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The purpose of this study is to further improve the road performance and emission reduction effect of tourmaline-modified asphalt. Graphene was used to enhance the performance of tourmaline-modified asphalt, and graphene/tourmaline-composite-modified asphalt was prepared. The temperature susceptibility, high temperature, anti-aging properties and rheological performance of the modified asphalt were studied. The test method of emission reduction efficiency of the modified asphalt and its mixture was proposed. The emission reduction effect of different modified asphalts and its mixture was evaluated. The enhancement effect of graphene on the properties of tourmaline-modified asphalt was confirmed. It provides a reference for the performance enhancement of inorganic material modified asphalt. The results show that the temperature susceptibility, high temperature, anti-aging properties and rheological performance of the graphene/tourmaline-composite-modified asphalt are better than those of the tourmaline-modified asphalt and base asphalt. The asphalt fume reduction rate of graphene/tourmaline-composite-modified asphalt is higher than that of tourmaline-modified asphalt. With the increase of graphene content, the emission reduction performance increases gradually, and the enhancement effect of graphene on tourmaline performance is more obvious.
Tengteng Guo; Hao Fu; Chaohui Wang; Haijun Chen; Qian Chen; Qing Wang; Yuanzhao Chen; Zhenxia Li; Aijiu Chen. Road Performance and Emission Reduction Effect of Graphene/Tourmaline-Composite-Modified Asphalt. Sustainability 2021, 13, 8932 .
AMA StyleTengteng Guo, Hao Fu, Chaohui Wang, Haijun Chen, Qian Chen, Qing Wang, Yuanzhao Chen, Zhenxia Li, Aijiu Chen. Road Performance and Emission Reduction Effect of Graphene/Tourmaline-Composite-Modified Asphalt. Sustainability. 2021; 13 (16):8932.
Chicago/Turabian StyleTengteng Guo; Hao Fu; Chaohui Wang; Haijun Chen; Qian Chen; Qing Wang; Yuanzhao Chen; Zhenxia Li; Aijiu Chen. 2021. "Road Performance and Emission Reduction Effect of Graphene/Tourmaline-Composite-Modified Asphalt." Sustainability 13, no. 16: 8932.
In order to study the mechanical properties and effect of a regenerant on a cold recycled mixture with asphalt emulsions (CRMEs), the moisture susceptibility, high-temperature performance, low-temperature performance, dynamic mechanical properties and durability of CRMEs were analyzed and evaluated by immersion splitting strength tests, freeze-thaw splitting strength tests, rutting tests, semi-circle bending tests, uniaxial compression dynamic modulus tests and indirect tensile tests. Scanning electron microscopy (SEM) was used to analyze the micromorphology of CRMEs modified with regenerant. Finally, a comprehensive evaluation system of five different CRMEs was established based on the efficacy coefficient method to quantitatively analyze the comprehensive performance of the CRMEs. The test results showed that the regenerant can significantly improve the water immersion splitting strength, freeze-thaw splitting strength fracture energy density, and fatigue resistance of CRMEs. However, the addition of regenerant affected the high-temperature performance of the cold recycled mixture. The dynamic modulus of the CRMEs first increased and then decreased with regenerant content increasing. When the regenerant content was 8%, the dynamic modulus of the CRMEs was the highest. Adding styrene-butadiene rubber (SBR) latex can improve the high-temperature performance of CRMEs, but the moisture susceptibility, low temperature performance and fatigue resistance of the cold recycled mixture were not significantly improved, and the dynamic modulus of the mixture was reduced. Based on the efficacy coefficient method, the optimal content of regenerant is 8%. Regenerant are potential modifiers for cold recycled mixture that they can significantly improve the dynamic mechanical properties and durability.
Decai Wang; Tengteng Guo; Haolei Chang; Xianhua Yao; Yuanzhao Chen; Tongning Wang. Research on the Performance of Regenerant Modified Cold Recycled Mixture with Asphalt Emulsions. Sustainability 2021, 13, 7284 .
AMA StyleDecai Wang, Tengteng Guo, Haolei Chang, Xianhua Yao, Yuanzhao Chen, Tongning Wang. Research on the Performance of Regenerant Modified Cold Recycled Mixture with Asphalt Emulsions. Sustainability. 2021; 13 (13):7284.
Chicago/Turabian StyleDecai Wang; Tengteng Guo; Haolei Chang; Xianhua Yao; Yuanzhao Chen; Tongning Wang. 2021. "Research on the Performance of Regenerant Modified Cold Recycled Mixture with Asphalt Emulsions." Sustainability 13, no. 13: 7284.
Five-phase fractional slot concentrated winding permanent magnet (FSCWPM) machine with equal/unequal stator teeth can improve the torque density by added third harmonic current injection (Sin + 3rd). However, the injection of the third harmonic current will change the stator, rotor, and PM losses, and thus the thermal distribution. Therefore, it is necessary to conduct a comparative study on the losses and the thermal performances of the five-phase FSCWPM machine with the sine current supply and Sin + 3rd current supply. In this paper, the structures of the five-phase FSCWPM machines with equal/unequal stator teeth are illustrated, and their losses characteristic at different rotating speeds including copper loss, PM loss, and iron-core loss are comparatively analyzed under the same output torque constraint. Then, their thermal distributions are investigated based on the coupling of electromagnetic-thermal calculation of the 3D finite element (FE) method. The results demonstrate that the five-phase FSCWPM machines energized with the Sin + 3rd current have a better thermal performance at a low rotating speed, especially the five-phase FSCWPM machine with unequal stator teeth. Furthermore, the thermal experiment concerning a five-phase FSCWPM machine with unequal stator teeth is conducted to verify the validity of the related analysis.
