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Jie Ji
Beijing Collaborative Innovation Center for Energy Conservation & Emission Reduction and Sustainable Urban-Rural Development, Beijing 100044, China

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Review
Published: 20 August 2021 in Molecules
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Transforming waste biomass materials into bio-oils in order to partially substitute petroleum asphalt can reduce environmental pollution and fossil energy consumption and has economic benefits. The characteristics of bio-oils and their utilization as additives of asphalts are the focus of this review. First, physicochemical properties of various bio-oils are characterized. Then, conventional, rheological, and chemical properties of bio-oil modified asphalt binders are synthetically reviewed, as well as road performance of bio-oil modified asphalt mixtures. Finally, performance optimization is discussed for bio-asphalt binders and mixtures. This review indicates that bio-oils are highly complex materials that contain various compounds. Moreover, bio-oils are source-depending materials for which its properties vary with different sources. Most bio-oils have a favorable stimulus upon the low temperature performance of asphalt binders and mixtures but exhibit a negative impact on their high-temperature performance. Moreover, a large amount of oxygen element, oxygen-comprising functional groups, and light components in plant-based bio-oils result in higher sensitivity to ageing of bio-oil modified asphalts. In order to increase the performance of bio-asphalts, most research has been limited to adding additive agents to bio-asphalts; therefore, more reasonable optimization methods need to be proposed. Furthermore, upcoming exploration is also needed to identify reasonable evaluation indicators of bio-oils, modification mechanisms of bio-asphalts, and long-term performance tracking in field applications of bio-asphalts during pavement service life.

ACS Style

Ran Zhang; Zhanping You; Jie Ji; Qingwen Shi; Zhi Suo. A Review of Characteristics of Bio-Oils and Their Utilization as Additives of Asphalts. Molecules 2021, 26, 5049 .

AMA Style

Ran Zhang, Zhanping You, Jie Ji, Qingwen Shi, Zhi Suo. A Review of Characteristics of Bio-Oils and Their Utilization as Additives of Asphalts. Molecules. 2021; 26 (16):5049.

Chicago/Turabian Style

Ran Zhang; Zhanping You; Jie Ji; Qingwen Shi; Zhi Suo. 2021. "A Review of Characteristics of Bio-Oils and Their Utilization as Additives of Asphalts." Molecules 26, no. 16: 5049.

Journal article
Published: 31 May 2021 in Construction and Building Materials
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This study aims to investigate the effect of physical hardening on the low temperature performance of direct coal liquefaction residue (DCLR) modified asphalt. The extended bending beam rheometer (EBBR) method was used to evaluate the low temperature performance of DCLR modified asphalt with benzaldehyde, silane coupling agent and xylene compatibilizer. Meanwhile, the microstructure and morphology of DCLR modified asphalt before and after physical hardening were quantitatively characterized by atomic force microscope (AFM) and image processing software. In this study, the physical hardening was performed by placing the DCLR modified asphalt at low temperature conditions for a certain time. The test results show that as the conditioning temperature decreased and the conditioning period increased, both low temperature grade loss and hardening rate of asphalt increased, indicating that the low temperature performance deteriorated. Compared to the room-temperature conditions, the total number of “bee-structures” of DCLR modified asphalt under low temperature conditions were less, but the shape of a single “bee-structure” became larger and longer. The compatibilizers hindered the growth of “bee-structure”, which demonstrated that the compatibilizers could improve the low temperature performance of asphalt. The three compatibilizers had different effects on low temperature performance of DCLR modified asphalt. Among them, the silane coupling agent was the most effective, followed by benzaldehyde and xylene.

ACS Style

Jie Ji; Zhi Suo; Ran Zhang; Haolong Li; Bingye Han; Jiani Wang; Zhanping You. Effect of physical hardening on low temperature performance of DCLR modified asphalt. Construction and Building Materials 2021, 295, 123545 .

AMA Style

Jie Ji, Zhi Suo, Ran Zhang, Haolong Li, Bingye Han, Jiani Wang, Zhanping You. Effect of physical hardening on low temperature performance of DCLR modified asphalt. Construction and Building Materials. 2021; 295 ():123545.

Chicago/Turabian Style

Jie Ji; Zhi Suo; Ran Zhang; Haolong Li; Bingye Han; Jiani Wang; Zhanping You. 2021. "Effect of physical hardening on low temperature performance of DCLR modified asphalt." Construction and Building Materials 295, no. : 123545.

