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Xiaowen Zhao - One of the best experts on this subject based on the ideXlab platform.

  • Laboratory Research on the Properties of Warm Amorphous Poly Alpha Olefin–Modified Asphalt Mixture Using Sasobit and Deurex
    Journal of Materials in Civil Engineering, 2018
    Co-Authors: Xiaowen Zhao, Kezhen Yan, Shu Yang, Hanyu Peng
    Abstract:

    AbstractThe purpose of this study was to investigate the effects of warm mix additive Sasobit and Deurex on the properties of amorphous poly alpha olefin (APAO) modified asphalt (AMB) mixture. Mars...

  • The laboratory performance of asphalt mixture with Amorphous poly alpha olefins (APAO) modified asphalt binder
    Construction and Building Materials, 2018
    Co-Authors: Kezhen Yan, Xiaowen Zhao
    Abstract:

    Abstract In this paper, asphalt binder was blended with 0%, 4%, 6%, and 8% Amorphous poly alpha olefins (APAO) to prepare modified asphalt binders. Based on the penetration, ductility, softening point, and Dynamic Shear Rheometer (DSR) test, 6% APAO was the optimal dosage in asphalt binder performance perspective. The dense graded aggregate was mixed with APAO modified asphalt binder to prepare the APAO modified asphalt mixture. The volumetric parameters of the asphalt mixture with APAO modified asphalt binder was tested. The standard Marshall stability test, immersion Marshall test, Freeze-thaw splitting test, and Marshall stability of aged asphalt mixtures test were conducted on asphalt mixtures with APAO modified asphalt binder. Based on the Marshall stability test, immersion Marshall test, and Freeze-thaw splitting test, asphalt mixture with 6% APAO possessed the best high temperature performance, the highest moisture damage resistance, and the least splitting tensile strength loss after the freeze-thaw conditions. The tensile strength decreased after the addition of APAO. There was only negligible tensile strength difference between asphalt mixture with 4% APAO and 6% APAO. Based on the Marshall stability and retained Marshall stability ratio (RMSR) of asphalt mixtures after aging, the optimal content of APAO was 6%. Therefore, 6% APAO was the optimal content for both modified asphalt binder and APAO modified asphalt mixture.

  • effects of sasobit deurex on amorphous poly alpha olefin apao modified asphalt binder
    Construction and Building Materials, 2017
    Co-Authors: Xiaowen Zhao, Kezhen Yan, Cong Cai
    Abstract:

    Abstract The purpose of this study aims at investigating the effect of warm-mix additive Sasobit/Deurex on properties of APAO modified asphalt binder (AMB). The physical properties were measured through penetration, softening point and ductility tests. Besides, rotational viscosity (RV), dynamic shear rheometer (DSR) and bending beam rheometer (BBR) test were utilized to determine the rheological characteristics of warm-mix asphalt binders before and after aging. Fourier transform infrared spectroscopy (FTIR) test was used to describe the chemical characteristics of Sasobit/Deurex warm-mixed APAO modified asphalt binder (AMB). The results showed that incorporation of Sasobit/Deurex into AMB could effectively reduce the viscosity and exert a distinct modification on high temperature performance of asphalt binders in terms of reduced penetration, increased softening point and decreased ductility. Dynamic shear rheometer (DSR) test showed that warm-mix asphalt had bigger complex modulus and smaller phase angle than blank AMB. Bending beam rheometer (BBR) test indicated that minor addition of Deurex (2%) have improved the low temperature rheological performance of AMB while Sasobit had negative effect on it. Moreover, the FTIR analysis showed that chemical reactions might happen during the mixing of Sasobit/Deurex with AMB. In overall consideration, 4% Sasobit and 2% Deurex were optimal dosages for the AMB in this experiment concerning the rheological characteristics, construction workability and economic benefits.

