviolet lights with various intensities. Construction and Building Materials. 2021; 295 ():123618.

Chicago/Turabian Style

Yuanyuan Li; Jianlin Feng; Fei Yang; Shaopeng Wu; Quantao Liu; Tao Bai; Zhangjun Liu; Chuangmin Li; Dengjun Gu; Anqi Chen; Yuanshang Jin. 2021. "Gradient aging behaviors of asphalt aged by ultraviolet lights with various intensities." Construction and Building Materials 295, no. : 123618.

Journal article
Published: 20 August 2020 in Applied Sciences
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Gasoline is widely used as a powerful organic solvent to remove asphalt residuals in road engineering applications; however, it is also known as a non-renewable fuel resource. This research aims to employ mineral powder to mitigate the consumption of gasoline in asphalt binder cleaning process, and evaluate its mechanism, environmental and economic benefits. Based on X-Ray Diffraction (XRD) spectra, X-Ray Fluorescence (XRF) spectra and Atomic Absorption Spectroscopy (AAS) detection, the microstructure and composition of mineral powder was investigated after adsorbing asphalt components from gasoline solution. Fourier Transform Infrared spectra (FTIR) were used to calculate the adsorption efficiency. Moreover, the assessments of environmental and economic impacts of investigated approach were evaluated quantitatively. The results indicated that the interactions between mineral powder and asphalt binder have not changed the crystal phase, and the rough interface of mineral powder could adsorb approximately 4% asphalt binder from the gasoline solution according to the detection of Zn. The comparative analysis, regarding cost-effectiveness and environmental impacts, demonstrated that once 1 kg asphalt adsorbed by mineral powder, recycling gasoline with mineral powder, could reduce costs by 80% (CNY 57.10), energy use by 97% (352.88 MJ) and equivalent CO2 emission by 93% (23.95 kg).

ACS Style

Fusong Wang; Hechuan Li; Qi Jiang; Chao Yang; Yuanyuan Li; Shaopeng Wu. Mechanism and Investment Analysis of Recycling Gasoline Solvent with Mineral Powder for Asphalt Cleaning. Applied Sciences 2020, 10, 5761 .

AMA Style

Fusong Wang, Hechuan Li, Qi Jiang, Chao Yang, Yuanyuan Li, Shaopeng Wu. Mechanism and Investment Analysis of Recycling Gasoline Solvent with Mineral Powder for Asphalt Cleaning. Applied Sciences. 2020; 10 (17):5761.

Chicago/Turabian Style

Fusong Wang; Hechuan Li; Qi Jiang; Chao Yang; Yuanyuan Li; Shaopeng Wu. 2020. "Mechanism and Investment Analysis of Recycling Gasoline Solvent with Mineral Powder for Asphalt Cleaning." Applied Sciences 10, no. 17: 5761.

Article in press
Published: 10 August 2020 in International Journal of Pavement Research and Technology
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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.

ACS Style

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 Style

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 (2):204-212.

Chicago/Turabian Style

Chuangmin 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.

Journal article
Published: 30 July 2020 in Construction and Building Materials
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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.

ACS Style

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 Style

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.

Chicago/Turabian Style

Yuanyuan 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.

Journal article
Published: 15 May 2020 in Journal of Hazardous Materials
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Volatile organic compounds (VOCs) release from asphalt pavement construction is a potential emission source. The detailed emission behaviors were simulated in the laboratory, and the corresponding environmental impact was investigated as well. A set of dedicated devices were applied to mirror 3 representative scenarios namely mixture plant, transportation and paving processes with VOCs emission concentrations varied from 4.24 mg/m3 to 104.16 mg/m3. Ozone formation potential (OFP) and secondary organic aerosol (SOA) were built to evaluate the environmental impact, indicating that the reactive ability differed in the specified substances. The alkenes (n ≤ 4) and aldehydes, alkanes (n ≥ 6) and alkylbenzenes with relative lower concentration were the main sources for the OFP and SOA generation, and they contributed to more than 62% OFP and 97% SOA respectively. The top 10 contributors to concentration, OFP and SOA had been identified. For the complex species existed in VOCs emission and the lack of VOCs control standards, this study provided possible access to screen priority-controlled pollutants based on information entropy method, in terms of both environmental and human health impact. In addition, the first-class priority-controlled species had been determined, urgently needing more attention in the future VOCs management during asphalt pavement construction.