Haijun Chen; Tengteng Guo; Lufeng Zhang. Comparative Study of Power Loss and Thermal Performance in Five-Phase FSCWPM Machine With/Without Third Harmonic Current Injection. Journal of Electrical Engineering & Technology 2021, 16, 2099 -2108.
AMA StyleHaijun Chen, Tengteng Guo, Lufeng Zhang. Comparative Study of Power Loss and Thermal Performance in Five-Phase FSCWPM Machine With/Without Third Harmonic Current Injection. Journal of Electrical Engineering & Technology. 2021; 16 (4):2099-2108.
Chicago/Turabian StyleHaijun Chen; Tengteng Guo; Lufeng Zhang. 2021. "Comparative Study of Power Loss and Thermal Performance in Five-Phase FSCWPM Machine With/Without Third Harmonic Current Injection." Journal of Electrical Engineering & Technology 16, no. 4: 2099-2108.
Recycling scrap tyres as alternative aggregates of concrete is an innovative option. To clarify the dynamic properties of the pretreated rubberized concrete with some cumulative damage, the natural frequency, flexural dynamic stiffness, and damping ratio of the specimens under incremental stress level were investigated in this paper. The results indicated that the pretreatment of rubber particles improved the strength, ductility, and crack resistance of the rubberized concrete. The reduction of the flexural dynamic stiffness was clarified with the increase of concrete stress level. The addition of the pretreated rubber particles enhanced the concrete energy dissipation capacity during the destruction, and the specimen dissipated more energy with the increase of rubber content before its failure.
Aijiu Chen; Xiaoyan Han; Zhihao Wang; Tengteng Guo. Dynamic Properties of Pretreated Rubberized Concrete under Incremental Loading. Materials 2021, 14, 2183 .
AMA StyleAijiu Chen, Xiaoyan Han, Zhihao Wang, Tengteng Guo. Dynamic Properties of Pretreated Rubberized Concrete under Incremental Loading. Materials. 2021; 14 (9):2183.
Chicago/Turabian StyleAijiu Chen; Xiaoyan Han; Zhihao Wang; Tengteng Guo. 2021. "Dynamic Properties of Pretreated Rubberized Concrete under Incremental Loading." Materials 14, no. 9: 2183.
This study addresses how to reduce the emission of asphalt smoke in the construction process of traditional hot mix asphalt mixture. The graphene/tourmaline composites were prepared based on tourmaline having the effect of adsorbing pollutants. The basic properties of composites and their adsorption effect on asphalt smoke were analyzed. Then, the composite powder was added into the environment-friendly asphalt mixture as filler. And the pavement performances and emission reduction performance of asphalt mixtures were studied. The results indicated that the basic properties of composite powder meet the requirements of specifications about filler in asphalt mixtures. Composite powder could be used to replace part of mineral powder, and the optimum replacement content was 17–20 wt%. The environment-friendly asphalt mixtures can effectively reduce asphalt smoke emission. The reduction rate of emission can reach 76.9–80.5%.
Qian Chen; Chaohui Wang; Zhi Qiao; Tengteng Guo. Graphene/tourmaline composites as a filler of hot mix asphalt mixture: Preparation and properties. Construction and Building Materials 2019, 239, 117859 .
AMA StyleQian Chen, Chaohui Wang, Zhi Qiao, Tengteng Guo. Graphene/tourmaline composites as a filler of hot mix asphalt mixture: Preparation and properties. Construction and Building Materials. 2019; 239 ():117859.
Chicago/Turabian StyleQian Chen; Chaohui Wang; Zhi Qiao; Tengteng Guo. 2019. "Graphene/tourmaline composites as a filler of hot mix asphalt mixture: Preparation and properties." Construction and Building Materials 239, no. : 117859.
Conductive gussasphalt mixture can melt snow on the bridge deck, but it may corrode steel bridge deck and have an impact on traffic environment and safety when the power is on. To solve this problem, five conductive gussasphalt mixtures were prepared, and the effects of mixture type, working conditions and environmental factors of conductive gussasphalt mixture on corrosion of steel bridge deck was studied systemically. Based on the extreme learning machine optimized by genetic algorithm, the corrosion degree prediction model of steel bridge deck was established. The results indicated that number of times on power, mixture type and temperature had significant effects on the corrosion of steel deck, and their contribution rates were 58.47%, 24.62% and 15.40%, respectively. After optimization by genetic algorithm, the error of extreme learning machine model was 0.40–9.25%. Compared with the traditional extreme learning machine model, they decreased by 5.31–10.63%.
Qian Chen; Chaohui Wang; Xiaolong Sun; Yangsen Cao; Tengteng Guo; Jiao Chen. Evaluation and prediction for effect of conductive gussasphalt mixture on corrosion of steel bridge deck. Construction and Building Materials 2019, 228, 116837 .
AMA StyleQian Chen, Chaohui Wang, Xiaolong Sun, Yangsen Cao, Tengteng Guo, Jiao Chen. Evaluation and prediction for effect of conductive gussasphalt mixture on corrosion of steel bridge deck. Construction and Building Materials. 2019; 228 ():116837.
Chicago/Turabian StyleQian Chen; Chaohui Wang; Xiaolong Sun; Yangsen Cao; Tengteng Guo; Jiao Chen. 2019. "Evaluation and prediction for effect of conductive gussasphalt mixture on corrosion of steel bridge deck." Construction and Building Materials 228, no. : 116837.