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Ling Pang
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

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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: 20 February 2020 in Construction and Building Materials
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Asphalt pavement will be damaged under the action of asphalt aging and moisture damage. Water solution erosion degree is closely related to the aging of asphalt and degradation of the adhesive strength between asphalt and aggregate. In view of this, this paper investigated the effect of water solution erosion on rheological, cohesion and adhesion properties of virgin and aged asphalt. The experiment was performed by immersing asphalt into five different water solutions (includes distilled water, acid solution, alkali solution, sodium chloride solution and sodium sulfate solution) for different time, which was considered to be fully reflect the real service condition within an asphalt pavement in different areas. The rheological properties were evaluated by dynamic shear rheometer (DSR), the cohesion and adhesion properties based on the surface free energy test were got by sessile drop method. Meanwhile, the relationships between asphalt rheological, cohesion and adhesion properties with aqueous solute and water solution erosion time were studied. The effects of water solution erosion on virgin asphalt and its PAV aged asphalt were compared. It was observed that water solution erosion resulted in the increased of asphalt elastic component and stiffness, decreased of asphalt fatigue life and the cohesive force and adhesion to aggregates. This trend was reduced to some extent with the presence of acid, alkali, and salt solutes. Under the action of water solution erosion, PAV aged asphalt showed a worse resistance to water solution erosion. And unlike heat-aging and ultraviolet-aging, the development trends of rheological, cohesion and adhesion properties of asphalt were more complex and variable with the change of asphalt surface component.

ACS Style

Hao Yang; Ling Pang; Yingxue Zou; Quantao Liu; Jun Xie. The effect of water solution erosion on rheological, cohesion and adhesion properties of asphalt. Construction and Building Materials 2020, 246, 118465 .

AMA Style

Hao Yang, Ling Pang, Yingxue Zou, Quantao Liu, Jun Xie. The effect of water solution erosion on rheological, cohesion and adhesion properties of asphalt. Construction and Building Materials. 2020; 246 ():118465.

Chicago/Turabian Style

Hao Yang; Ling Pang; Yingxue Zou; Quantao Liu; Jun Xie. 2020. "The effect of water solution erosion on rheological, cohesion and adhesion properties of asphalt." Construction and Building Materials 246, no. : 118465.

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.

Journal article
Published: 11 October 2018 in Materials
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When a fire occurs in a tunnel, the instantaneous high temperature and smoke cause great danger to people. Therefore, the asphalt pavement material in the tunnel must have sufficient fire resistance. In this study, the effects of aluminum hydroxide and layered double hydroxide on the fire resistance of styrene-butadiene-styrene (SBS) polymer-modified asphalt was investigated. The fire resistance of the asphalt was evaluated by using a limiting oxygen index (LOI). The impact of aluminum hydroxide (ATH), layered double hydroxide (LDHs), and mixed flame retardant (MFR) on LOI was studied. The synergistic fire resistance mechanism of ATH and LDHs in asphalt binder was analyzed by using an integrated thermal analyzer‒mass spectrometry combined system (TG-DSC-MS) and Fourier transform infrared spectrometer (FTIR). The experimental results indicated that the main active temperature range of these flame retardants was 221–483 °C. The main components of smoke were methane, hydroxyl, water, carbon monoxide, aldehyde, carbon dioxide, etc. The addition of flame retardants could inhibit the production of methane, carbon monoxide, and aldehyde. Moreover, due to the good synergistic effects of ATH and LDHs, 20 wt % MFR had the best fire resistance.

ACS Style

Menglin Li; Ling Pang; Meizhu Chen; Jun Xie; Quantao Liu. Effects of Aluminum Hydroxide and Layered Double Hydroxide on Asphalt Fire Resistance. Materials 2018, 11, 1939 .

AMA Style

Menglin Li, Ling Pang, Meizhu Chen, Jun Xie, Quantao Liu. Effects of Aluminum Hydroxide and Layered Double Hydroxide on Asphalt Fire Resistance. Materials. 2018; 11 (10):1939.