Highway engineering
Published: 12 March 2021 in KSCE Journal of Civil Engineering
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This study aims to investigate the effect of aggregate water absorption and loss characteristics on aggregate-asphalt adhesion. Lab tests were designed to analyze the water absorption and loss characteristics of limestone, basalt. and steel slag fine aggregates with different particle sizes under various temperatures and humidity conditions. Meanwhile, the low temperature nitrogen adsorption test, combined with the Brunauer, Emmett and Teller (BET) theory and Barret, Joyner and Halend (BJH) model, were used to calculate the specific surface area and pore size distribution of aggregate. Moreover, the asphalt-aggregate adhesion was evaluated by the net adsorption test. The results indicated that the change trends of water absorption and loss for the aggregates exhibited two stages. In the first stage, the amounts of water absorption and loss of aggregates were large and their change rates were high, while in the second stage, an opposite trend was observed. Humidity had the greatest influence on the water absorption and loss of aggregates, followed by aggregate particle size, contact time, temperature, and aggregate type. The smaller-sized aggregates had greater specific surface area, which led to a higher sensitivity to temperature and humidity changes. In comparison, the 0.3 mm-sized aggregate had a large capillary energy inside the pores, and it was the most sensitive to moisture. The steel slag aggregate had the strongest adhesion with asphalt, followed by the limestone aggregate, and the worst was basalt aggregate.

ACS Style

Jie Ji; Yang Dong; Ran Zhang; Zhi Suo; Chenwei Guo; Xu Yang; Zhanping You. Effect of Water Absorption and Loss Characteristics of Fine Aggregates on Aggregate-Asphalt Adhesion. KSCE Journal of Civil Engineering 2021, 25, 2020 -2035.

AMA Style

Jie Ji, Yang Dong, Ran Zhang, Zhi Suo, Chenwei Guo, Xu Yang, Zhanping You. Effect of Water Absorption and Loss Characteristics of Fine Aggregates on Aggregate-Asphalt Adhesion. KSCE Journal of Civil Engineering. 2021; 25 (6):2020-2035.

Chicago/Turabian Style

Jie Ji; Yang Dong; Ran Zhang; Zhi Suo; Chenwei Guo; Xu Yang; Zhanping You. 2021. "Effect of Water Absorption and Loss Characteristics of Fine Aggregates on Aggregate-Asphalt Adhesion." KSCE Journal of Civil Engineering 25, no. 6: 2020-2035.

Original research article
Published: 04 September 2020 in Frontiers in Materials
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The main objective of this research is to investigate the permanent deformation of asphalt mixtures containing direct coal liquefaction residue (DCLR) under various tire pressures and temperatures. Three types of asphalt mixtures, including control/DCLR/composite-DCLR modified asphalt mixture, were prepared by the Marshall design method. The rutting test was conducted under a tire pressure range of 0.7–1.0 MPa with a 0.1-MPa interval and at a temperature range of 55–70°C with a 5°C interval. Moreover, the dynamic stability and rutting depth of three asphalt mixtures were obtained to evaluate their resistance of permanent deformation. It was found that the rutting resistance of three asphalt mixtures declines with the increased tire pressures and temperatures. The asphalt mixture containing DCLR has a higher dynamic stability and lower rutting depth compared to the control asphalt mixture under the same conditions. Furthermore, the rutting resistance of composite-DCLR modified asphalt mixture is better than that of DCLR modified asphalt mixture. It indicates that the composite-DCLR is favorable for the improvement of rutting resistance of asphalt mixture. Moreover, the analysis of variance was applied, which analysis results showed that the rutting resistance of asphalt mixture is more sensitive to temperature than tire pressure. Based on the least-squares procedure, the relationship between dynamic stability and rutting depth was obtained, and the accuracy of the prediction is acceptable.

ACS Style

Suo Zhi; Ji Jie; Zhang Ran; Wang Zhe; Yao Hui; Jin Dongzhao. Effects of Tire Pressures and Test Temperatures on Permanent Deformation of Direct Coal Liquefaction Residue Mixture. Frontiers in Materials 2020, 7, 1 .

AMA Style

Suo Zhi, Ji Jie, Zhang Ran, Wang Zhe, Yao Hui, Jin Dongzhao. Effects of Tire Pressures and Test Temperatures on Permanent Deformation of Direct Coal Liquefaction Residue Mixture. Frontiers in Materials. 2020; 7 ():1.

Chicago/Turabian Style

Suo Zhi; Ji Jie; Zhang Ran; Wang Zhe; Yao Hui; Jin Dongzhao. 2020. "Effects of Tire Pressures and Test Temperatures on Permanent Deformation of Direct Coal Liquefaction Residue Mixture." Frontiers in Materials 7, no. : 1.

Journal article
Published: 22 May 2020 in Construction and Building Materials
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This research aims to investigate the rutting resistance of Direct Coal Liquefaction Residue (DCLR) modified asphalt mixture under variable loads over a wide temperature range. The SK-90 asphalt mixture and Styrene-Butadiene-Styrene (SBS) modified asphalt mixture were selected as comparisons. The rutting resistance of these three mixtures was studied by the rutting test with temperature of 30–70 °C under variable loads of 0.7–1.0 MPa. Meanwhile, the double factor variance analysis was performed to study the effect of temperature and load on the rutting resistance of mixtures, and the radar analysis was applied for comprehensive evaluation on the rutting resistance as well. The results demonstrate that the rutting resistance of mixtures presents a negative linear correlation with the load or the temperature. Comparing load, the temperature shows a more significant influence on the resistance to rutting of mixtures. Under the coupling effect of temperature and load, the DCLR modified asphalt mixture had higher values of Va, Vb, WL and WT than the other two mixtures. Therefore, among these three mixtures, the DCLR modified asphalt mixture owns the best stable rutting resistance, which gives the least sensitivity and dependence on the temperature and load.