ACS Style

Na Li; Qi Jiang; Fusong Wang; Jun Xie; Yuanyuan Li; Jiashuo Li; Shaopeng Wu. Emission behavior, environmental impact and priority-controlled pollutants assessment of volatile organic compounds (VOCs) during asphalt pavement construction based on laboratory experiment. Journal of Hazardous Materials 2020, 398, 122904 .

AMA Style

Na Li, Qi Jiang, Fusong Wang, Jun Xie, Yuanyuan Li, Jiashuo Li, Shaopeng Wu. Emission behavior, environmental impact and priority-controlled pollutants assessment of volatile organic compounds (VOCs) during asphalt pavement construction based on laboratory experiment. Journal of Hazardous Materials. 2020; 398 ():122904.

Chicago/Turabian Style

Na Li; Qi Jiang; Fusong Wang; Jun Xie; Yuanyuan Li; Jiashuo Li; Shaopeng Wu. 2020. "Emission behavior, environmental impact and priority-controlled pollutants assessment of volatile organic compounds (VOCs) during asphalt pavement construction based on laboratory experiment." Journal of Hazardous Materials 398, no. : 122904.

Journal article
Published: 16 January 2020 in Construction and Building Materials
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The objective of this paper was to study the effect of hydrodynamic impact on durability and healing performance of inductive asphalt concrete (IAC) through moisture induced sensitivity test (MIST). AC-13 inductive asphalt concrete containing steel fiber was designed and Marshall specimens were prepared to suffer MIST in orthogonal condition. After MIST, cutting was performed to observe the corrosion of steel fibers inside while semi-circular bending (SCB) test was conducted to evaluate the mechanical properties. Then fracture-healing procedure was carried out to investigate the strength recovery ratios of the specimens before and after MIST. Meanwhile, the crack healing ratio and change of air voids inside asphalt concrete were observed by computed tomography (CT) scan test. The results showed that there was no corrosion of steel fibers inside samples after short term simulation in the laboratory. The tensile strength and fracture energy decreased after MIST. The changing trends of strength recovery ratio and fracture energy recovery ratio were consistent with that of tensile strength. CT-scan indicated that the healing ratio of crack was up to 92.3%. The initial air void content of asphalt concrete was 4.7%, 5.7% after adding steel fibers, and 4.87% after induction heating. However, the air void changed from 5.7% to 6.8% after MIST. Orthogonal test factor analysis showed that temperature was the most significant factor affecting the durability of asphalt concrete during MIST.

ACS Style

Hechuan Li; Jianying Yu; Shaopeng Wu; Quantao Liu; Yaqi Wu; Haiqin Xu; Yuanyuan Li. Effect of moisture conditioning on mechanical and healing properties of inductive asphalt concrete. Construction and Building Materials 2020, 241, 118139 .

AMA Style

Hechuan Li, Jianying Yu, Shaopeng Wu, Quantao Liu, Yaqi Wu, Haiqin Xu, Yuanyuan Li. Effect of moisture conditioning on mechanical and healing properties of inductive asphalt concrete. Construction and Building Materials. 2020; 241 ():118139.

Chicago/Turabian Style

Hechuan Li; Jianying Yu; Shaopeng Wu; Quantao Liu; Yaqi Wu; Haiqin Xu; Yuanyuan Li. 2020. "Effect of moisture conditioning on mechanical and healing properties of inductive asphalt concrete." Construction and Building Materials 241, no. : 118139.

Journal article
Published: 10 December 2019 in Materials
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Using rejuvenator to improve the asphalt pavement service state has become an increasing concern in recent years. This study mainly focuses on the diffusion analysis between rejuvenator and aged asphalt, and further rheological influences by addition of rejuvenators. First, two rejuvenators, oil rejuvenator (OR) and penetrative rejuvenator (PR), were prepared in the laboratory. Afterward, the diffused performance of rejuvenators was investigated by viscosity, contact angle, and three self-designed feasible test indexes, which were sinking time test, softening rate test, and gravitational collapsing test. Beside the comparison in physical properties tests of aged and rejuvenated asphalt, their rheological performances were also evaluated by dynamic shear rheometer (DSR) and bending beam rheometer (BBR) respectively. The results indicated that three proposed indexes can comparatively analyze the diffusion rate of different rejuvenators on aged asphalt effectively. Furthermore, all adopted test indexes signaled that PR has a faster diffusion rate and better penetrative efficiency. Comparatively, exceeding rejuvenator dosage would increase the rutting possibility. Nevertheless, 2.5 wt% addition dosage for both OR and PR into aged asphalt can promote appropriate improvement in physical properties and crack resistance. The study would supply a significant reference for penetrative rejuvenator preparation and its diffusing evaluation.