Chicago/Turabian Style

Menglin Li; Ling Pang; Meizhu Chen; Jun Xie; Quantao Liu. 2018. "Effects of Aluminum Hydroxide and Layered Double Hydroxide on Asphalt Fire Resistance." Materials 11, no. 10: 1939.

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: 27 April 2018 in Materials
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Diatomite is an inorganic natural resource in large reserve. This study consists of two phases to evaluate the effects of diatomite on asphalt mixtures. In the first phase, we characterized the diatomite in terms of mineralogical properties, chemical compositions, particle size distribution, mesoporous distribution, morphology, and IR spectra. In the second phase, road performances, referring to the permanent deformation, crack, fatigue, and moisture resistance, of asphalt mixtures with diatomite were investigated. The characterization of diatomite exhibits that it is a porous material with high SiO2 content and large specific surface area. It contributes to asphalt absorption and therefore leads to bonding enhancement between asphalt and aggregate. However, physical absorption instead of chemical reaction occurs according to the results of FTIR. The resistance of asphalt mixtures with diatomite to permanent deformation and moisture are superior to those of the control mixtures. But, the addition of diatomite does not help to improve the crack and fatigue resistance of asphalt mixture.

ACS Style

Chao Yang; Jun Xie; Xiaojun Zhou; Quantao Liu; Ling Pang. Performance Evaluation and Improving Mechanisms of Diatomite-Modified Asphalt Mixture. Materials 2018, 11, 686 .

AMA Style

Chao Yang, Jun Xie, Xiaojun Zhou, Quantao Liu, Ling Pang. Performance Evaluation and Improving Mechanisms of Diatomite-Modified Asphalt Mixture. Materials. 2018; 11 (5):686.

Chicago/Turabian Style

Chao Yang; Jun Xie; Xiaojun Zhou; Quantao Liu; Ling Pang. 2018. "Performance Evaluation and Improving Mechanisms of Diatomite-Modified Asphalt Mixture." Materials 11, no. 5: 686.

Journal article
Published: 05 April 2018 in Construction and Building Materials
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Layered double hydroxide (LDH) could improve the aging resistance of an asphalt binder. However, the previous work all arbitrarily selected only one dosage of LDH such as 3% or 5%, which could not be enough to know the effect of LDH and its dosage on the pavement performance and aging resistance of an asphalt binder accurately, it is important to investigate the LDH effect on the properties of asphalt from more widely ranges of dosages. Meanwhile, the LDH and asphalt binder interaction is still unclear. In this paper, six dosages (from 2% to 7%) of Mg-Al-CO32−-LDH were conducted to modify the styrene-butadienestyrene modified asphalt (SBS MA). The Fourier transform infrared spectroscopy (FTIR) and X ray diffraction (XRD) results indicate that there is no chemical reaction between LDH and SBS MA, the blending of LDH and SBS MA is a physical way. The rheological properties of SBS MA are studied by both dynamic shear rheometer (DSR) and bending beams rheometer (BBR), the results show that LDH can improve the high temperature performance of SBS MA, and does not significantly weaken other properties of SBS MA by controlling LDH dosage to be lower than 4%. The FTIR, complex modulus and VAI results show that LDH can significantly improve both the thermal oxide aging and UV aging resistances of SBS MA. LDH dosage of 4% is suggested to be the optimal dosage after considering the effect of LDH on the aging resistance and pavement performance of asphalt binder.

ACS Style

Yuanyuan Li; Shaopeng Wu; Ling Pang; Quantao Liu; Zengfeng Wang; Aoming Zhang. Investigation of the effect of Mg-Al-LDH on pavement performance and aging resistance of styrene-butadiene-styrene modified asphalt. Construction and Building Materials 2018, 172, 584 -596.

AMA Style

Yuanyuan Li, Shaopeng Wu, Ling Pang, Quantao Liu, Zengfeng Wang, Aoming Zhang. Investigation of the effect of Mg-Al-LDH on pavement performance and aging resistance of styrene-butadiene-styrene modified asphalt. Construction and Building Materials. 2018; 172 ():584-596.