ACS Style

Ji Jie; Wang Zhe; Zhang Ran; Wei Jianming; Suo Zhi; You Zhanping; Hu Junpeng. Rutting resistance of direct coal liquefaction residue (DCLR) modified asphalt mixture under variable loads over a wide temperature range. Construction and Building Materials 2020, 257, 119489 .

AMA Style

Ji Jie, Wang Zhe, Zhang Ran, Wei Jianming, Suo Zhi, You Zhanping, Hu Junpeng. Rutting resistance of direct coal liquefaction residue (DCLR) modified asphalt mixture under variable loads over a wide temperature range. Construction and Building Materials. 2020; 257 ():119489.

Chicago/Turabian Style

Ji Jie; Wang Zhe; Zhang Ran; Wei Jianming; Suo Zhi; You Zhanping; Hu Junpeng. 2020. "Rutting resistance of direct coal liquefaction residue (DCLR) modified asphalt mixture under variable loads over a wide temperature range." Construction and Building Materials 257, no. : 119489.

Journal article
Published: 15 November 2018 in Journal of Testing and Evaluation
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The objective of this research is to study the properties of waterborne epoxy–modified emulsified asphalt binder (WEMEAB). The WEMEAB was prepared with a method of preemulsification and modification. The optimum asphalt-water ratio (ratio of base asphalt binder to emulsifier), emulsifier content, and waterborne epoxy content were determined through an orthogonal test with three factors and three levels. Based on the penetration system, the high- and low-temperature properties and storage stability of WEMEAB were evaluated. The distribution of waterborne epoxy in the modified emulsified asphalt binder and the microstructure of WEMEAB were observed through the Fluorescence Optical Microscopy (FOM) and Atomic Force Microscopy (AFM) tests. The test results indicated that the high- and low-temperature properties of WEMEAB were noticeably improved and that the waterborne epoxy was distributed uniformly in the modified emulsified asphalt binder with an asphalt-water ratio of 65:35, 4 % waterborne epoxy and 1.4 % emulsifier. The FOM and AFM images showed that cross-linking and interpenetration network structure and “bee-like” structures had formed on the surface of the WEMEAB.

ACS Style

Jie Ji; Hui Yao; Wenhua Zheng; Zhi Suo; Ying Xu; Song Han; Shifa Xu; Zhanping You. Preparation and Properties of Waterborne Epoxy–Modified Emulsified Asphalt Binder (WEMEAB). Journal of Testing and Evaluation 2018, 48, 1 .

AMA Style

Jie Ji, Hui Yao, Wenhua Zheng, Zhi Suo, Ying Xu, Song Han, Shifa Xu, Zhanping You. Preparation and Properties of Waterborne Epoxy–Modified Emulsified Asphalt Binder (WEMEAB). Journal of Testing and Evaluation. 2018; 48 (4):1.

Chicago/Turabian Style

Jie Ji; Hui Yao; Wenhua Zheng; Zhi Suo; Ying Xu; Song Han; Shifa Xu; Zhanping You. 2018. "Preparation and Properties of Waterborne Epoxy–Modified Emulsified Asphalt Binder (WEMEAB)." Journal of Testing and Evaluation 48, no. 4: 1.

Journal article
Published: 01 May 2018 in Advances in Civil Engineering Materials
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Accurate determination of pavement service life based on time-series pavement condition data is crucial to achieve many pavement maintenance and management objectives. Although pavement condition monitoring frequency is one of the most important influencing factors used to estimate pavement service life, previous studies and applications are mainly focused on different monitoring frequencies with equal time intervals. No studies investigating the effect of pavement monitoring frequency with unequal time intervals for the determination of pavement service life have been conducted. In this study, the effects of estimating pavement service life using two pavement condition monitoring methods (equal versus unequal time intervals) under the same monitoring frequency were investigated. Two potential influencing factors, i.e., estimation methods (trend interpolation and extrapolation) and R2 of the fitted performance curve, were considered in this study. The analysis results indicate that, compared to the equal interval monitoring method at the same monitoring frequency, especially for pavement sections using the trend extrapolation method, the estimated accuracy of pavement service life was significantly improved using the unequal interval monitoring method. According to the analysis results, an optimal pavement condition monitoring method was developed and validated based on unequal interval monitoring using actual pavement condition data of I-16 in Georgia.

ACS Style

Ying Xu; Jianbing He; Jie Ji; Shifa Xu. Effect of Pavement Condition Monitoring Frequency with Unequal Interval on Determining Pavement Service Life. Advances in Civil Engineering Materials 2018, 7, 261 -271.

AMA Style

Ying Xu, Jianbing He, Jie Ji, Shifa Xu. Effect of Pavement Condition Monitoring Frequency with Unequal Interval on Determining Pavement Service Life. Advances in Civil Engineering Materials. 2018; 7 (2):261-271.