ACS Style

Fusong Wang; Lei Zhang; Boxiang Yan; Dezhi Kong; Yuanyuan Li; Shaopeng Wu. Diffusion Mechanism of Rejuvenator and Its Effects on the Physical and Rheological Performance of Aged Asphalt Binder. Materials 2019, 12, 4130 .

AMA Style

Fusong Wang, Lei Zhang, Boxiang Yan, Dezhi Kong, Yuanyuan Li, Shaopeng Wu. Diffusion Mechanism of Rejuvenator and Its Effects on the Physical and Rheological Performance of Aged Asphalt Binder. Materials. 2019; 12 (24):4130.

Chicago/Turabian Style

Fusong Wang; Lei Zhang; Boxiang Yan; Dezhi Kong; Yuanyuan Li; Shaopeng Wu. 2019. "Diffusion Mechanism of Rejuvenator and Its Effects on the Physical and Rheological Performance of Aged Asphalt Binder." Materials 12, no. 24: 4130.

Journal article
Published: 31 October 2019 in Fuel
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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.

ACS Style

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 Style

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.

Chicago/Turabian Style

Yuanyuan 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.

Journal article
Published: 30 July 2019 in Materials
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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.

ACS Style

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 Style

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 (15):2424.

Chicago/Turabian Style

Shaopeng 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.

Journal article
Published: 24 June 2019 in Construction and Building Materials
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To investigate the aging degradations of dominant wavelength of UV radiation on asphalt binder, five narrow-band UV radiations with different dominant wavelengths, namely 300, 320, 340, 360 and 380 nm, were used to age asphalt. After the UV aging, the aging degradations of the UV radiations on the chemical compositions, physical properties, rheological properties and complex viscosities of asphalt binder were tested by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), physical property test, and dynamic shear rheometer (DSR) respectively. The results show that all UV radiations, with the dominant wavelengths from 300 nm to 380 nm, can cause the aging degradations on the neat asphalt, UV aging can change the chemical compositions of asphalt, as well as the macro-performance of asphalt, such as physical and rheological performance. While, the molecules of asphalt have different susceptibilities to different wavelengths of UV radiations, different dominant wavelengths of UV radiations have different aging degradations on asphalt, it is not that a UV radiation with shorter wavelength (higher photon energy) definitely produces more serious aging effect on asphalt. Making into comparison, under the same aging condition, the asphalt binder aged by the UV – 360 has the highest aging degree, followed with the asphalt binders aged by UV – 340, UV – 320, UV – 300 and UV – 380, respectively.

ACS Style

Yuanyuan Li; Shaopeng Wu; Quantao Liu; Ying Dai; Chuangmin Li; Hechuan Li; Shuai Nie; Wei Song. Aging degradation of asphalt binder by narrow-band UV radiations with a range of dominant wavelengths. Construction and Building Materials 2019, 220, 637 -650.

AMA Style

Yuanyuan Li, Shaopeng Wu, Quantao Liu, Ying Dai, Chuangmin Li, Hechuan Li, Shuai Nie, Wei Song. Aging degradation of asphalt binder by narrow-band UV radiations with a range of dominant wavelengths. Construction and Building Materials. 2019; 220 ():637-650.

Chicago/Turabian Style

Yuanyuan Li; Shaopeng Wu; Quantao Liu; Ying Dai; Chuangmin Li; Hechuan Li; Shuai Nie; Wei Song. 2019. "Aging degradation of asphalt binder by narrow-band UV radiations with a range of dominant wavelengths." Construction and Building Materials 220, no. : 637-650.

Research article
Published: 25 April 2019 in Frontiers of Structural and Civil Engineering
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Modulus is one of the main parameters during the design of asphalt pavement structure, the newest specifications of China gives the dynamic moduli ranges of commonly used asphalt mixtures with base asphalt (BA) or styrene-butadiene-styrene modified asphalt (SBS MA), while the moduli ranges of mixtures with carbon black modified asphalt (CB MA) are not recommended. To investigate the CB effect on the dynamic moduli of CB MA mixtures, one commonly used asphalt mixture (AC-20) was designed with BA, SBS MA, and CB MA, respectively. Then, the uniaxial compression dynamic modulus tests were conducted at different temperatures and loading frequencies, the master curves of asphalt mixtures were analyzed based on the time-temperature equivalence principle. The results show that with increasing loading frequency, the temperature dependence of dynamic moduli of all asphalt mixtures tend to be less obvious. Both SBS and CB can decrease the temperature sensitivity of asphalt mixture, the SBS MA mixture has the lowest temperature sensitivity, followed by CB MA and BA mixture. In addition, CB and SBS can obviously improve the dynamic modulus of the BA mixture, enhance the anti-deformation performance of pavement structure, and the improvement effect of CB is almost the same with SBS.