Chicago/Turabian Style

Yuanyuan Li; Shaopeng Wu; Ling Pang; Quantao Liu; Zengfeng Wang; Aoming Zhang. 2018. "Investigation of the effect of Mg-Al-LDH on pavement performance and aging resistance of styrene-butadiene-styrene modified asphalt." Construction and Building Materials 172, no. : 584-596.

Journal article
Published: 04 April 2018 in Construction and Building Materials
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The layered double hydroxides (LDHs) has been widely used as the anti-aging modifier to improve the anti aging performance of an asphalt binder, but for the different chemical and physical properties of LDHs with asphalt binder, the compatibility of them is not very well, therefore the best modification effect can not be obtained. The sodium stearate was designated to organically modify the LDHs to enhance its improvement effect on the anti aging performance of asphalt binder. The modern test instruments such as Fourier transform infrared spectroscopy, X-ray diffractometer, scanning electron microscopy, ultraviolet visible spectrophotometer were used to investigate the sodium stearate effect on the characteristics of LDHs. In addition, the LDHs modified styrene–butadienestyrene modified asphalt (LDHs/SBS MA) and sodium stearate organically modified LDHs (SS-LDHs) modified styrene–butadienestyrene modified asphalt (SS-LDHs/SBS MA) were prepared by the melt blending method, the thin film oven test and UV aging test were conducted to simulate the short term thermo-oxidative aging and UV aging of asphalt binder respectively. Finally, the chemical structure, viscosity, and complex modulus of LDHs/SBS MA and SS-LDHs/SBS MA before and after aging were tested respectively. The results show that the sodium stearate can improve the compatibility of LDHs with styrene–butadienestyrene modified asphalt binder (SBS MA). Both LDHs and SS-LDHs can improve the anti thermo-oxidative aging and anti UV aging performance of SBS MA. Notably, the improvement effect of SS-LDHs on the anti aging performance of SBS MA is much better than that of LDHs.

ACS Style

Yuanyuan Li; Shaopeng Wu; Ying Dai; Ling Pang; Quantao Liu; Jun Xie; Dezhi Kong. Investigation of sodium stearate organically modified LDHs effect on the anti aging properties of asphalt binder. Construction and Building Materials 2018, 172, 509 -518.

AMA Style

Yuanyuan Li, Shaopeng Wu, Ying Dai, Ling Pang, Quantao Liu, Jun Xie, Dezhi Kong. Investigation of sodium stearate organically modified LDHs effect on the anti aging properties of asphalt binder. Construction and Building Materials. 2018; 172 ():509-518.

Chicago/Turabian Style

Yuanyuan Li; Shaopeng Wu; Ying Dai; Ling Pang; Quantao Liu; Jun Xie; Dezhi Kong. 2018. "Investigation of sodium stearate organically modified LDHs effect on the anti aging properties of asphalt binder." Construction and Building Materials 172, no. : 509-518.

Journal article
Published: 01 January 2018 in Construction and Building Materials
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ACS Style

Wenbo Zeng; Shaopeng Wu; Ling Pang; Haohao Chen; Jinxuan Hu; Yihan Sun; Zongwu Chen. Research on Ultra Violet (UV) aging depth of asphalts. Construction and Building Materials 2018, 160, 620 -627.

AMA Style

Wenbo Zeng, Shaopeng Wu, Ling Pang, Haohao Chen, Jinxuan Hu, Yihan Sun, Zongwu Chen. Research on Ultra Violet (UV) aging depth of asphalts. Construction and Building Materials. 2018; 160 ():620-627.

Chicago/Turabian Style

Wenbo Zeng; Shaopeng Wu; Ling Pang; Haohao Chen; Jinxuan Hu; Yihan Sun; Zongwu Chen. 2018. "Research on Ultra Violet (UV) aging depth of asphalts." Construction and Building Materials 160, no. : 620-627.

