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Xuancang Wang
School of Highway, Chang'an University, Xi'an 710064, China

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Journal article
Published: 07 August 2021 in Construction and Building Materials
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As one of the most popular preventive maintenance of road surface, the ultra-thin overlay with good durability and surface function could provide better conditions for the safe and smooth running of vehicles. The objective of this study is to prepare an ultra-thin overlay with easy compaction and high-durability (ECHD) and to evaluate its durability. First, the optimal dosage of the easy compaction modifier was determined based on the grey theory. Then, matrix asphalt and SBS-modified asphalt mixtures were used as control groups. Through an experimental design, the ease of compaction, fatigue durability, ageing resistance, surface function durability, and interlayer durability of the three asphalt mixtures were compared. Finally, using the test road, a field effect evaluation of the durability of the ECHD ultra-thin overlay was performed, and a durability evaluation system for ultra-thin overlays was established. The results showed that the optimal content of the modifier was 6%. The ECHD asphalt mixture exhibited the smallest Compaction energy index (CEI), largest compaction rate (K), and easiest compaction. The splitting strength ratio was used as the ageing coefficient to evaluate the ageing performance. Compared with the matrix asphalt and SBS-modified asphalt mixture, the ECHD asphalt mixture exhibited better ageing durability and fatigue durability. Moreover, after 30,000 wear times, the mass loss rate of ECHD ultra-thin overlay was 0.4%, the texture depth and pendulum value decreased by 25% and 16%, and the shear strength and pull-off strength decreased by 6% and 20% respectively, which showed that it had the best performance in wear-resistance, skid-resistance, water-impermeable and interlayer durability. In addition, the durability effect of the ECHD ultra-thin overlay test road was evaluated and a durability evaluation system of the ECHD ultra-thin overlay was proposed, which can act as a reference for the durability evaluation of the same type of overlays.

ACS Style

Longting Ding; Xuancang Wang; Kaixing Zhang; Mengyuan Zhang; Jia Yang; Zhao Chen. Durability evaluation of easy compaction and high-durability ultra-thin overlay. Construction and Building Materials 2021, 302, 124407 .

AMA Style

Longting Ding, Xuancang Wang, Kaixing Zhang, Mengyuan Zhang, Jia Yang, Zhao Chen. Durability evaluation of easy compaction and high-durability ultra-thin overlay. Construction and Building Materials. 2021; 302 ():124407.

Chicago/Turabian Style

Longting Ding; Xuancang Wang; Kaixing Zhang; Mengyuan Zhang; Jia Yang; Zhao Chen. 2021. "Durability evaluation of easy compaction and high-durability ultra-thin overlay." Construction and Building Materials 302, no. : 124407.

Journal article
Published: 21 April 2021 in Construction and Building Materials
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The aging of asphalt seriously affects the pavement performance of asphalt mixtures. In this study, we investigated the changes in virgin and aged asphalt during the regeneration process of aging asphalt using atomic force microscopy (AFM), Fourier transform infrared (FTIR) spectrometer, and dynamic shear rheometry (DSR). Dynamic modulus tests were carried out for asphalt mixtures containing 30% and 50% reclaimed asphalt pavement. Comparatively DSR tests were performed to determine the complex shear modulus for asphalt binder blends containing 30.6% and 51% aged asphalt. Based on the Hirsch model, the predicted and measured values of the dynamic modulus were compared to obtain a macroscopic evaluation of the degree of virgin and aged asphalt fusion. The results show that the virgin and aged asphalt are fused with high uniformity. From AFM scans, with increase in virgin asphalt content, the size of the bee-like structure decreased and the number increased. This was reflected in roughness indexes (Rq, Ra, Pbee-like, and Rmax) exhibiting gradually decrease, tending more to the microstructure of virgin asphalt with increasing virgin asphalt content. FTIR results showed that the carbonyl index and sulfoxide index decreased as the virgin asphalt content increased, which was consistent with the AFM test results. With addition of an optimal amount of regenerant the microstructure and high-temperature rheological properties of aged asphalt were positively altered. The improvement in the microstructure and rheological properties of rejuvenated aged asphalt was found to be similar to that of blends altered with 49% of virgin asphalt. With the increase in the content of virgin asphalt, the complex shear modulus of the asphalt G*, the rutting resistance of asphalt G*/sinδ was found to decrease as δ increased. The comparison between the predicted and measured dynamic modulus value confirms the successful fusion of the virgin and aged asphalt from a macro perspective. The macroscopic and microscopic analysis results of the change law of virgin and aged asphalt fusion are consistent.

ACS Style

Longting Ding; Xuancang Wang; Mengyuan Zhang; Zhao Chen; Jiaqi Meng; Xiansheng Shao. Morphology and properties changes of virgin and aged asphalt after fusion. Construction and Building Materials 2021, 291, 123284 .

AMA Style

Longting Ding, Xuancang Wang, Mengyuan Zhang, Zhao Chen, Jiaqi Meng, Xiansheng Shao. Morphology and properties changes of virgin and aged asphalt after fusion. Construction and Building Materials. 2021; 291 ():123284.