  • Effects of Sasobit/Deurex on amorphous poly alpha olefin (APAO) modified asphalt binder
    Construction and Building Materials, 2017
    Co-Authors: Xiaowen Zhao, Kezhen Yan, Cong Cai
    Abstract:

    Abstract The purpose of this study aims at investigating the effect of warm-mix additive Sasobit/Deurex on properties of APAO modified asphalt binder (AMB). The physical properties were measured through penetration, softening point and ductility tests. Besides, rotational viscosity (RV), dynamic shear rheometer (DSR) and bending beam rheometer (BBR) test were utilized to determine the rheological characteristics of warm-mix asphalt binders before and after aging. Fourier transform infrared spectroscopy (FTIR) test was used to describe the chemical characteristics of Sasobit/Deurex warm-mixed APAO modified asphalt binder (AMB). The results showed that incorporation of Sasobit/Deurex into AMB could effectively reduce the viscosity and exert a distinct modification on high temperature performance of asphalt binders in terms of reduced penetration, increased softening point and decreased ductility. Dynamic shear rheometer (DSR) test showed that warm-mix asphalt had bigger complex modulus and smaller phase angle than blank AMB. Bending beam rheometer (BBR) test indicated that minor addition of Deurex (2%) have improved the low temperature rheological performance of AMB while Sasobit had negative effect on it. Moreover, the FTIR analysis showed that chemical reactions might happen during the mixing of Sasobit/Deurex with AMB. In overall consideration, 4% Sasobit and 2% Deurex were optimal dosages for the AMB in this experiment concerning the rheological characteristics, construction workability and economic benefits.

Kezhen Yan - One of the best experts on this subject based on the ideXlab platform.

  • Laboratory Research on the Properties of Warm Amorphous Poly Alpha Olefin–Modified Asphalt Mixture Using Sasobit and Deurex
    Journal of Materials in Civil Engineering, 2018
    Co-Authors: Xiaowen Zhao, Kezhen Yan, Shu Yang, Hanyu Peng
    Abstract:

    AbstractThe purpose of this study was to investigate the effects of warm mix additive Sasobit and Deurex on the properties of amorphous poly alpha olefin (APAO) modified asphalt (AMB) mixture. Mars...

  • The laboratory performance of asphalt mixture with Amorphous poly alpha olefins (APAO) modified asphalt binder
    Construction and Building Materials, 2018
    Co-Authors: Kezhen Yan, Xiaowen Zhao
    Abstract:

    Abstract In this paper, asphalt binder was blended with 0%, 4%, 6%, and 8% Amorphous poly alpha olefins (APAO) to prepare modified asphalt binders. Based on the penetration, ductility, softening point, and Dynamic Shear Rheometer (DSR) test, 6% APAO was the optimal dosage in asphalt binder performance perspective. The dense graded aggregate was mixed with APAO modified asphalt binder to prepare the APAO modified asphalt mixture. The volumetric parameters of the asphalt mixture with APAO modified asphalt binder was tested. The standard Marshall stability test, immersion Marshall test, Freeze-thaw splitting test, and Marshall stability of aged asphalt mixtures test were conducted on asphalt mixtures with APAO modified asphalt binder. Based on the Marshall stability test, immersion Marshall test, and Freeze-thaw splitting test, asphalt mixture with 6% APAO possessed the best high temperature performance, the highest moisture damage resistance, and the least splitting tensile strength loss after the freeze-thaw conditions. The tensile strength decreased after the addition of APAO. There was only negligible tensile strength difference between asphalt mixture with 4% APAO and 6% APAO. Based on the Marshall stability and retained Marshall stability ratio (RMSR) of asphalt mixtures after aging, the optimal content of APAO was 6%. Therefore, 6% APAO was the optimal content for both modified asphalt binder and APAO modified asphalt mixture.

  • effects of sasobit deurex on amorphous poly alpha olefin apao modified asphalt binder
    Construction and Building Materials, 2017
    Co-Authors: Xiaowen Zhao, Kezhen Yan, Cong Cai
    Abstract:

    Abstract The purpose of this study aims at investigating the effect of warm-mix additive Sasobit/Deurex on properties of APAO modified asphalt binder (AMB). The physical properties were measured through penetration, softening point and ductility tests. Besides, rotational viscosity (RV), dynamic shear rheometer (DSR) and bending beam rheometer (BBR) test were utilized to determine the rheological characteristics of warm-mix asphalt binders before and after aging. Fourier transform infrared spectroscopy (FTIR) test was used to describe the chemical characteristics of Sasobit/Deurex warm-mixed APAO modified asphalt binder (AMB). The results showed that incorporation of Sasobit/Deurex into AMB could effectively reduce the viscosity and exert a distinct modification on high temperature performance of asphalt binders in terms of reduced penetration, increased softening point and decreased ductility. Dynamic shear rheometer (DSR) test showed that warm-mix asphalt had bigger complex modulus and smaller phase angle than blank AMB. Bending beam rheometer (BBR) test indicated that minor addition of Deurex (2%) have improved the low temperature rheological performance of AMB while Sasobit had negative effect on it. Moreover, the FTIR analysis showed that chemical reactions might happen during the mixing of Sasobit/Deurex with AMB. In overall consideration, 4% Sasobit and 2% Deurex were optimal dosages for the AMB in this experiment concerning the rheological characteristics, construction workability and economic benefits.