ACS Style

Chuangmin Li; Fanbo Ning; Yuanyuan Li. Effect of carbon black on the dynamic moduli of asphalt mixtures and its master curves. Frontiers of Structural and Civil Engineering 2019, 13, 918 -925.

AMA Style

Chuangmin Li, Fanbo Ning, Yuanyuan Li. Effect of carbon black on the dynamic moduli of asphalt mixtures and its master curves. Frontiers of Structural and Civil Engineering. 2019; 13 (4):918-925.

Chicago/Turabian Style

Chuangmin Li; Fanbo Ning; Yuanyuan Li. 2019. "Effect of carbon black on the dynamic moduli of asphalt mixtures and its master curves." Frontiers of Structural and Civil Engineering 13, no. 4: 918-925.

Journal article
Published: 01 April 2019 in Materials
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Induction heating is a valuable technology to repair asphalt concrete damage inside. However, in the process of induction heating, induced particles will release a large amount of heat to act on asphalt binder in a short time. The purpose of this paper was to study the effect of induction heating on asphalt binder aging in steel fibers modified asphalt concrete. The experiments were divided into two parts: induction heating of Dramix steel fibers coated with asphalt binder (DA) and steel wool fibers modified asphalt concrete. After induction heating, the asphalt binders in the samples were extracted for testing aging indices with Fourier Transform Infrared (FTIR), Dynamic Shear Rheometer (DSR), and Four-Components Analysis (FCA) tests. The aging of asphalt binder was analyzed identifying the change of chemical structure, the diversification of rheological properties, and the difference of component. The experiments showed that the binder inside asphalt concrete began aging during induction heating due to thermal oxygen reaction and volatilization of light components. However, there was no peak value of the carbonyl index after induction heating of ten cycles, and the carbonyl index of DA was equivalent to that of binder in asphalt concrete after three induction heating cycles, which indicated the relatively closed environment inside asphalt concrete can inhibit the occurrence of the aging reaction.

ACS Style

Hechuan Li; Jianying Yu; Shaopeng Wu; Quantao Liu; Yuanyuan Li; Yaqi Wu; Haiqin Xu. Investigation of the Effect of Induction Heating on Asphalt Binder Aging in Steel Fibers Modified Asphalt Concrete. Materials 2019, 12, 1067 .

AMA Style

Hechuan Li, Jianying Yu, Shaopeng Wu, Quantao Liu, Yuanyuan Li, Yaqi Wu, Haiqin Xu. Investigation of the Effect of Induction Heating on Asphalt Binder Aging in Steel Fibers Modified Asphalt Concrete. Materials. 2019; 12 (7):1067.

Chicago/Turabian Style

Hechuan Li; Jianying Yu; Shaopeng Wu; Quantao Liu; Yuanyuan Li; Yaqi Wu; Haiqin Xu. 2019. "Investigation of the Effect of Induction Heating on Asphalt Binder Aging in Steel Fibers Modified Asphalt Concrete." Materials 12, no. 7: 1067.

Journal article
Published: 11 March 2019 in Construction and Building Materials
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This paper investigated the heating temperature field and gradient healing behavior of asphalt concrete contained steel fibers via induction heating. The heating temperature field of asphalt concrete by induction heating was studied with an infrared camera. The healing rate of the specimens in different healing conditions were investigated by testing the fracture resistance recovery after healing. In addition, the crack healing rate of asphalt concrete was studied by high-resolution 3D X-ray microscope (CT) to verify the effective healing depth. The results quantified the induction heating temperature field, related to heating distance and time. After 60 s induction heating, the temperature at 5 cm increased from 25 °C to 44.1 °C, and at 1 cm from 25 °C to 75.1 °C, which indicated that the closer to the coil, the faster the heating rate was. Laboratory beams experiments showed that there was obvious gradient healing behavior during induction heating, which was mainly related to the gradient distribution of temperature. After 60 s induction heating, the healing rate of each layer could be maintained at a high level, the upper layer was at 65% ∼ 75%, the middle layer was at 50% ∼ 60%, and the lower layer was at 40% ∼ 50%. Gradient heating and healing resulted in effective healing depth of asphalt concrete, which can be determined according to the temperature distribution and the softening point of the binder. It was also verified by the crack healing rate obtained from CT scanning. It was also found that the strength recovery was much lower than the crack healing rate due to the fracture of the stones.