Chicago/Turabian Style

Longting Ding; Xuancang Wang; Mengyuan Zhang; Zhao Chen; Jiaqi Meng; Xiansheng Shao. 2021. "Morphology and properties changes of virgin and aged asphalt after fusion." Construction and Building Materials 291, no. : 123284.

Journal article
Published: 17 April 2021 in Materials
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The sustainability of resources is presently a major global concern. Sustainable construction materials can be produced by applying biological waste to engineering. Eggshells, as biological waste, are usually dumped in landfills or discarded. This causes many environmental problems including malodor, noise pollution, and serious waste of resources. To solve these problems, this study combined eggshell waste with bitumen materials for bio-roads construction. This paper investigated the impact of biological waste eggshell powder on the high- and low-temperature characteristics of bitumen materials. Scanning electron microscopy (SEM) revealed the microstructure of eggshell powder. The interaction between eggshell powder and asphalt was analyzed using Fourier transform infrared spectroscopy (FT-IR). The high- and low-temperature characteristics were investigated using conventional performance tests, and dynamic shear rheometer (DSR) and bending beam rheometer (BBR) experiments. These results indicate that eggshell powder (1) has a rough and porous microstructure; (2) has no apparent chemical reaction with asphalt; and (3) improves the consistency, hardness, and high-temperature characteristics. However, it reduces the plastic deformation capacity of asphalt, and the low-temperature crack resistance of asphalt cannot be improved. The research demonstrated that the application of eggshell powder in asphalt is feasible and has long-term resource and environmental advantages.

ACS Style

Xuancang Wang; Guanyu Ji; Yi Zhang; Yuchen Guo; Jing Zhao. Research on High- and Low-Temperature Characteristics of Bitumen Blended with Waste Eggshell Powder. Materials 2021, 14, 2020 .

AMA Style

Xuancang Wang, Guanyu Ji, Yi Zhang, Yuchen Guo, Jing Zhao. Research on High- and Low-Temperature Characteristics of Bitumen Blended with Waste Eggshell Powder. Materials. 2021; 14 (8):2020.

Chicago/Turabian Style

Xuancang Wang; Guanyu Ji; Yi Zhang; Yuchen Guo; Jing Zhao. 2021. "Research on High- and Low-Temperature Characteristics of Bitumen Blended with Waste Eggshell Powder." Materials 14, no. 8: 2020.

Journal article
Published: 01 January 2021 in Journal of Shenzhen University Science and Engineering
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When cement stabilized gravel materials are used as pavement base and sub-base, irreversible fatigue damage often occurs due to insufficient maintenance days during the construction period and overload of vehicle load. In order to obtain the fatigue damage caused by the construction load on the cement stabilized gravel sub-base, the flexural tensile strength test and the fatigue test are carried out based on Miner theory and ABAQUS software. Under 9 kinds of vehicle load, we analyze both the relationship between the maximum tensile stress of the sub-base layer and the substrate thickness when the substrate thickness is 16, 20, 24, 28, and 32 cm and the relationship between the maximum tensile stress of the sub-base layer and the modulus of the sub-base when the modulus of the subbase is 400, 800, 1 200, 1 600, and 2 000 MPa, respectively. The research results show that with the increase of the thickness of the sub-base layer, the tensile stress of the sub-base decreases gradually, and the maximum reduction rate is 8.8%. With the growth of the sub-base modulus, the bottom tensile stress of the sub-base layer increases gradually, but the growth rate continues to decrease. Relying on the actual engineering project, the fatigue prediction equation of the cement stabilized gravel sub-base can be obtained by using Miner theory to calculate the fatigue damage degree of the subbase caused by different construction loads under different working conditions, which provides guidance for the design and construction of the pavement.

ACS Style

Naren Fang; Shiqing Hu; Xuancang Wang; QiQi Li; Lei Xin. Fatigue damage analysis of cement stabilized sub-base during construction period. Journal of Shenzhen University Science and Engineering 2021, 38, 61 -68.

AMA Style

Naren Fang, Shiqing Hu, Xuancang Wang, QiQi Li, Lei Xin. Fatigue damage analysis of cement stabilized sub-base during construction period. Journal of Shenzhen University Science and Engineering. 2021; 38 (01):61-68.

Chicago/Turabian Style

Naren Fang; Shiqing Hu; Xuancang Wang; QiQi Li; Lei Xin. 2021. "Fatigue damage analysis of cement stabilized sub-base during construction period." Journal of Shenzhen University Science and Engineering 38, no. 01: 61-68.