Chicago/Turabian Style

Ying Xu; Jianbing He; Jie Ji; Shifa Xu. 2018. "Effect of Pavement Condition Monitoring Frequency with Unequal Interval on Determining Pavement Service Life." Advances in Civil Engineering Materials 7, no. 2: 261-271.

Conference paper
Published: 06 February 2018 in Transportation Research Congress 2016
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To analyze the effect of moist aggregate and multiple freeze-thaw cycles on moisture susceptibility of warm mix asphalt (WMA) containing organic wax additive (Sasobit), different target moisture contents (1%, 2%, 3%) of aggregates (limestone and basalt) are simulated using the bucket-mixer heating method in lab. The moisture susceptibility of WMA that composed of 3% Sasobit modified asphalt binder (by weight of SK-90 asphalt binder) and different types of dry/moist aggregates in one/two freeze-thaw cycles are test using the modified Lottman test. The test results show the moisture susceptibility of WMA linearly decreases significantly with the increase of moisture content and freeze-thaw cycle number. The moisture susceptibility of WMA made with moist aggregate cannot meet the current specification in China. However, under identical conditions (same moisture content and freeze-thaw cycle number), the moisture susceptibility of WMA made with basalt is better than that of WMA made with limestone.

ACS Style

Jie Ji; Peng Zhai; Zhi Suo; Ying Xu; Shi-Fa Xu. Analysis on Moisture Susceptibility of Warm Mix Asphalt Affected by Moist Aggregate and Multiple Freeze-Thaw Cycles. Transportation Research Congress 2016 2018, 1 .

AMA Style

Jie Ji, Peng Zhai, Zhi Suo, Ying Xu, Shi-Fa Xu. Analysis on Moisture Susceptibility of Warm Mix Asphalt Affected by Moist Aggregate and Multiple Freeze-Thaw Cycles. Transportation Research Congress 2016. 2018; ():1.

Chicago/Turabian Style

Jie Ji; Peng Zhai; Zhi Suo; Ying Xu; Shi-Fa Xu. 2018. "Analysis on Moisture Susceptibility of Warm Mix Asphalt Affected by Moist Aggregate and Multiple Freeze-Thaw Cycles." Transportation Research Congress 2016 , no. : 1.

Journal article
Published: 10 November 2017 in Applied Sciences
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This paper aims to study the preparation and viscoelastic properties of asphalt binder modified by tetrahydrofuran soluble fraction (THFS) extracted from direct coal liquefaction residue. The modified asphalt binders, which blended with SK-90 (control asphalt binder) and 4%, 6%, 8% and 10% THFS (by weight of SK-90), were fabricated. The preparation process for asphalt binder was optimized in terms of the orthogonal array test strategy and gray correlation analysis results. The properties of asphalt binder were measured by applying Penetration performance grade and Superpave performance grade specifications. In addition, the temperature step and frequency sweep test in Dynamic Shear Rheometer were conducted to predict the rheological behavior, temperature and frequency susceptibility of asphalt binder. The test results suggested the optimal preparation process, such as 150 °C shearing temperature, 45 min shearing time and 4000 rpm shearing rate. Subsequently, the addition of THFS was beneficial in increasing the high-temperature properties but decreased the low-temperature properties and resistance to fatigue. The content analysis of THFS showed the percentage of 4~6% achieved a balance in the high-and-low temperature properties of asphalt binder. The asphalt binder with higher THFS content exhibited higher resistance to rutting and less sensitivity to frequency and temperature.

ACS Style

Jie Ji; Hui Yao; Wenhua Zheng; Zhi Suo; Yuefeng Shi; Ying Xu; Hao Wu; Zhanping You. Preparation and Properties of Asphalt Binders Modified by THFS Extracted From Direct Coal Liquefaction Residue. Applied Sciences 2017, 7, 1155 .

AMA Style

Jie Ji, Hui Yao, Wenhua Zheng, Zhi Suo, Yuefeng Shi, Ying Xu, Hao Wu, Zhanping You. Preparation and Properties of Asphalt Binders Modified by THFS Extracted From Direct Coal Liquefaction Residue. Applied Sciences. 2017; 7 (11):1155.

Chicago/Turabian Style

Jie Ji; Hui Yao; Wenhua Zheng; Zhi Suo; Yuefeng Shi; Ying Xu; Hao Wu; Zhanping You. 2017. "Preparation and Properties of Asphalt Binders Modified by THFS Extracted From Direct Coal Liquefaction Residue." Applied Sciences 7, no. 11: 1155.