ACS Style

Hechuan Li; Jianying Yu; Shaopeng Wu; Quantao Liu; Bin Li; Yuanyuan Li; Yaqi Wu. Study on the gradient heating and healing behaviors of asphalt concrete induced by induction heating. Construction and Building Materials 2019, 208, 638 -645.

AMA Style

Hechuan Li, Jianying Yu, Shaopeng Wu, Quantao Liu, Bin Li, Yuanyuan Li, Yaqi Wu. Study on the gradient heating and healing behaviors of asphalt concrete induced by induction heating. Construction and Building Materials. 2019; 208 ():638-645.

Chicago/Turabian Style

Hechuan Li; Jianying Yu; Shaopeng Wu; Quantao Liu; Bin Li; Yuanyuan Li; Yaqi Wu. 2019. "Study on the gradient heating and healing behaviors of asphalt concrete induced by induction heating." Construction and Building Materials 208, no. : 638-645.

Journal article
Published: 06 March 2019 in Construction and Building Materials
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More than ten kilometers of test road with the layered double hydroxides (LDHs) modified asphalt binder was constructed to field evaluate the LDHs effect on the aging resistance of asphalt concrete, after four years of road service, asphalt concrete specimens were collected from the compared road (without LDHs), test road (with LDHs) and tunnel (without LDHs), respectively. Then, 1.5 cm surface mixture of every specimen was cut into three layers to reclaim the asphalt binders, labeled as layer 1, layer 2 and layer 3 from surface to interior. The chemical structures and oxygen contents of reclaimed asphalt binders were investigated by the Fourier infrared spectrometer (FTIR) and elemental analyzer, respectively. Meanwhile, the dynamic shear rheometer (DSR) was conducted to study the rheological performance such as complex modulus, phase angle and viscosity of reclaimed asphalt binders. In addition, the three points bending test was conducted by universal testing machine (UTM) at the temperature of −10 °C, the parameters of bending strength (RB), bending strain (εB) and bending modulus (SB) were used to evaluate the low temperature crack resistance of asphalt concrete from all these three sections respectively. The results show that, with the increase of pavement depth, the aging degree of asphalt concrete tends to decrease; the aging depth of asphalt pavement in field is within 1.0 cm. LDHs can not only decrease the aging rate of the surface asphalt concrete, but also decrease the rate of the aging diffuses into the inner of asphalt pavement, the chemical structures and technical performance of LDHs modified asphalt binders are closer to the initial status of which. The values of RB and SB of asphalt concretes from both test road and tunnel are lower than that of asphalt concretes from compared road, meanwhile, the values of εB of asphalt concretes from test road and tunnel are higher. The low temperature crack resistances of asphalt concretes of tunnel and test road are much better than that of compared road. Hence, LDHs can significantly improve the aging resistance of asphalt concrete in field.

ACS Style

Yuanyuan Li; Shaopeng Wu; Quantao Liu; Shuai Nie; Hechuan Li; Ying Dai; Ling Pang; Chuangmin Li; Aoming Zhang. Field evaluation of LDHs effect on the aging resistance of asphalt concrete after four years of road service. Construction and Building Materials 2019, 208, 192 -203.

AMA Style

Yuanyuan Li, Shaopeng Wu, Quantao Liu, Shuai Nie, Hechuan Li, Ying Dai, Ling Pang, Chuangmin Li, Aoming Zhang. Field evaluation of LDHs effect on the aging resistance of asphalt concrete after four years of road service. Construction and Building Materials. 2019; 208 ():192-203.

Chicago/Turabian Style

Yuanyuan Li; Shaopeng Wu; Quantao Liu; Shuai Nie; Hechuan Li; Ying Dai; Ling Pang; Chuangmin Li; Aoming Zhang. 2019. "Field evaluation of LDHs effect on the aging resistance of asphalt concrete after four years of road service." Construction and Building Materials 208, no. : 192-203.