Research article
Published: 18 December 2020 in Advances in Civil Engineering
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In order to verify the interlayer bonding effect of double-layer continuous paving technology of the thick cement-stabilized base and solve the construction quality control problem of the double-layer continuous paving, based on the interlayer bonding mechanism and the evenness passing mechanism, the laboratory interlayer adhesion test, field test of evenness disturbance, and compaction test were conducted to verify the continuous paving interlayer bonding state. The effect of interval time on interlayer bonding state, evenness, and compactness was analyzed, and construction quality control measures were proposed. The test results show that the double-layer continuous paving process could significantly improve the interlayer bonding state, but there is still a gap from the ideal state (completely continuous). The pull-off strength of continuous paving specimens was 2.1 times that of the discontinuous paving specimens; the shear strength was 2.4 times that of discontinuous paving specimens. At different paving intervals, the longitudinal evenness of the upper and lower layers has little difference. The 140 kN axle load controls the transverse evenness disturbance within 3 mm, which met the requirements of the specification. Based on the evenness passing mechanism, the evenness control standard of double-layer continuous paving base was proposed. The compaction process of double-layer continuous paving base was proposed, and the feasibility was verified through the field test of compaction. The best interval time for double-layer continuous paving was also proposed; it is recommended that the best time for paving the upper layer is after the lower layer is laid for 6 hours (the final setting time of the cement). The construction quality control measures proposed in this study provide a theoretical basis for the construction of double-layer continuous paving technology with thick cement-stabilized base.

ACS Style

Longting Ding; Xuancang Wang; Mengyuan Zhang; Jiaqi Meng; Tao Hu. Construction Quality Control Study of Double-Layer Continuous Paving for Large-Thickness Cement-Stabilized Base. Advances in Civil Engineering 2020, 2020, 1 -13.

AMA Style

Longting Ding, Xuancang Wang, Mengyuan Zhang, Jiaqi Meng, Tao Hu. Construction Quality Control Study of Double-Layer Continuous Paving for Large-Thickness Cement-Stabilized Base. Advances in Civil Engineering. 2020; 2020 ():1-13.

Chicago/Turabian Style

Longting Ding; Xuancang Wang; Mengyuan Zhang; Jiaqi Meng; Tao Hu. 2020. "Construction Quality Control Study of Double-Layer Continuous Paving for Large-Thickness Cement-Stabilized Base." Advances in Civil Engineering 2020, no. : 1-13.

Journal article
Published: 10 October 2020 in Cold Regions Science and Technology
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Compared with traditional deicing method, microwave deicing method has advantages of high energy utilization rate, good deicing effect, environmental protection and economy. In order to improve the microwave deicing efficiency of iced pavement, a microwave heating test of asphalt mixture is designed based on microwave pavement mechanism, which proves the theoretical feasibility of microwave deicing technology. Based on the microwave heating test of the type and content of absorbing materials, the superiority of the absorbing material ferric aluminum mixture (mixing Al2O3 and Fe3O4 with 1:1) and hydroxy iron powder RW as microwave deicing sensitive materials is determined, and the optimal blending mass ratios are 1% and 5%. Then the optimal materials at different microwave frequencies are obtained. When the microwave frequency is 2.45 GHz, the ferric aluminum mixture with a mass ratio of 1% is preferably added. When the microwave frequency is 5.8 GHz, the hydroxy iron powder RW with a mass ratio of 5% is preferably added. Finally, the reliability of road performance is verified, which indicates that the development of the new microwave sensitive material can improve the efficiency of microwave deicing and provide theoretical guidance for the application of microwave deicing technology.

ACS Style

Longting Ding; Xuancang Wang; Xuzhong Cui; Mengyuan Zhang; Bing Chen. Development and performance research of new sensitive materials for microwave deicing pavement at different frequencies. Cold Regions Science and Technology 2020, 181, 103176 .

AMA Style

Longting Ding, Xuancang Wang, Xuzhong Cui, Mengyuan Zhang, Bing Chen. Development and performance research of new sensitive materials for microwave deicing pavement at different frequencies. Cold Regions Science and Technology. 2020; 181 ():103176.

Chicago/Turabian Style

Longting Ding; Xuancang Wang; Xuzhong Cui; Mengyuan Zhang; Bing Chen. 2020. "Development and performance research of new sensitive materials for microwave deicing pavement at different frequencies." Cold Regions Science and Technology 181, no. : 103176.

Journal article
Published: 10 May 2020 in Applied Sciences
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Lignin, as a bio-based waste, has been utilized in the asphalt industry due to various advantages. This study aimed to investigate the effects of two lignin products (lignin powder and lignin fiber) on the mechanical properties of asphalt mixtures. The raveling, rutting, thermal and fatigue cracking resistance, and moisture susceptibility of different asphalt mixtures were respectively evaluated by the Cantabro test, wheel loading tracking test, semicircular bending test, four-point beam bending test, and freezing-thaw cyclic test. Results show that asphalt mixture with lignin powder-modified asphalt improved the overall mechanical performance. However, lignin fiber showed contradictory effects on certain mechanical properties, i.e., improved rutting resistance and thermal cracking resistance of asphalt mixture, degraded abrasion resistance, fatigue performance, and moisture stability. Therefore, cautions need to be taken when incorporating lignin fiber into asphalt mixture.

ACS Style

Yi Zhang; Xuancang Wang; Guanyu Ji; Zhenyang Fan; Yuchen Guo; Wenze Gao; Lei Xin. Mechanical Performance Characterization of Lignin-Modified Asphalt Mixture. Applied Sciences 2020, 10, 3324 .

AMA Style

Yi Zhang, Xuancang Wang, Guanyu Ji, Zhenyang Fan, Yuchen Guo, Wenze Gao, Lei Xin. Mechanical Performance Characterization of Lignin-Modified Asphalt Mixture. Applied Sciences. 2020; 10 (9):3324.