Journal article
Published: 20 September 2017 in International Journal of Pavement Research and Technology
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To study the influence of DCLR (direct coal liquefaction residue) on mechanical properties of flexible pavement, the DCLR/compound DCLR modified asphalt mixture was prepared. The 15 °C and 20 °C compression resilience moduli of DCLR/compound DCLR modified asphalt mixtures were measured using the uniaxial compression test. The influences of DCLR/compound DCLR modified asphalt mixture on deflection, upper layer thickness, and bending flexural tensile stress of layer bottom were analyzed using Bisar3.0 and HPDS software. The test results show the DCLR/compound DCLR modified asphalt has higher compression resilience modulus. Due to higher resilience moduli of DCLR/compound DCLR modified asphalt mixture, they can be used as bottom layer in pavement. Under the identical loadings, the upper layer thickness can be reduced by adding DCLR and compound DCLR. If the upper layer thickness is same, the bending flexural tensile stress of layer bottom and deflection will decrease significantly.

ACS Style

Jie Ji; Di Wang; Zhi Suo; Ying Xu; Shi-Fa Xu. Study on direct coal liquefaction residue influence on mechanical properties of flexible pavement. International Journal of Pavement Research and Technology 2017, 11, 355 -362.

AMA Style

Jie Ji, Di Wang, Zhi Suo, Ying Xu, Shi-Fa Xu. Study on direct coal liquefaction residue influence on mechanical properties of flexible pavement. International Journal of Pavement Research and Technology. 2017; 11 (4):355-362.

Chicago/Turabian Style

Jie Ji; Di Wang; Zhi Suo; Ying Xu; Shi-Fa Xu. 2017. "Study on direct coal liquefaction residue influence on mechanical properties of flexible pavement." International Journal of Pavement Research and Technology 11, no. 4: 355-362.

Journal article
Published: 01 March 2017 in Journal of Materials in Civil Engineering
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Traditional rejuvenators normally have a great deal of heavy fuel oils to supply the light oil component of asphalt binders, which decreases throughout a long-term aging process. However, heavy fuel oils can easily volatilize at a high recycling temperature (above 180°C), and this leads to a limited portion of reclaimed asphalt pavement (RAP) materials utilized in the recycled asphalt mixture (with a recycling rate less than 30%). Vegetable oils are rich in unsaturated fatty acids, which are similar to the light oil components, and have a better temperature resistance. Therefore, there is potential that vegetable oils can be utilized to recover the aged asphalt binder based on the asphalt rejuvenating mechanism. In this study, two rejuvenators with waste cooking vegetable oils (corn oil and soybean oil) to replace heavy oils and a commercial rejuvenator were used to recover the aged asphalt (extracted from RAP materials) with different ratios (by weight of asphalt) of 2, 4, 6, 8, and 10%. Dynamic shear rheometer (DSR) and rotational viscosity (RV) tests were used to evaluate the physical properties of the recovered asphalt binder. The low-temperature performance of the recovered asphalt binder was also evaluated by the bending beam rheometer (BBR) test. The laboratory tests and statistical analysis of variance (ANOVA) results show that the vegetable oil rejuvenators can effectively decrease the viscosity and stiffness of aged asphalt binder, which is beneficial for both fatigue and low-temperature cracking resistance. Furthermore, the rejuvenator can lower the viscosity and stiffness of the aged asphalt binder with a larger amount of vegetable oil. Overall, the vegetable oil content (6% to 8%) in the rejuvenator is proposed for recovering the aged asphalt binder in consideration of the rutting resistance under high temperatures.

ACS Style

Jie Ji; Hui Yao; Zhi Suo; Zhanping You; Haoxin Li; Shifa Xu; Lijun Sun. Effectiveness of Vegetable Oils as Rejuvenators for Aged Asphalt Binders. Journal of Materials in Civil Engineering 2017, 29, 1 .

AMA Style

Jie Ji, Hui Yao, Zhi Suo, Zhanping You, Haoxin Li, Shifa Xu, Lijun Sun. Effectiveness of Vegetable Oils as Rejuvenators for Aged Asphalt Binders. Journal of Materials in Civil Engineering. 2017; 29 (3):1.

Chicago/Turabian Style

Jie Ji; Hui Yao; Zhi Suo; Zhanping You; Haoxin Li; Shifa Xu; Lijun Sun. 2017. "Effectiveness of Vegetable Oils as Rejuvenators for Aged Asphalt Binders." Journal of Materials in Civil Engineering 29, no. 3: 1.

Research article
Published: 21 February 2017 in Advances in Materials Science and Engineering
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The objectives of this paper are to use Direct Coal Liquefaction Residue (DLCR) to modify the asphalt binders and mixtures and to evaluate the performance of modified asphalt mixtures. The dynamic modulus and phase angle of DCLR and DCLR-composite modified asphalt mixture were analyzed, and the viscoelastic properties of these modified asphalt mixtures were compared to the base asphalt binder SK-90 and Styrene-Butadiene-Styrene (SBS) modified asphalt mixtures. The master curves of the asphalt mixtures were shown, and dynamic and viscoelastic behaviors of asphalt mixtures were described using the Christensen-Anderson-Marasteanu (CAM) model. The test results show that the dynamic moduli of DCLR and DCLR-composite asphalt mixtures are higher than those of the SK-90 and SBS modified asphalt mixtures. Based on the viscoelastic parameters of CAM models of the asphalt mixtures, the high- and low-temperature performance of DLCR and DCLR-composite modified asphalt mixtures are obviously better than the SK-90 and SBS modified asphalt mixtures. In addition, the DCLR and DCLR-composite modified asphalt mixtures are more insensitive to the frequency compared to SK-90 and SBS modified asphalt mixtures.