Article
Published: 01 March 2019 in International Journal of Pavement Research and Technology
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Due to the segregation of asphalt pavement, the damage of asphalt pavement always starts from locality. The viscosity of the 30# asphalt is always relative higher, which may cause more worries about the segregation of the 30# asphalt mixtures. During the construction of Jin-Hai highway in Fujian province of China, three test roads were constructed, two of them were constructed with the 30# low penetration asphalt and one with SBS modified asphalt. Other factors, such as different construction technologies, source of asphalt, sources of aggregates and types of bearing layers, may affect the segregation of asphalt pavement were also investigated. In addition, two calibration methods were investigated to ensure a better calibration method for the calibration of the pavement quality indicator (PQI). The results show that it is of great benefits to use PQI as an on-site monitoring during the construction of asphalt pavement, the Method 1 is recommended as the calibration method for the PQI. The 30# low penetration asphalt mixture has a good construction performance, the 5.5 cm thickness of 30# low penetration asphalt concrete will not appear some specific segregation situations by the trapezoid paving method.

ACS Style

Chuangmin Li; Fanbo Ning; Xinzhong Gan; Yuanyuan Li; Hechuan Li. Evaluation of the field segregation of asphalt pavement with 30# low penetration asphalt binder. International Journal of Pavement Research and Technology 2019, 12, 139 -146.

AMA Style

Chuangmin Li, Fanbo Ning, Xinzhong Gan, Yuanyuan Li, Hechuan Li. Evaluation of the field segregation of asphalt pavement with 30# low penetration asphalt binder. International Journal of Pavement Research and Technology. 2019; 12 (2):139-146.

Chicago/Turabian Style

Chuangmin Li; Fanbo Ning; Xinzhong Gan; Yuanyuan Li; Hechuan Li. 2019. "Evaluation of the field segregation of asphalt pavement with 30# low penetration asphalt binder." International Journal of Pavement Research and Technology 12, no. 2: 139-146.

Journal article
Published: 30 January 2019 in Polymer Testing
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To investigate the effects of different wavelength ranges of UV lights on chemical compositions and macro-properties of asphalt, three UV lights were used to conduct the aging test of asphalt for 1–288 h. The elemental analysis and Fourier transform infrared spectroscopy (FTIR) were performed to analyze the chemical changes of asphalt, the surface micro-topographies of asphalt before and after UV aging were studied by atomic force microscopy (AFM). In addition, the physical performance, viscosity and rheological performance of asphalt was studied with softening point test and dynamic shear rheometer (DSR), respectively. The chemical compositions and structures analyses show that the oxidation mechanism exists during the UV aging of asphalt binder. The numbers of bee-like structures in AFM height figures decrease obviously after UV aging, meanwhile the sizes of which increase. The relationships of RCC, RCS and SPI values with UV expose time follow a power function model in the first 24 h, while follows a liner model after 24 h. UV lights with different wavelength ranges have significantly different effects on the chemical compositions and macro-properties of asphalt. The UV 350–370 nm has the most obvious aging effect on asphalt binder, second is the UV 340–380 nm, the UV 200–400 nm has the lightest aging effect.

ACS Style

Yuanyuan Li; Shaopeng Wu; Quantao Liu; Jun Xie; Hechuan Li; Ying Dai; Chuangmin Li; Shuai Nie; Wei Song. Aging effects of ultraviolet lights with same dominant wavelength and different wavelength ranges on a hydrocarbon-based polymer (asphalt). Polymer Testing 2019, 75, 64 -75.

AMA Style

Yuanyuan Li, Shaopeng Wu, Quantao Liu, Jun Xie, Hechuan Li, Ying Dai, Chuangmin Li, Shuai Nie, Wei Song. Aging effects of ultraviolet lights with same dominant wavelength and different wavelength ranges on a hydrocarbon-based polymer (asphalt). Polymer Testing. 2019; 75 ():64-75.

Chicago/Turabian Style

Yuanyuan Li; Shaopeng Wu; Quantao Liu; Jun Xie; Hechuan Li; Ying Dai; Chuangmin Li; Shuai Nie; Wei Song. 2019. "Aging effects of ultraviolet lights with same dominant wavelength and different wavelength ranges on a hydrocarbon-based polymer (asphalt)." Polymer Testing 75, no. : 64-75.