Chicago/Turabian Style

Yi Zhang; Xuancang Wang; Guanyu Ji; Zhenyang Fan; Yuchen Guo; Wenze Gao; Lei Xin. 2020. "Mechanical Performance Characterization of Lignin-Modified Asphalt Mixture." Applied Sciences 10, no. 9: 3324.

Journal article
Published: 02 May 2020 in Applied Sciences
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The purpose of asphalt pavement structural design is to get a materially-coordinated and structurally-durable product, and a pavement structure with good road performance by combining the structural layer materials reasonably. However, due to lack of a rational evaluation index on the parameter combinations of structural layer materials, the structural layer materials are poor in terms of coordination, have low efficiency, and the actual use period is much lower than the designed working life. Therefore, it is very important to conduct research evaluating the coordination of the structural layer materials. In this study, the sensitivity of mechanical parameters and equivalent envelope area are proposed as new indexes to evaluate the coordination of material design of asphalt pavement structure layers. Software is developed to calculate the equivalent envelope area that can quantitatively evaluate the coordination among different layers and visualize the mechanical transfer behavior of each structural layer. Based on the equivalent envelope area index, this study incorporates two new steps in the design of pavements, namely the structural form comparison and optimization, and proposes a new structural design process. Finally, the rationality and reliability of the equivalent envelope area index are verified by presenting fatigue life calculation and field verification in a test road. The results propose a clear evaluation index of the coordination of material design of each structural layer, which makes the structural design of the asphalt pavement more scientific and reasonable.

ACS Style

Hao Li; Naren Fang; Xuancang Wang; Chuanhai Wu; Yang Fang. Evaluation of the Coordination of Structural Layers in the Design of Asphalt Pavement. Applied Sciences 2020, 10, 3178 .

AMA Style

Hao Li, Naren Fang, Xuancang Wang, Chuanhai Wu, Yang Fang. Evaluation of the Coordination of Structural Layers in the Design of Asphalt Pavement. Applied Sciences. 2020; 10 (9):3178.

Chicago/Turabian Style

Hao Li; Naren Fang; Xuancang Wang; Chuanhai Wu; Yang Fang. 2020. "Evaluation of the Coordination of Structural Layers in the Design of Asphalt Pavement." Applied Sciences 10, no. 9: 3178.

Journal article
Published: 24 March 2020 in Materials
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Thermo-oxidative ageing is one of the main factors affecting bitumen performance. At present, the research on bitumen ageing has entered the micro stage. The purpose of this paper was to study the relationship between nano-morphology parameters and properties of bitumen of bitumen during the ageing process. To this end, bitumen with different ageing degrees was prepared in this paper, and Atomic force microscopy samples with different cooling rates were prepared. The relationship between ageing degree of bitumen and nano-morphology parameters was analyzed. A functional relationship model between nano-morphology parameters and properties of bitumen was established. The results show that the percentage of bee-like structure area (Pbee−like), maximum amplitude (Hmax) and roughness (Rq) increased with the increase of ageing degree. the percentage of bee-like structure area, the maximum amplitude and the roughness increase with the increase of cooling rate. With the increase of the percentage of bee-like structure area, the maximum amplitude and the roughness, the viscosity of bitumen at 60 °C increases, penetration decreases, and softening point increases. There is a nonlinear relationship between the nano-morphology parameters and properties of bitumen.

ACS Style

Mengyuan Zhang; Xuancang Wang; Wengang Zhang; Longting Ding. Study on the Relationship between Nano-Morphology Parameters and Properties of Bitumen during the Ageing Process. Materials 2020, 13, 1472 .

AMA Style

Mengyuan Zhang, Xuancang Wang, Wengang Zhang, Longting Ding. Study on the Relationship between Nano-Morphology Parameters and Properties of Bitumen during the Ageing Process. Materials. 2020; 13 (6):1472.

Chicago/Turabian Style

Mengyuan Zhang; Xuancang Wang; Wengang Zhang; Longting Ding. 2020. "Study on the Relationship between Nano-Morphology Parameters and Properties of Bitumen during the Ageing Process." Materials 13, no. 6: 1472.

Research article
Published: 05 March 2020 in Advances in Materials Science and Engineering
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At present, the geogrid is commonly used to treat the differential settlement of the subgrade at the joint of the filling and excavation effectively. In order to further improve the utilization rate of geogrid in the treatment of subgrade, the driving comfort index was proposed innovatively to control the subgrade differential settlement. Based on the human-vehicle-road coupling system model, the influence of subgrade differential settlement area, subsidence value, and vehicle speed on the maximum vertical acceleration of the human body was analyzed. The correlation between the vertical acceleration of the human body under different vehicle speeds and the differential settlement value was obtained through multiple regression calculations, and the subgrade differential settlement control standard based on driving comfort was proposed. By establishing the finite element model of the cut to fill subgrade, the characteristics of differential settlement at the top surface of the subgrade under different geogrid laying positions, densities, and lengths were calculated and analyzed. In addition, the differential settlement layout scheme of the geogrid disposal subgrade based on driving comfort was proposed, and the effectiveness of the scheme was verified by experiments. The results show that the position and length of the grid are the main factors affecting the treatment effect of the vertical and horizontal cut to fill subgrade. The proposed layout scheme can effectively control the differential settlement of the subgrade and raise the utilization rate of the geogrid. The research results can provide theoretical value and reference for the laying of geogrid in mountainous roads.