  • Effects of Sasobit/Deurex on amorphous poly alpha olefin (APAO) modified asphalt binder
    Construction and Building Materials, 2017
    Co-Authors: Xiaowen Zhao, Kezhen Yan, Cong Cai
    Abstract:

    Abstract The purpose of this study aims at investigating the effect of warm-mix additive Sasobit/Deurex on properties of APAO modified asphalt binder (AMB). The physical properties were measured through penetration, softening point and ductility tests. Besides, rotational viscosity (RV), dynamic shear rheometer (DSR) and bending beam rheometer (BBR) test were utilized to determine the rheological characteristics of warm-mix asphalt binders before and after aging. Fourier transform infrared spectroscopy (FTIR) test was used to describe the chemical characteristics of Sasobit/Deurex warm-mixed APAO modified asphalt binder (AMB). The results showed that incorporation of Sasobit/Deurex into AMB could effectively reduce the viscosity and exert a distinct modification on high temperature performance of asphalt binders in terms of reduced penetration, increased softening point and decreased ductility. Dynamic shear rheometer (DSR) test showed that warm-mix asphalt had bigger complex modulus and smaller phase angle than blank AMB. Bending beam rheometer (BBR) test indicated that minor addition of Deurex (2%) have improved the low temperature rheological performance of AMB while Sasobit had negative effect on it. Moreover, the FTIR analysis showed that chemical reactions might happen during the mixing of Sasobit/Deurex with AMB. In overall consideration, 4% Sasobit and 2% Deurex were optimal dosages for the AMB in this experiment concerning the rheological characteristics, construction workability and economic benefits.

  • Laboratory investigation of waste tire rubber and amorphous poly alpha olefin modified asphalt
    Construction and Building Materials, 2016
    Co-Authors: Kezhen Yan, Ming Chen, Wenyao Liu
    Abstract:

    Abstract In recent years, waste tire rubber (WTR) has been widely used as an asphalt modifier, due to its good interaction with asphalt particles. Another modifier, amorphous poly alpha olefin (APAO) also gains popular interest from researchers because of its excellent miscibility with rubber, asphalt, and its remarkable aging resistance. This study aims at investigating the compound modification effect of WTR/APAO on the properties of asphalt binders. Their rheological features were measured through conventional and dynamic shear tests; low temperature performance was investigated by bending beam rheometer test; mixture stability was measured by storage stability test. The result of decreased penetration, increased softening point, elastic recovery, viscosity and complex modulus indicates that WTR/APAO compound modification improves the high temperature performance and rutting resistance of asphalt binders. Moreover the binders with additional incorporation of APAO obviously performed better than those modified with WTR alone, especially in storage stability. However, the modification effect of WTR and APAO on low temperature rheological properties of asphalt is unclear and controversial, as both creep stiffness and m-value decreased in the BBR test.

Yuzhen Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Study on the amorphous poly alpha olefin (APAO) modified asphalt binders
    Construction and Building Materials, 2014
    Co-Authors: Jianming Wei, Fuqiang Dong, Hu Feng, Yuzhen Zhang
    Abstract:

    Abstract This paper investigated the influence of amorphous poly alpha olefin (APAO) on the properties of modified asphalt binders. Two types of APAOs with different viscosities were selected. The penetration, softening point, ductility, elastic recovery, viscosity, storage stability, short-term aging, fluorescent microscope, and Fourier transform infrared (FTIR) spectrum tests of asphalt samples were carried out in the study. It is found that APAO improves the high-temperature performance and reduced the temperature susceptibility of the modified asphalt binder. The storage stability of APAO modified asphalt is dependent on the APAO loading level. And the addition of APAO into base asphalt improves the short-term aging characteristics. The micrograph indicates low loading level of APAO has good dispersion in the asphalt binder. And FTIR result presents that the mixing of APAO and base asphalt do not have any chemical reaction. However, APAO has negative effect on the low-temperature performance of modified asphalt binder. It is recommended that more work is needed to explore this issue.