Research article
Published: 08 November 2018 in Construction and Building Materials
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Phase change materials (PCMs) can be used as thermal regulation units to prevent thermal diseases of asphalt pavements. However, the effects of PCMs on the thermal and rheological properties of asphalt binders still need to be further studied. Therefore, the influence of an expanded graphite/polyethylene glycol composite phase change material (EP-CPCM) on the thermal and rheological performance of a Pen 60/80 base binder and a SBS modified binder were investigated in this research. Various experiments were conducted, and the thermal constants analyses show that the thermal conductivity gaps of the EP-CPCM modified base and SBS asphalt binders are lower than 8%, indicating a favorable compatibility between EP-CPCM and the asphalt binders. The thermal conductivity and thermal diffusivity of base and SBS binders are doubled after the incorporation of EP-CPCM, which ensures a rapid heat exchange with the ambient environment. Differential scanning calorimeter (DSC) results indicate that the melting and crystallization enthalpies of the EP-CPCM modified base binders are 13.77 J/g and 10.22 J/g respectively, meanwhile, the melting and crystallization enthalpies of the SBS binders are 14.63 J/g and 13.59 J/g respectively. The heating and cooling rate of the modified binders are separately reduced at the temperature range of 40–50 °C and 35–25 °C because of the phase transition of EP-CPCM. Dynamic shear rheometer (DSR) results reveal that both the rutting parameter G*/sinδ and the fatigue parameter G*sinδ of the modified binders are increased when the EP-CPCM is added, indicating the rutting resistance is improved while the fatigue resistance is damaged. Bending beam rheometer (BBR) tests show that the addition of EP-CPCM results in the decrease in the creep rate and the increase in the creep stiffness of the modified binders, and both effects are detrimental to the prevention of low-temperature cracking.

ACS Style

Dong Zhang; Meizhu Chen; Shaopeng Wu; Martin Riara; Jiuming Wan; Yuanyuan Li. Thermal and rheological performance of asphalt binders modified with expanded graphite/polyethylene glycol composite phase change material (EP-CPCM). Construction and Building Materials 2018, 194, 83 -91.

AMA Style

Dong Zhang, Meizhu Chen, Shaopeng Wu, Martin Riara, Jiuming Wan, Yuanyuan Li. Thermal and rheological performance of asphalt binders modified with expanded graphite/polyethylene glycol composite phase change material (EP-CPCM). Construction and Building Materials. 2018; 194 ():83-91.

Chicago/Turabian Style

Dong Zhang; Meizhu Chen; Shaopeng Wu; Martin Riara; Jiuming Wan; Yuanyuan Li. 2018. "Thermal and rheological performance of asphalt binders modified with expanded graphite/polyethylene glycol composite phase change material (EP-CPCM)." Construction and Building Materials 194, no. : 83-91.

Journal article
Published: 10 September 2018 in Construction and Building Materials
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To improve the compatibility of layered double hydroxides (LDHs) with asphalt binders, the sodium stearate was used to organically modify the LDHs (SS-LDHs). In order to investigate the improvement effects of LDHs and SS-LDHs on the aging resistance of asphalt mixtures in laboratory and field, two kinds of aging simulating tests were conducted in laboratory and a test road was paved with LDHs and SS-LDHs modified asphalt mixtures, respectively. The chemical structure and viscosity of asphalt binders reclaimed from asphalt mixtures were tested by Fourier transform infrared spectroscopy and Brookfield viscometer respectively to investigate the LDHs and SS-LDHs effects on the anti aging properties of asphalt mixtures. Finally, the semi-circular bending test was conducted by universal testing machine to test the blending strength and fatigue life of asphalt mixture before and after aging. The results show that, at the same aging condition, the carbonyl index and viscosity aging index of reclaimed asphalt binders with LDHs or SS-LDHs are lower than that of reclaimed asphalt binders without LDHs and SS-LDHs, while the styrene-butadienestyrene index is higher, the increment of semi-circle flexural strength and the reduction of fatigue life is less than that of asphalt mixtures without LDHs and SS-LDHs, which indicates that LDHs and SS-LDHs can improve the anti thermo-oxidative aging and anti UV aging performance of the asphalt mixture. In comparison, the improvement effect of SS-LDHs on the anti aging performance of asphalt mixture is much better than that of LDHs.

ACS Style

Yuanyuan Li; Shaopeng Wu; Ying Dai; Ling Pang; Quantao Liu; Shuai Nie; Hechuan Li; Zengfeng Wang. Laboratory and field evaluation of sodium stearate organically modified LDHs effect on the anti aging performance of asphalt mixtures. Construction and Building Materials 2018, 189, 366 -374.

AMA Style

Yuanyuan Li, Shaopeng Wu, Ying Dai, Ling Pang, Quantao Liu, Shuai Nie, Hechuan Li, Zengfeng Wang. Laboratory and field evaluation of sodium stearate organically modified LDHs effect on the anti aging performance of asphalt mixtures. Construction and Building Materials. 2018; 189 ():366-374.