ACS Style

Xuancang Wang; Longting Ding; Wenze Gao; Mengyuan Zhang; Linjie Fu. Research on Subgrade Differential Settlement Control Standard and Treatment Technology Based on Driving Comfort. Advances in Materials Science and Engineering 2020, 2020, 1 -14.

AMA Style

Xuancang Wang, Longting Ding, Wenze Gao, Mengyuan Zhang, Linjie Fu. Research on Subgrade Differential Settlement Control Standard and Treatment Technology Based on Driving Comfort. Advances in Materials Science and Engineering. 2020; 2020 ():1-14.

Chicago/Turabian Style

Xuancang Wang; Longting Ding; Wenze Gao; Mengyuan Zhang; Linjie Fu. 2020. "Research on Subgrade Differential Settlement Control Standard and Treatment Technology Based on Driving Comfort." Advances in Materials Science and Engineering 2020, no. : 1-14.

Journal article
Published: 12 February 2020 in Journal of Advanced Transportation
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Pavement performance prediction is a crucial issue in big data maintenance. This paper develops a hybrid grey relation analysis (GRA) and support vector machine regression (SVR) technique to predict pavement performance. The prediction model can solve the shortcomings of the traditional model including a single consideration factor, a short prediction period, and easy overfitting. GAR is employed in selecting the main factors affecting the performance of asphalt pavement. The SVR is performed to predict the performance. Finally, the data collected from the weather station installed on Guangyun Expressway were adopted to verify the validity of the GRA-SVR model. Meanwhile, the contrast with the grey model (GM (1, 1)), genetic algorithm optimization BP[[parms resize(1),pos(50,50),size(200,200),bgcol(156)]]081%, −0.823%, 1.270%, and −4.569%, respectively. The study concluded that the nonlinear and multivariate prediction model established by GRA-SVR has higher precision and operability, which can be used in long-period pavement performance prediction.

ACS Style

Xuancang Wang; Jing Zhao; QiQi Li; Naren Fang; Peicheng Wang; Longting Ding; Shanqiang Li. A Hybrid Model for Prediction in Asphalt Pavement Performance Based on Support Vector Machine and Grey Relation Analysis. Journal of Advanced Transportation 2020, 2020, 1 -14.

AMA Style

Xuancang Wang, Jing Zhao, QiQi Li, Naren Fang, Peicheng Wang, Longting Ding, Shanqiang Li. A Hybrid Model for Prediction in Asphalt Pavement Performance Based on Support Vector Machine and Grey Relation Analysis. Journal of Advanced Transportation. 2020; 2020 ():1-14.

Chicago/Turabian Style

Xuancang Wang; Jing Zhao; QiQi Li; Naren Fang; Peicheng Wang; Longting Ding; Shanqiang Li. 2020. "A Hybrid Model for Prediction in Asphalt Pavement Performance Based on Support Vector Machine and Grey Relation Analysis." Journal of Advanced Transportation 2020, no. : 1-14.

Research article
Published: 31 December 2019 in Journal of Advanced Transportation
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The bonding strength between the overlays of an airport asphalt pavement directly affects its service life. In this study, a finite element model of asphalt overlay on airport pavement of Juba Airport in South Sudan was established, and the elastic modulus of overlay, thickness of overlay, running state of aircraft, variation trend of interlayer shear stress under the action of load and temperature were obtained. The AHP-entropy method was used to calculate the combined weight of each influencing factor. The climate in hot and humid areas was further zoned, and a comprehensive classification of airport asphalt pavement overlay between hot and humid tropics was obtained. Four interlayer treatment measures (asphalt precoating, two oils and one aggregate, geotextile, and geogrid) and three interlayer materials (SBS-modified asphalt, ordinary hot asphalt, and SBS-modified emulsified asphalt) were designed and tested. Through shear test, wheel-load fatigue test, and pressurized seepage test, the variation trends of interlayer shear, crack resistance, and waterproofing under different combination schemes were obtained. Finally, the matching relationship between different working conditions and interlayer treatment measures was established. The results show that the actual working conditions of an airport asphalt pavement can be divided into three levels. Combined with the performance ranking of different materials and interlayer treatment measures, the recommended interlayer treatment measures for comprehensive classifications I, II, and III are two oils and one material + SBS-modified asphalt, asphalt precoating, or geogrid + SBS-modified emulsified asphalt or ordinary hot asphalt, and geotextile + ordinary hot asphalt, respectively. The working conditions in Juba Airport in South Sudan can be classified as comprehensive classification II, the recommended treatment measures for geogrid + ordinary hot asphalt.

ACS Style

Hongyu Ye; Xuancang Wang; Naren Fang; Ziyuan Su; Xiaowen Sun. Interlayer Working Conditions Classification and Treatment Measures of Airport Asphalt Pavement Overlay. Journal of Advanced Transportation 2019, 2019, 1 -16.