Journal article
Published: 01 October 2017 in Construction and Building Materials
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ACS Style

Jiasheng Li; Jianying Yu; Shaopeng Wu; Ling Pang; Serji Amirkhanian; Meiling Zhao. Effect of inorganic ultraviolet resistance nanomaterials on the physical and rheological properties of bitumen. Construction and Building Materials 2017, 152, 832 -838.

AMA Style

Jiasheng Li, Jianying Yu, Shaopeng Wu, Ling Pang, Serji Amirkhanian, Meiling Zhao. Effect of inorganic ultraviolet resistance nanomaterials on the physical and rheological properties of bitumen. Construction and Building Materials. 2017; 152 ():832-838.

Chicago/Turabian Style

Jiasheng Li; Jianying Yu; Shaopeng Wu; Ling Pang; Serji Amirkhanian; Meiling Zhao. 2017. "Effect of inorganic ultraviolet resistance nanomaterials on the physical and rheological properties of bitumen." Construction and Building Materials 152, no. : 832-838.

Journal article
Published: 07 July 2017 in Applied Sciences
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Graphene oxide (GO) has a unique layered structure with excellent gas and liquid blocking properties. It is widely used in many areas, such as gas sensors, carbon-based electronics, impermeable membranes, and polymeric composite materials. In order to evaluate whether GO (1% and 3% by weight of asphalt) can improve the aging resistance performance of the asphalt, 80/100 penetration grade asphalt (90 A) and styrene–butadiene–styrene modified asphalt (SBS MA) were used to prepare the GO modified asphalt by the melt blending method. The surface morphology of the GO was analyzed by scanning electron microscope (SEM). The UV aging test was conducted to simulate the aging during the service period. After UV aging test, the physical performances of GO-modified asphalts were tested, and the IC=O and IS=O increments were tested by Fourier transform infrared spectroscopy (FTIR) to evaluate the aging resistance performance of the GO modified asphalt. In addition, the rheological properties of GO modified asphalts were studied using a dynamic shear rheometer (DSR). The SEM analysis indicated that the GO exhibits many shared edges, and no agglomeration phenomenon was found. With respect to the physical performance test, the FTIR and the DSR results show that GO can improve the UV aging resistance performance of 90 A and SBS MA. In addition, the analysis indicated that the improvement effect of 3% GO is better than the 1% GO. The testing on the rheological properties of the modified asphalt indicated that the GO can also improve the thermo-oxidative aging resistance performance of asphalt.

ACS Style

Shaopeng Wu; Zhijie Zhao; Yuanyuan Li; Ling Pang; Serji Amirkhanian; Martin Riara. Evaluation of Aging Resistance of Graphene Oxide Modified Asphalt. Applied Sciences 2017, 7, 702 .

AMA Style

Shaopeng Wu, Zhijie Zhao, Yuanyuan Li, Ling Pang, Serji Amirkhanian, Martin Riara. Evaluation of Aging Resistance of Graphene Oxide Modified Asphalt. Applied Sciences. 2017; 7 (7):702.

Chicago/Turabian Style

Shaopeng Wu; Zhijie Zhao; Yuanyuan Li; Ling Pang; Serji Amirkhanian; Martin Riara. 2017. "Evaluation of Aging Resistance of Graphene Oxide Modified Asphalt." Applied Sciences 7, no. 7: 702.

Journal article
Published: 01 June 2017 in Materials Science Forum
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Effect of aging on physical properties of asphalt binder was studied. The relationship between degradation of the low temperature properties of asphalt binder and asphalt mixture was also investigated. After the thin film oven test (TFOT) with different aging time, the AH-70 binder and the SBS modified asphalt binder were used to prepared asphalt mixture samples. The binder was characterized using penetration, ductility and Beam Bending Rheometer (BBR), and the low temperature cracking resistance of asphalt mixture was studied by Three-point Bending Fracture (TBF). The correlation between different physical parameters of binder, as well as between different aging properties of the binder and asphalt mixture, was examined. The results showed that aging influenced binder physics significantly, and resulted in a decline in the properties of low temperature cracking resistance of asphalt mixture. Although, aging susceptibility of binder and asphalt mixture may be ranked differently when different evaluation methods ware used, a strong correlation was observed between the aging of binder and asphalt mixture.

