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Yuanzhao Chen
School of Civil Engineering and communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China

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Journal article
Published: 10 August 2021 in Sustainability
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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.

ACS Style

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 Style

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 (16):8932.

Chicago/Turabian Style

Tengteng 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.

Journal article
Published: 29 June 2021 in Sustainability
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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.

ACS Style

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 Style

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 (13):7284.

Chicago/Turabian Style

Decai 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.

Journal article
Published: 29 August 2020 in Construction and Building Materials
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The purpose is to enhance the service life of heavy cross asphalt pavement and maintain good road performance throughout the service cycle. Graphene nanoplatelets/rubber crowd composite modified asphalt were prepared. The influence of different temperature and frequency on the high temperature performance of composite modified asphalt was evaluated. The viscoelastic energy of composite modified asphalt under different stress and different temperature was assessed. The rheological properties of GNPs/rubber powder composite modified asphalt at low temperature were studied. The microstructure and ir spectra of composite modified asphalt were compared and analyzed. The results show that the high and low temperature properties and viscoelasticity of rubber powder modified asphalt can be improved by adding GNPs. GNPs/rubber powder composite modified asphalt can effectively improve the performance of asphalt pavement in high temperature and heavy load traffic. The combination of GNPs and rubber powder improves the crack resistance of asphalt at low temperature. By analyzing the microscopic mechanism, it can be seen that GNPs has optimized the segregation phenomenon of rubber powder modified asphalt and improved the adhesion between asphalt and ore in the composite modified asphalt mixture.

ACS Style

Yuanzhao Chen; Qian Wang; Zhenxia Li; Siqing Ding. Rhysiological properties of graphene nanoplatelets/rubber crowd composite modified asphalt. Construction and Building Materials 2020, 261, 120505 .

AMA Style

Yuanzhao Chen, Qian Wang, Zhenxia Li, Siqing Ding. Rhysiological properties of graphene nanoplatelets/rubber crowd composite modified asphalt. Construction and Building Materials. 2020; 261 ():120505.

Chicago/Turabian Style

Yuanzhao Chen; Qian Wang; Zhenxia Li; Siqing Ding. 2020. "Rhysiological properties of graphene nanoplatelets/rubber crowd composite modified asphalt." Construction and Building Materials 261, no. : 120505.

Journal article
Published: 07 July 2019 in Materials
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An experimental study was conducted to investigate the effect ofnano-SiO2 and steel fiber content on the durability of concrete. Five different dosages of nano-SiO2 particles and five volume dosages of steel fiber were used. The durability of concretes includes permeability resistance, cracking resistance, carbonation resistance, and freezing-thawing resistance, and these were evaluated by the water permeation depth, number of cracks, total cracking area per unit area of the specimens, carbonation depth of the specimens, and the relative dynamic elastic modulus of the specimens after freezing-thawing cycles, respectively. The results indicate that the addition of nano-SiO2 particles significantly improves the durability of concrete when the content of nano-SiO2 is limited within a certain range. With the increase of nano-SiO2 content, the durability of concrete first increases and then decreases. An excessive number of nano-SiO2 particles could have an adverse effect on the durability of the concrete. The addition of the correct amount of steel fibers improves the carbonation resistance of concrete containing nano-particles, but excessive steel fiber reduces the carbonation resistance. Moreover, the addition of steel fibers reduces the permeability resistance of concrete containing nano-particles. The incorporation of steel fiber enhanced the freezing-thawing resistance and cracking resistance of concrete containing nano-particles. With increasing steel fiber content, the freezing-thawing resistance of the concrete containing nano-particles increases, and the cracking resistance of the concrete decreases gradually.

ACS Style

Peng Zhang; Qingfu Li; Yuanzhao Chen; Yan Shi; Yi-Feng Ling. Durability of Steel Fiber-Reinforced Concrete Containing SiO2 Nano-Particles. Materials 2019, 12, 2184 .

AMA Style

Peng Zhang, Qingfu Li, Yuanzhao Chen, Yan Shi, Yi-Feng Ling. Durability of Steel Fiber-Reinforced Concrete Containing SiO2 Nano-Particles. Materials. 2019; 12 (13):2184.

Chicago/Turabian Style

Peng Zhang; Qingfu Li; Yuanzhao Chen; Yan Shi; Yi-Feng Ling. 2019. "Durability of Steel Fiber-Reinforced Concrete Containing SiO2 Nano-Particles." Materials 12, no. 13: 2184.