AMA Style

Hongyu Ye, Xuancang Wang, Naren Fang, Ziyuan Su, Xiaowen Sun. Interlayer Working Conditions Classification and Treatment Measures of Airport Asphalt Pavement Overlay. Journal of Advanced Transportation. 2019; 2019 ():1-16.

Chicago/Turabian Style

Hongyu Ye; Xuancang Wang; Naren Fang; Ziyuan Su; Xiaowen Sun. 2019. "Interlayer Working Conditions Classification and Treatment Measures of Airport Asphalt Pavement Overlay." Journal of Advanced Transportation 2019, no. : 1-16.

Journal article
Published: 10 September 2019 in Applied Sciences
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Cement-containing mineral powder can effectively improve the moisture stability of an asphalt mixture; therefore, this study systematically summarizes the research status of cement–mineral fillers on the performance of an asphalt mixture and determines the limitations of related studies. In this study, long-term performance tests of styrene-butadiene-styrene- (SBS)-modified asphalt mixtures are designed and evaluated with different blending ratios of the cement–mineral powder under three aging conditions. Moreover, the effect of the cement–mineral composite filler on long-term performance of the asphalt mixture using different blending ratios is determined. Cement improves the high-temperature performance and water stability of asphalt mixtures, but only for certain aging conditions. Considering the regulations for the road performance of asphalt mixtures for three aging conditions, as well as long-term performance considerations, the results indicated that the mass ratio of Portland cement to mineral powder must not exceed 2:2. Low-temperature bending and splitting tensile tests confirmed that an excessive amount of cement filler will embrittle the modified asphalt mixture during long-term aging, thereby deteriorating the tensile properties. The mechanism by which the filler influences the performance of the asphalt mixture should be further studied from the perspective of microscopic and molecular dynamics.

ACS Style

Zhenyang Fan; Xuancang Wang; Zhuo Zhang; Yi Zhang. Effects of Cement–Mineral Filler on Asphalt Mixture Performance under Different Aging Procedures. Applied Sciences 2019, 9, 3785 .

AMA Style

Zhenyang Fan, Xuancang Wang, Zhuo Zhang, Yi Zhang. Effects of Cement–Mineral Filler on Asphalt Mixture Performance under Different Aging Procedures. Applied Sciences. 2019; 9 (18):3785.

Chicago/Turabian Style

Zhenyang Fan; Xuancang Wang; Zhuo Zhang; Yi Zhang. 2019. "Effects of Cement–Mineral Filler on Asphalt Mixture Performance under Different Aging Procedures." Applied Sciences 9, no. 18: 3785.

Journal article
Published: 20 August 2019 in Applied Sciences
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In this study, the failure mechanism of crumb rubber–asphalt pavement was analyzed under the combined effects of low temperature, water, and traffic load. The investigation was carried out based on the mechanical and deformational properties of crumb rubber–asphalt mixture and the typical environmental and load conditions such pavement is typically exposed to. A method was proposed for objective evaluation of the interfacial adhesion between rubber crumbs and asphalt through consideration of the effects of the characteristics of the materials and the working environment. The main evaluation method used herein included the indirect tensile strength test under freeze–thaw–boiling cycle, and the Cántabro abrasion test under water-immersion was adopted as an auxiliary method. The evaluation system has the advantages of simple implementation, realistic simulation of the actual working state of the mixture, and reliable results. Moreover, it is a durability evaluation method that can be specifically applied to asphalt mixtures with some special aggregates or stone mastic asphalt (SMA) mixtures.

ACS Style

Xuancang Wang; Zhenyang Fan; Li Li; Hongyao Wang; Minghui Huang; Li. Durability Evaluation Study for Crumb Rubber–Asphalt Pavement. Applied Sciences 2019, 9, 3434 .

AMA Style

Xuancang Wang, Zhenyang Fan, Li Li, Hongyao Wang, Minghui Huang, Li. Durability Evaluation Study for Crumb Rubber–Asphalt Pavement. Applied Sciences. 2019; 9 (16):3434.

Chicago/Turabian Style

Xuancang Wang; Zhenyang Fan; Li Li; Hongyao Wang; Minghui Huang; Li. 2019. "Durability Evaluation Study for Crumb Rubber–Asphalt Pavement." Applied Sciences 9, no. 16: 3434.

Journal article
Published: 11 June 2019 in Cold Regions Science and Technology
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To obtain reasonable electric heat pipe embedding schemes (EHP-ES) of the snow-melting pavement in cold regions, the mechanical properties of the snow-melting pavement with electric heat pipe (SMP-EHP) were investigated by laboratory experiments and finite element simulations. The bending experiments and melting experiments were conducted to analyze the effect of EHP-ES on the mechanical properties of the concrete slab. Additionally, the finite element model was established to simulate the actual SMP-EHP in cold regions. The allowable flexural tensile strength of cement concrete was used as the judgment index to determine the reasonableness of EHP-ES. In this case, the mechanical properties of concrete slabs with different EHP-ES were studied under two most unfavorable conditions. Based on the experimental and simulated results, the design criteria of the EHP-ES was proposed, and the reasonable EHP-ES (embedding depth: 14.0-16cm, embedding spacing: 12.0 cm-18.0 cm) were obtained. Finally, a test road in Tibet was paved to verify the feasibility of the above reasonable EHP-ES further. The research results could enrich the design of EHP-ES for snow-melting pavement in cold regions from the aspect of the mechanical properties of the concrete slab.