ACS Style

Jie Ji; Hui Yao; Di Wang; Zhi Suo; Luhou Liu; Zhanping You. Properties of Direct Coal Liquefaction Residue Modified Asphalt Mixture. Advances in Materials Science and Engineering 2017, 2017, 1 -11.

AMA Style

Jie Ji, Hui Yao, Di Wang, Zhi Suo, Luhou Liu, Zhanping You. Properties of Direct Coal Liquefaction Residue Modified Asphalt Mixture. Advances in Materials Science and Engineering. 2017; 2017 ():1-11.

Chicago/Turabian Style

Jie Ji; Hui Yao; Di Wang; Zhi Suo; Luhou Liu; Zhanping You. 2017. "Properties of Direct Coal Liquefaction Residue Modified Asphalt Mixture." Advances in Materials Science and Engineering 2017, no. : 1-11.

Journal article
Published: 19 February 2017 in DEStech Transactions on Engineering and Technology Research
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Snow/ice Self-melting pavement is a new kind of pavement with asphalt mixtures containing anti-freeze additives. In this research, three kinds of anti-freeze additives (IB-A, IB-B and IB-C) were applied. IB-A is a chloride salt that contains four substances and IB-B is a sulfonate including two substances. IB-C is a kind of Phase change material. The performance of asphalt mixtures were evaluated by using a series of laboratory tests, such as high temperature resistance, low temperature crack resistance and moisture resistance. Furthermore, based on the surface contact mechanism relationship between ice and pavement surface, a test instrument was developed and a new method was proposed to evaluate snow/ice melting efficiency. The test results show that the asphalt mixture with IB-A has the highest snow/ice melting efficiency and IB-C has no difference with the control group. To balance the performance and snow/ice melting efficiency, the optimum anti-freeze filler content were determined and proposed to apply in the Zhangcheng highway pavement de-icing engineering.

ACS Style

Zhi Suo; Feng Guo; Jie Ji; Shanshan Jin; Ao Zhang. Comparison of the Effect of Different Anti-freeze Additives on the De-Icing Asphalt Mixtures. DEStech Transactions on Engineering and Technology Research 2017, 1 .

AMA Style

Zhi Suo, Feng Guo, Jie Ji, Shanshan Jin, Ao Zhang. Comparison of the Effect of Different Anti-freeze Additives on the De-Icing Asphalt Mixtures. DEStech Transactions on Engineering and Technology Research. 2017; (ictim):1.

Chicago/Turabian Style

Zhi Suo; Feng Guo; Jie Ji; Shanshan Jin; Ao Zhang. 2017. "Comparison of the Effect of Different Anti-freeze Additives on the De-Icing Asphalt Mixtures." DEStech Transactions on Engineering and Technology Research , no. ictim: 1.

Journal article
Published: 09 February 2017 in Applied Sciences
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The influence of organic additives (Sasobit and RH) and water on the adhesion of the asphalt-aggregate interface was studied according to the surface free energy theory. Two asphalt binders (SK-70 and SK-90), and two aggregate types (limestone and basalt) were used in this study. The sessile drop method was employed to test surface free energy components of asphalt, organic additives and aggregates. The adhesion models of the asphalt-aggregate interface in dry and wet conditions were established, and the adhesion work was calculated subsequently. The energy ratios were built to evaluate the effect of organic additives and water on the adhesiveness of the asphalt-aggregate interface. The results indicate that the addition of organic additives can enhance the adhesion of the asphalt-aggregate interface in dry conditions, because organic additives reduced the surface free energy of asphalt. However, the organic additives have hydrophobic characteristics and are sensitive to water. As a result, the adhesiveness of the asphalt-aggregate interface of the asphalt containing organic additives in wet conditions sharply decreased due to water damage to asphalt and organic additives. Furthermore, the compatibility of asphalt, aggregate with organic additive was noted and discussed.

ACS Style

Jie Ji; Hui Yao; Luhou Liu; Zhi Suo; Peng Zhai; Xu Yang; Zhanping You. Adhesion Evaluation of Asphalt-Aggregate Interface Using Surface Free Energy Method. Applied Sciences 2017, 7, 156 .

AMA Style

Jie Ji, Hui Yao, Luhou Liu, Zhi Suo, Peng Zhai, Xu Yang, Zhanping You. Adhesion Evaluation of Asphalt-Aggregate Interface Using Surface Free Energy Method. Applied Sciences. 2017; 7 (2):156.

Chicago/Turabian Style

Jie Ji; Hui Yao; Luhou Liu; Zhi Suo; Peng Zhai; Xu Yang; Zhanping You. 2017. "Adhesion Evaluation of Asphalt-Aggregate Interface Using Surface Free Energy Method." Applied Sciences 7, no. 2: 156.