Chicago/Turabian Style

Yuanyuan Li; Shaopeng Wu; Ying Dai; Ling Pang; Quantao Liu; Shuai Nie; Hechuan Li; Zengfeng Wang. 2018. "Laboratory and field evaluation of sodium stearate organically modified LDHs effect on the anti aging performance of asphalt mixtures." Construction and Building Materials 189, no. : 366-374.

Journal article
Published: 11 June 2018 in Materials
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The properties of asphalt pavement are damaged under the effects of moisture. The pH value and salt concentration of water are the key factors that affect the chemical and rheological properties of asphalt during moisture damage. Four kinds of water solutions, including distilled water, an acidic solution, alkaline solution and saline solution were used to investigate the effects of aqueous solute compositions on the chemical and rheological properties of asphalt. Thin-layer chromatography with flame ionization detection (TLC-FID), Fourier transform infrared (FTIR) spectroscopy and dynamic shear rheometer (DSR) were applied to investigate the components, chemistry and rheology characteristics of asphalt specimens before and after water solute exposure. The experimental results show that moisture damage of asphalt is not only associated with an oxidation process between asphalt with oxygen, but it is also highly dependent on some compounds of asphalt dissolving and being removed in the water solutions. In detail, after immersion in water solute, the fraction of saturates, aromatics and resins in asphalt binders decreased, while asphaltenes increased; an increase in the carbonyl and sulphoxide indices, and a decrease in the butadiene index were also found from the FTIR analyzer test. The rheological properties of asphalt are sensitive to water solute immersing. The addition of aqueous solutes causes more serious moisture damage on asphalt binders, with the pH11 solution presenting as the most destructive during water solute exposure.

ACS Style

Ling Pang; Xuemei Zhang; Shaopeng Wu; Yong Ye; Yuanyuan Li. Influence of Water Solute Exposure on the Chemical Evolution and Rheological Properties of Asphalt. Materials 2018, 11, 983 .

AMA Style

Ling Pang, Xuemei Zhang, Shaopeng Wu, Yong Ye, Yuanyuan Li. Influence of Water Solute Exposure on the Chemical Evolution and Rheological Properties of Asphalt. Materials. 2018; 11 (6):983.

Chicago/Turabian Style

Ling Pang; Xuemei Zhang; Shaopeng Wu; Yong Ye; Yuanyuan Li. 2018. "Influence of Water Solute Exposure on the Chemical Evolution and Rheological Properties of Asphalt." Materials 11, no. 6: 983.

Journal article
Published: 07 May 2018 in Materials
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The aging effect of ultraviolet (UV) radiation on bitumen has gained increasing attention from researchers, resulting in the emergence of a new method to simulate the UV aging that occurs during the service life of bitumen. However, the UV aging degree is closely related to bitumen thickness and the effect of UV radiation on aging depth is not clear. The relationship between ultraviolet (UV) radiation and bitumen UV aging depth was investigated in this paper. Three groups of samples were UV aged using different aging procedures to investigate the bitumen aging mechanism of UV radiation. The results from the first group showed that UV aging depth increased along with aging time. After aging for five hours, the complex modulus of the second and third layers increased. The second group’s results indicated that the aging effect of ozone was small and that the increase in aging depth was uncorrelated with ozone. The results from the third group showed that the transmittance of bitumen increased after UV aging and that the real reason why aging depth increased was permeation.

ACS Style

Jinxuan Hu; Shaopeng Wu; Quantao Liu; Maria Inmaculada García Hernández; Wenbo Zeng; Shuai Nie; Jiuming Wan; Dong Zhang; Yuanyuan Li. The Effect of Ultraviolet Radiation on Bitumen Aging Depth. Materials 2018, 11, 747 .

AMA Style

Jinxuan Hu, Shaopeng Wu, Quantao Liu, Maria Inmaculada García Hernández, Wenbo Zeng, Shuai Nie, Jiuming Wan, Dong Zhang, Yuanyuan Li. The Effect of Ultraviolet Radiation on Bitumen Aging Depth. Materials. 2018; 11 (5):747.

Chicago/Turabian Style

Jinxuan Hu; Shaopeng Wu; Quantao Liu; Maria Inmaculada García Hernández; Wenbo Zeng; Shuai Nie; Jiuming Wan; Dong Zhang; Yuanyuan Li. 2018. "The Effect of Ultraviolet Radiation on Bitumen Aging Depth." Materials 11, no. 5: 747.