ACS Style

Kai Liu; Chaoliang Fu; Hongzhou Xie; Fang Wang; Xuancang Wang; Haijian Bai. Design of electric heat pipe embedding schemes for snow-melting pavement based on mechanical properties in cold regions. Cold Regions Science and Technology 2019, 165, 102806 .

AMA Style

Kai Liu, Chaoliang Fu, Hongzhou Xie, Fang Wang, Xuancang Wang, Haijian Bai. Design of electric heat pipe embedding schemes for snow-melting pavement based on mechanical properties in cold regions. Cold Regions Science and Technology. 2019; 165 ():102806.

Chicago/Turabian Style

Kai Liu; Chaoliang Fu; Hongzhou Xie; Fang Wang; Xuancang Wang; Haijian Bai. 2019. "Design of electric heat pipe embedding schemes for snow-melting pavement based on mechanical properties in cold regions." Cold Regions Science and Technology 165, no. : 102806.

Journal article
Published: 21 May 2019 in Applied Sciences
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Shear fatigue damage to the waterproof cohesive layer has not received enough attention in bridge deck pavement design. Meanwhile, there is less theoretical basis for the design of a waterproof cohesive layer. In this study, direct shear and shear fatigue tests were used to compare the shear strength and fatigue performance of waterproof adhesive materials under different disposal schemes for a cement slab surface, bonding materials, and spreading schemes, and the recommended optimal dosage of waterproof adhesive material for the bridge deck is given. Based on the shear fatigue tests results of indoor waterproof adhesive materials, an equation for prediction fatigue at 15 °C was established and temperature correction was applied. Based on these results, we propose a waterproof cohesive layer design method for bridge deck pavement with interlayer shear damage as the design index. The life expectancy of the shear damage between the decks was calculated for a real bridge deck. These results provide scientific guidance for design of a waterproof cohesive layer in a bridge deck, which can effectively extend the service life of a bridge deck.

ACS Style

Naren Fang; Xuancang Wang; Hongyu Ye; Yaoning Sun; Ziyuan Su; Lun Yuan. Study on Fatigue Characteristics and Interlayer Design Method of Waterproof Cohesive Bridge Deck Layer. Applied Sciences 2019, 9, 2090 .

AMA Style

Naren Fang, Xuancang Wang, Hongyu Ye, Yaoning Sun, Ziyuan Su, Lun Yuan. Study on Fatigue Characteristics and Interlayer Design Method of Waterproof Cohesive Bridge Deck Layer. Applied Sciences. 2019; 9 (10):2090.

Chicago/Turabian Style

Naren Fang; Xuancang Wang; Hongyu Ye; Yaoning Sun; Ziyuan Su; Lun Yuan. 2019. "Study on Fatigue Characteristics and Interlayer Design Method of Waterproof Cohesive Bridge Deck Layer." Applied Sciences 9, no. 10: 2090.

Articles
Published: 10 May 2019 in Road Materials and Pavement Design
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Pavement images have been utilised to detect distresses. However, existing methods for detecting pavement distresses are not acceptable owing to the various real-world conditions. To complete the task, a novel detection method based on faster region convolutional neural network (Faster R-CNN) was utilised to recognise and locate pavement distresses including crack, pothole, oil bleeding and dot surface autonomously. Twenty Faster R-CNNs were trained and tested by 6498 pavement images. Then the performance of training was analysed to select the optimal Faster R-CNN. At last, a test and a comparative study were presented to verify the stability and superiority of the optimal one. In the testing, average results of the accuracy rates, recall rates and location errors in the optimal one were 90.4%, 89.1% and 6.521 pixels, which were close to average results of training and validation. It indicated the optimal Faster R-CNN had good performance to detect distresses in different pavements. Compared with the CNN and K-value method, the optimal Faster R-CNN located pavement distresses with bounding boxes more precisely.

ACS Style

Liang Song; Xuancang Wang. Faster region convolutional neural network for automated pavement distress detection. Road Materials and Pavement Design 2019, 22, 23 -41.

AMA Style

Liang Song, Xuancang Wang. Faster region convolutional neural network for automated pavement distress detection. Road Materials and Pavement Design. 2019; 22 (1):23-41.

Chicago/Turabian Style

Liang Song; Xuancang Wang. 2019. "Faster region convolutional neural network for automated pavement distress detection." Road Materials and Pavement Design 22, no. 1: 23-41.