ACS Style

Zhang Chao Cui; Ling Pang; Nai Zhi Zhang; Xue Mei Zhang; He Chuan Li. Effects of Aging on the Low Temperature Properties of Asphalt Binder and its Mixture. Materials Science Forum 2017, 898, 2018 -2022.

AMA Style

Zhang Chao Cui, Ling Pang, Nai Zhi Zhang, Xue Mei Zhang, He Chuan Li. Effects of Aging on the Low Temperature Properties of Asphalt Binder and its Mixture. Materials Science Forum. 2017; 898 ():2018-2022.

Chicago/Turabian Style

Zhang Chao Cui; Ling Pang; Nai Zhi Zhang; Xue Mei Zhang; He Chuan Li. 2017. "Effects of Aging on the Low Temperature Properties of Asphalt Binder and its Mixture." Materials Science Forum 898, no. : 2018-2022.

Journal article
Published: 15 April 2017 in Materials
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SBS (styrene-butadiene-styrene block copolymer) modified bitumen is one of most widely used polymer modified bitumens in China. It is also not satisfactory when subjected to extreme conditions. Multiple-walled carbon nanotubes, as a type of advanced nanomaterial, are investigated extensively because of their strong adsorption capacity. Little research has been done about MWCNTs/SBS modified bitumen, and in view of this, the performance and modification mechanism of MWCNTs/SBS modified bitumen was investigated in this paper. Conventional bitumen tests, Brookfield viscosity, bending beam rheometer, and dynamic shear rheometer tests showed improved performance at high and low temperature. The optimum MWCNTs content was determined as 1.0%. FT-IR, bitumen four components, and thermal analysis tests were conducted and revealed that the addition of MWCNTs led to a decrease in the content of light components. In addition, the rate of decomposition and volatilization of saturates and aromatics was reduced and better thermal stability of bitumen was found. Fluorescence microscopy tests showed that MWCNTs improved the dispersion of SBS and storage stability of the binder. Finally a schematic was proposed to explain how MWCNTs improved the performance of SBS modified bitumen through their strong adsorption property created by π–π intermolecular forces.

ACS Style

Benan Shu; Shaopeng Wu; Ling Pang; Barugahare Javilla. The Utilization of Multiple-Walled Carbon Nanotubes in Polymer Modified Bitumen. Materials 2017, 10, 416 .

AMA Style

Benan Shu, Shaopeng Wu, Ling Pang, Barugahare Javilla. The Utilization of Multiple-Walled Carbon Nanotubes in Polymer Modified Bitumen. Materials. 2017; 10 (4):416.

Chicago/Turabian Style

Benan Shu; Shaopeng Wu; Ling Pang; Barugahare Javilla. 2017. "The Utilization of Multiple-Walled Carbon Nanotubes in Polymer Modified Bitumen." Materials 10, no. 4: 416.

Journal article
Published: 07 January 2017 in Materials
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In the advanced research fields of solar cell and energy storing materials, graphene and graphene oxide (GO) are two of the most promising materials due to their high specific surface area, and excellent electrical and physical properties. However, they was seldom studied in the traditional materials because of their high cost. Nowadays, graphene and GO are much cheaper than before with the development of production technologies, which provides the possibility of using these extraordinary materials in the traditional construction industry. In this paper, GO was selected as a nano-material to modify two different asphalts. Then a thin film oven test and a pressure aging vessel test were applied to simulate the aging of GO-modified asphalts. After thermal aging, basic physical properties (softening point and penetration) were tested for the samples which were introduced at different mass ratios of GO (1% and 3%) to asphalt. In addition, rheological properties were tested to investigate how GO could influence the asphalts by dynamic shearing rheometer tests. Finally, some interesting findings and potential utilization (warm mixing and flame retardants) of GO in asphalt pavement construction were explained.