Conference paper
Published: 19 October 2015 in New Frontiers in Road and Airport Engineering
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To analyze RAP, mixing mode and additives impacted on fatigue characteristics of recycled SMA asphalt mixtures, the hot and warm recycled SMA mixtures with 0%, 20%, and 30% RAP are designed. The warm recycled mixtures are prepared with adding 3% Sasobit into the hot recycled SMA mixture using dry-processing and wet-processing methods. Four-point bending fatigue test is conducted on the recycled mixtures, and the dissipated energy theory is employed to analyze fatigue characteristics of the recycled mixtures. It shows that: (1) the relationship between fatigue life and cumulative dissipated energy of the recycled mixtures does not change with the variation of RAP content and mixing mode. There is a good linear relationship between fatigue life and cumulative dissipated energy of the recycled mixtures, which can be represented by a unique relation equation. (2) When RAP content is lower than 20%, fatigue characteristics of the recycled mixtures has a little change, while when RAP content is higher than 20%, fatigue characteristics of the recycled mixtures experiences a sharp decline. (3) Sasobit additive has an adverse impact on fatigue characteristics of the mixtures without RAP.

ACS Style

Jie Ji; Zhi Suo; Song Yang; Ying Xu; Shifa Xu. Application of the Dissipated Energy Theory to Estimate the Fatigue Characteristics of Hot and Warm Recycled SMA Mixtures. New Frontiers in Road and Airport Engineering 2015, 1 .

AMA Style

Jie Ji, Zhi Suo, Song Yang, Ying Xu, Shifa Xu. Application of the Dissipated Energy Theory to Estimate the Fatigue Characteristics of Hot and Warm Recycled SMA Mixtures. New Frontiers in Road and Airport Engineering. 2015; ():1.

Chicago/Turabian Style

Jie Ji; Zhi Suo; Song Yang; Ying Xu; Shifa Xu. 2015. "Application of the Dissipated Energy Theory to Estimate the Fatigue Characteristics of Hot and Warm Recycled SMA Mixtures." New Frontiers in Road and Airport Engineering , no. : 1.

Conference paper
Published: 05 May 2014 in Challenges and Advances in Sustainable Transportation Systems
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ACS Style

Ying Xu; Shifa Xu; Jie Ji. Measurement Method of Blending Status between Virgin and Aged Binder in Recycled Asphalt Mixtures—A Literature Review. Challenges and Advances in Sustainable Transportation Systems 2014, 1 .

AMA Style

Ying Xu, Shifa Xu, Jie Ji. Measurement Method of Blending Status between Virgin and Aged Binder in Recycled Asphalt Mixtures—A Literature Review. Challenges and Advances in Sustainable Transportation Systems. 2014; ():1.

Chicago/Turabian Style

Ying Xu; Shifa Xu; Jie Ji. 2014. "Measurement Method of Blending Status between Virgin and Aged Binder in Recycled Asphalt Mixtures—A Literature Review." Challenges and Advances in Sustainable Transportation Systems , no. : 1.

Proceedings article
Published: 05 May 2014 in Challenges and Advances in Sustainable Transportation Systems
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[This draft version of “Study on the Performances of Direct Coal Liquefaction Residue Modified Mixture Asphalt” (DOI 10.1061/9780784413364.039) was erroneously included in the published proceedings.] The properties of the two different blends composed of direct coal liquefaction residue (DCLR) and a binder using two processing methods are studied in this paper. One processing method is to blend powdered DCLR and a binder, and the other is to blend molten DCLR and a binder. The optimum adding content of DCLR is determined using a PG system. Furfural extract oil is used to improve the low-temperature properties of the blends. The performance of DCLR-modified mixture asphalt with the two different blends is also studied in this paper. At first, the DCLR-13 was designed using the Marshall method. Second, the rutting test, freeze-thaw splitting test, and low-temperature bending test was conducted on the DCLR-13. Finally, the performance of the DCLR-13 with the two different blends were evaluated and compared. Results indicate that the performance of DCLR-modified mixture asphalt satisfies the specifications, and the processing method has an influence on the performance of DCLR-modified mixture asphalt.

ACS Style

Yong-Shang Zhao; Jie Ji. Study on the Performance of Direct Coal Liquefaction Residue Modified Mixture Asphalt. Challenges and Advances in Sustainable Transportation Systems 2014, 352 -357.

AMA Style

Yong-Shang Zhao, Jie Ji. Study on the Performance of Direct Coal Liquefaction Residue Modified Mixture Asphalt. Challenges and Advances in Sustainable Transportation Systems. 2014; ():352-357.

Chicago/Turabian Style

Yong-Shang Zhao; Jie Ji. 2014. "Study on the Performance of Direct Coal Liquefaction Residue Modified Mixture Asphalt." Challenges and Advances in Sustainable Transportation Systems , no. : 352-357.