Journal article
Published: 03 May 2019 in Construction and Building Materials
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Considering the typical climatic environment and geological characteristics of Xinjiang, China, this study systematically investigated the influence of different factors on the arch expansion characteristics of cement-stabilized macadam base materials through a low-temperature salt expansion test, penetration test, thermal conductivity test, strength test, freeze–thaw cycle test and microscopic test, and proposed a reasonable range of design indicators. The mechanism of arch expansion was further elucidated. The results showed that the sensitive temperature range for cement-stabilized macadam materials is −12.5 to −5 °C. Reasonable salt content, water content, cement content, compaction or the rate of temperature decrease can slow the deformation due to arch expansion. The total salt content of cement-stabilized macadam should not exceed 0.2%, and the water content should not exceed 4.0%. It is suggested that the skeleton compact structure should be used to reduce the stress effect of salt expansion on the material.

ACS Style

Liang Song; Zhi Song; Chaohui Wang; Xuancang Wang; GongXin Yu. Arch expansion characteristics of highway cement-stabilized macadam base in Xinjiang, China. Construction and Building Materials 2019, 215, 264 -274.

AMA Style

Liang Song, Zhi Song, Chaohui Wang, Xuancang Wang, GongXin Yu. Arch expansion characteristics of highway cement-stabilized macadam base in Xinjiang, China. Construction and Building Materials. 2019; 215 ():264-274.

Chicago/Turabian Style

Liang Song; Zhi Song; Chaohui Wang; Xuancang Wang; GongXin Yu. 2019. "Arch expansion characteristics of highway cement-stabilized macadam base in Xinjiang, China." Construction and Building Materials 215, no. : 264-274.

Cementitious materials
Published: 01 April 2019 in Journal of Wuhan University of Technology-Mater. Sci. Ed.
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To research the possibility of steel-making dust as a kind of mineral filler in asphalt mixture, two steel-making dusts and one ordinary mineral filler were adopted. The specific density, specific surface area, fineness modulus and mineralogy component of the dusts were tested. Scanning electron microscopy (SEM) was carried out to research the microstructure of the dusts; dynamic shear rheological (DSR) test and time sweep test were used to research the high temperature and fatigue performance of asphalt mortars containing steel-making dust. The experimental results indicate that, compared with ordinary mineral filler, steel-making dusts have more active ingredients, difference surface characteristics and micro-structure. Furthermore, the high temperature and fatigue performance of steel-making dusts corresponding asphalt mortars are superior to those of reference group. Therefore, the steel-making dust would be an alternative to the ordinary mineral filler to improve the performance of asphalt mortars and reduce the harm of the dusts to the environment at the same time.

ACS Style

Liang Song; Xuancang Wang; Xiaotong Li; Qun Yang; Peng Wang. Influence of the Steel-making Dust on High Temperature and Fatigue Performance of Asphalt Mortars. Journal of Wuhan University of Technology-Mater. Sci. Ed. 2019, 34, 361 -367.

AMA Style

Liang Song, Xuancang Wang, Xiaotong Li, Qun Yang, Peng Wang. Influence of the Steel-making Dust on High Temperature and Fatigue Performance of Asphalt Mortars. Journal of Wuhan University of Technology-Mater. Sci. Ed.. 2019; 34 (2):361-367.

Chicago/Turabian Style

Liang Song; Xuancang Wang; Xiaotong Li; Qun Yang; Peng Wang. 2019. "Influence of the Steel-making Dust on High Temperature and Fatigue Performance of Asphalt Mortars." Journal of Wuhan University of Technology-Mater. Sci. Ed. 34, no. 2: 361-367.

Research article
Published: 25 February 2019 in Advances in Materials Science and Engineering
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Gussasphalt is widely used in steel deck pavement in cold regions; thus, it should have good low-temperature performance. A method for evaluating the low-temperature performance of gussasphalt is presented in this paper. Low-temperature bending, bending creep, and splitting tests were used to study the performance of different types of gussasphalt. The sensitivity and correlation between low-temperature indices obtained from three methods were compared and analyzed with sensitivity factors and the grey relational coefficient, respectively, and the low-temperature evaluation index and standard of gussasphalt in cold regions were determined. Flow, penetration at 50°C, low-temperature bending, and bending fatigue tests of the trabeculae were carried out after secondary mixing of gussasphalt asphalt concrete. Degradation of the material performance after different storage times was studied. Finally, taking the strain energy density as the main control index and considering the fluidity, the high-temperature performance, fatigue characteristics, technical requirements for storage, and mixing time of gussasphalt in cold weather after two mixing procedures are discussed.

ACS Style

Hongyu Ye; Xuancang Wang; Naren Fang; Ziyuan Su. Low-Temperature Performance and Evaluation Index of Gussasphalt for Steel Bridge Decks. Advances in Materials Science and Engineering 2019, 2019, 1 -11.

AMA Style

Hongyu Ye, Xuancang Wang, Naren Fang, Ziyuan Su. Low-Temperature Performance and Evaluation Index of Gussasphalt for Steel Bridge Decks. Advances in Materials Science and Engineering. 2019; 2019 ():1-11.

Chicago/Turabian Style

Hongyu Ye; Xuancang Wang; Naren Fang; Ziyuan Su. 2019. "Low-Temperature Performance and Evaluation Index of Gussasphalt for Steel Bridge Decks." Advances in Materials Science and Engineering 2019, no. : 1-11.