ACS Style

Wenbo Zeng; Shaopeng Wu; Ling Pang; Yihan Sun; Zongwu Chen. The Utilization of Graphene Oxide in Traditional Construction Materials: Asphalt. Materials 2017, 10, 48 .

AMA Style

Wenbo Zeng, Shaopeng Wu, Ling Pang, Yihan Sun, Zongwu Chen. The Utilization of Graphene Oxide in Traditional Construction Materials: Asphalt. Materials. 2017; 10 (1):48.

Chicago/Turabian Style

Wenbo Zeng; Shaopeng Wu; Ling Pang; Yihan Sun; Zongwu Chen. 2017. "The Utilization of Graphene Oxide in Traditional Construction Materials: Asphalt." Materials 10, no. 1: 48.

Journal article
Published: 01 September 2014 in Construction and Building Materials
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ACS Style

Ling Pang; Kuangyi Liu; Shaopeng Wu; Min Lei; Zongwu Chen. Effect of LDHs on the aging resistance of crumb rubber modified asphalt. Construction and Building Materials 2014, 67, 239 -243.

AMA Style

Ling Pang, Kuangyi Liu, Shaopeng Wu, Min Lei, Zongwu Chen. Effect of LDHs on the aging resistance of crumb rubber modified asphalt. Construction and Building Materials. 2014; 67 ():239-243.

Chicago/Turabian Style

Ling Pang; Kuangyi Liu; Shaopeng Wu; Min Lei; Zongwu Chen. 2014. "Effect of LDHs on the aging resistance of crumb rubber modified asphalt." Construction and Building Materials 67, no. : 239-243.

Research article
Published: 07 April 2014 in Advances in Materials Science and Engineering
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This study investigated the influence of layered double hydroxides (LDHs) on the fatigue properties of asphalt mixture. In this paper, different aging levels (thin film oven test (TFOT) and ultraviolet radiation aging (UV aging for short)) of bitumen modified with various mass ratios of the LDHs were investigated. The TFOT and UV aging process were used to simulate short-term field thermal-oxidative aging and long-term field light UV aging of bitumen, respectively. The influences of LDHs on the fatigue properties of LDHs were evaluated by dynamic shear rheometer (DSR) and indirect tensile fatigue test. Results indicated that the introduction of LDHs could change the fatigue properties of bitumen under a stress control mode. The mixture with modified bitumen showed better fatigue resistance than the mixture with base bitumen. The results illustrated that the LDHs would be alternative modifiers used in the bitumen to improve the lifetime of asphalt pavements.

ACS Style

Xing Liu; Shaopeng Wu; Ling Pang; Yue Xiao; Pan Pan. Fatigue Properties of Layered Double Hydroxides Modified Asphalt and Its Mixture. Advances in Materials Science and Engineering 2014, 2014, 1 -6.

AMA Style

Xing Liu, Shaopeng Wu, Ling Pang, Yue Xiao, Pan Pan. Fatigue Properties of Layered Double Hydroxides Modified Asphalt and Its Mixture. Advances in Materials Science and Engineering. 2014; 2014 ():1-6.

Chicago/Turabian Style

Xing Liu; Shaopeng Wu; Ling Pang; Yue Xiao; Pan Pan. 2014. "Fatigue Properties of Layered Double Hydroxides Modified Asphalt and Its Mixture." Advances in Materials Science and Engineering 2014, no. : 1-6.

Journal article
Published: 01 February 2014 in Key Engineering Materials
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The comprehensive survey on the thermal conductive cement concrete consists of graphite is obtained in this paper. The effects of graphite on mechanical properties and thermal properties were investigated to determine the optimum materials design. Additionally, scanning electron microscopy (SEM) was used to elucidate micrographs of the fracture graphite modified cement concrete. Result indicated that graphite could greatly improve the thermal conductivity properties of cement concrete, but degrade the related compressive strength simultaneously. When the graphite content is 15%, the increment of the thermal conductivity was 50% while the reduction of the compressive strength was almost 90%. Furthermore, SEM images illustrated that the reason for the degradation of mechanical strength maybe depend on the flake structure of graphite.