Conference paper
Published: 05 May 2014 in Challenges and Advances in Sustainable Transportation Systems
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The properties of two different asphalt mixtures blended with direct coal liquefaction residue (DCLR) and binder using two processing methods were studied in this paper. One processing method is to blend powdered DCLR and binder, and the other processing method is to blend molten DCLR and binder. The optimum content of DCLR was determined using the PG system and furfural extract oil was used to improve the low-temperature properties of the blends. The performance of DCLR modified asphalt mixture with the two different blends was also studied in this paper. At first, the DCLR-13 was designed using the Marshall method. Then, the rutting test, the freeze-thaw splitting test, and the low-temperature bending test were conducted on the DCLR-13. Finally, the performances of DCLR-13 with the two different blends were evaluated and compared. The test results indicated that the performance of DCLR modified asphalt mixtures satisfied the specification. The processing method has an influence on the performance of DCLR modified asphalt mixtures.

ACS Style

Yongshang Zhao; Jie Ji. Study on the Performances of Direct Coal Liquefaction Residue Modified Mixture Asphalt. Challenges and Advances in Sustainable Transportation Systems 2014, 1 .

AMA Style

Yongshang Zhao, Jie Ji. Study on the Performances of Direct Coal Liquefaction Residue Modified Mixture Asphalt. Challenges and Advances in Sustainable Transportation Systems. 2014; ():1.

Chicago/Turabian Style

Yongshang Zhao; Jie Ji. 2014. "Study on the Performances of Direct Coal Liquefaction Residue Modified Mixture Asphalt." Challenges and Advances in Sustainable Transportation Systems , no. : 1.

Journal article
Published: 20 November 2013 in Procedia - Social and Behavioral Sciences
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Warm mix asphalt (WMA) has been popularly used in all over the world to reduce both energy consumptions and carbon emissions in asphalt paving industry. The long-term aging characterization of binders containing WMA additive was evaluated in this research. The penetration grade 60/80 and SBS modified binders were selected as virgin materials. The Sasobit, WMA additive, was blended into virgin materials with 2%, 3%, 4% and 5% by weight of binders. The warm modified binders were aged by means of the rolling thin film oven (RTFO) and pressure aging vessel (PAV). A serial of laboratory studies, such as Penetration, four-constituents, rotational viscometer (RV), dynamic shear rheometer (DSR) and bending beam rheometer (BBR), were conducted on both virgin binders and long-term aging binders. The aged rates of binders were calculated and compared. The results showed that the virgin binders played an important role in the determination of warm modified binder's properties and colloid-structures. However, compared to the aging regulation of virgin and warm modified binders, Sasobit had no or marginally positive influence on the long-term aging characterization (affected by virgin binder type) of warm modified binders.

ACS Style

Jie Ji; Zhi Suo; Ying Xu. Laboratory Evaluation on the Long-term Aging Characterization of Warm Modified Binders. Procedia - Social and Behavioral Sciences 2013, 96, 1640 -1647.

AMA Style

Jie Ji, Zhi Suo, Ying Xu. Laboratory Evaluation on the Long-term Aging Characterization of Warm Modified Binders. Procedia - Social and Behavioral Sciences. 2013; 96 ():1640-1647.

Chicago/Turabian Style

Jie Ji; Zhi Suo; Ying Xu. 2013. "Laboratory Evaluation on the Long-term Aging Characterization of Warm Modified Binders." Procedia - Social and Behavioral Sciences 96, no. : 1640-1647.

Proceedings article
Published: 26 July 2011 in ICCTP 2011
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This paper reports the properties of the Pen 60/80 asphalt and SBS modified asphalt in two aging and recycling cycles and analyzes their anti-aging capacities. During the 1st aging and recycling cycle, the Rolling Thin Film Oven Test is carried out on the two asphalts. The residual asphalts are directly put into the 85°C oven for aging 24, 48, 72 and 120 hours to simulate different long-term aging. Based on the aged levels of the asphalts, the 1st aged asphalts are recycled by adding rejuvenator to recover the original level. The 1st recycled asphalts then underwent the 2nd aging and recycling cycle, which is the same process as the 1st cycle. In each cycle, the properties, aging indexes, and anti-aging capacities of the two asphalts are tested and estimated. It is found that the properties of the two asphalts decline as the aging and recycling cycle increases. The critical aging times H, of the two asphalts can be obtained and used to determine their anti-aging capacities. The two asphalts' anti-aging capacities are related to not only the cycle time but also the asphalt type.

ACS Style

Xiaohui Luo; Jie Ji. Comparison on the Anti-Aging Capacity of Asphalt in Two Aging and Recycling Cycles. ICCTP 2011 2011, 1 .

AMA Style

Xiaohui Luo, Jie Ji. Comparison on the Anti-Aging Capacity of Asphalt in Two Aging and Recycling Cycles. ICCTP 2011. 2011; ():1.

Chicago/Turabian Style

Xiaohui Luo; Jie Ji. 2011. "Comparison on the Anti-Aging Capacity of Asphalt in Two Aging and Recycling Cycles." ICCTP 2011 , no. : 1.