ACS Style

Shao Peng Wu; Peng Wang; Bo Li; Ling Pang; Fei Guo. Study on Mechanical and Thermal Properties of Graphite Modified Cement Concrete. Key Engineering Materials 2014, 599, 84 -88.

AMA Style

Shao Peng Wu, Peng Wang, Bo Li, Ling Pang, Fei Guo. Study on Mechanical and Thermal Properties of Graphite Modified Cement Concrete. Key Engineering Materials. 2014; 599 ():84-88.

Chicago/Turabian Style

Shao Peng Wu; Peng Wang; Bo Li; Ling Pang; Fei Guo. 2014. "Study on Mechanical and Thermal Properties of Graphite Modified Cement Concrete." Key Engineering Materials 599, no. : 84-88.

Journal article
Published: 01 February 2014 in Key Engineering Materials
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Three types of rejuvenator sealer materials were added into asphalt mortar after thin-film oven test (TFOT) and pressure aging vessel (PAV) aging processes. The performances of both aged mortar and rejuvenator treated mortar were evaluated by means of softening point, temperature sweep tests. Experimental results showed that all of rejuvenator sealer materials can significantly increase phase angle and decrease the softening point and complex modulus of TFOT aged asphalt, which means aged asphalt can be efficiently softened with the rejuvenator materials. However, the influence on PAV aged asphalt was slightly in the same concentration, which has a significantly direction for the pavement preservation.

ACS Style

Peng Wang; Pei Da Guo; Pan Pan; Ling Pang; Shao Peng Wu. Influence of Rejuvenator Materials on Rheological Properties of Asphalt Mortar under Different Aging Process. Key Engineering Materials 2014, 599, 168 -172.

AMA Style

Peng Wang, Pei Da Guo, Pan Pan, Ling Pang, Shao Peng Wu. Influence of Rejuvenator Materials on Rheological Properties of Asphalt Mortar under Different Aging Process. Key Engineering Materials. 2014; 599 ():168-172.

Chicago/Turabian Style

Peng Wang; Pei Da Guo; Pan Pan; Ling Pang; Shao Peng Wu. 2014. "Influence of Rejuvenator Materials on Rheological Properties of Asphalt Mortar under Different Aging Process." Key Engineering Materials 599, no. : 168-172.

Journal article
Published: 01 February 2014 in Key Engineering Materials
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The performance of asphalt concrete is strongly dependent on the rheological properties of asphalt binders. In this paper, PAN carbon fiber was employed to improve the conductivity of asphalt mixture. To better understand the performance of conductive asphalt mixture, the present study investigated the rheological characteristics of asphalt binders containing PAN carbon fiber. Additionally, scanning electron microscopy (SEM) was used to elucidate the microstructure and interface reaction between the asphalt and the PAN carbon fiber. Experimental results showed that carbon fibers in the asphalt can overlap each other and form a three-dimensional space structure, which could transfer and buffer the stress. Moreover, the addition of PAN carbon fiber increases the complex shear modulus of modified asphalt binders, which means higher resistance to the permanent deformation. Furthermore, the reduction of phase angle implied the increment of elastic portion in the visco-elastic of carbon modified asphalt binder.

ACS Style

Ling Pang; Peng Wang; Bo Li; Pan Pan; Shao Peng Wu. Investigation of Rheological Characteristics of Carbon Fiber Modified Asphalt Binder. Key Engineering Materials 2014, 599, 182 -186.

AMA Style

Ling Pang, Peng Wang, Bo Li, Pan Pan, Shao Peng Wu. Investigation of Rheological Characteristics of Carbon Fiber Modified Asphalt Binder. Key Engineering Materials. 2014; 599 ():182-186.

Chicago/Turabian Style

Ling Pang; Peng Wang; Bo Li; Pan Pan; Shao Peng Wu. 2014. "Investigation of Rheological Characteristics of Carbon Fiber Modified Asphalt Binder." Key Engineering Materials 599, no. : 182-186.