  • Rheological properties of amorphous poly alpha olefin (APAO) modified asphalt binders
    Construction and Building Materials, 2013
    Co-Authors: Jianming Wei, Zhangyong Liu, Yuzhen Zhang
    Abstract:

    Abstract The rheological properties of amorphous poly alpha olefin (APAO) modified asphalt binders were investigated through rotational viscometer (RV), dynamic shear rheometer (DSR), and bending beam rheometer (BBR) tests in the laboratory. Two types of APAOs and four percentages of APAO were selected in the study. RV results indicate that the addition of APAO increases the viscosity of modified asphalt binder at high temperatures. DSR measurements show that the elastic property of asphalt binder is enhanced and the failure temperature is improved due to the addition of APAO. In addition, BBR results demonstrate that additional APAO has negative effects on the creep stiffness and creep rate of the modified asphalt binders. The temperature susceptibility of asphalt binder is reduced at high, intermediate, and low temperature zones after adding APAO. Moreover, this study found that APAO K3050 has better modification than K3020 due to its higher viscosity.

Cong Cai - One of the best experts on this subject based on the ideXlab platform.

  • effects of sasobit deurex on amorphous poly alpha olefin apao modified asphalt binder
    Construction and Building Materials, 2017
    Co-Authors: Xiaowen Zhao, Kezhen Yan, Cong Cai
    Abstract:

    Abstract The purpose of this study aims at investigating the effect of warm-mix additive Sasobit/Deurex on properties of APAO modified asphalt binder (AMB). The physical properties were measured through penetration, softening point and ductility tests. Besides, rotational viscosity (RV), dynamic shear rheometer (DSR) and bending beam rheometer (BBR) test were utilized to determine the rheological characteristics of warm-mix asphalt binders before and after aging. Fourier transform infrared spectroscopy (FTIR) test was used to describe the chemical characteristics of Sasobit/Deurex warm-mixed APAO modified asphalt binder (AMB). The results showed that incorporation of Sasobit/Deurex into AMB could effectively reduce the viscosity and exert a distinct modification on high temperature performance of asphalt binders in terms of reduced penetration, increased softening point and decreased ductility. Dynamic shear rheometer (DSR) test showed that warm-mix asphalt had bigger complex modulus and smaller phase angle than blank AMB. Bending beam rheometer (BBR) test indicated that minor addition of Deurex (2%) have improved the low temperature rheological performance of AMB while Sasobit had negative effect on it. Moreover, the FTIR analysis showed that chemical reactions might happen during the mixing of Sasobit/Deurex with AMB. In overall consideration, 4% Sasobit and 2% Deurex were optimal dosages for the AMB in this experiment concerning the rheological characteristics, construction workability and economic benefits.

  • Effects of Sasobit/Deurex on amorphous poly alpha olefin (APAO) modified asphalt binder
    Construction and Building Materials, 2017
    Co-Authors: Xiaowen Zhao, Kezhen Yan, Cong Cai
    Abstract:

    Abstract The purpose of this study aims at investigating the effect of warm-mix additive Sasobit/Deurex on properties of APAO modified asphalt binder (AMB). The physical properties were measured through penetration, softening point and ductility tests. Besides, rotational viscosity (RV), dynamic shear rheometer (DSR) and bending beam rheometer (BBR) test were utilized to determine the rheological characteristics of warm-mix asphalt binders before and after aging. Fourier transform infrared spectroscopy (FTIR) test was used to describe the chemical characteristics of Sasobit/Deurex warm-mixed APAO modified asphalt binder (AMB). The results showed that incorporation of Sasobit/Deurex into AMB could effectively reduce the viscosity and exert a distinct modification on high temperature performance of asphalt binders in terms of reduced penetration, increased softening point and decreased ductility. Dynamic shear rheometer (DSR) test showed that warm-mix asphalt had bigger complex modulus and smaller phase angle than blank AMB. Bending beam rheometer (BBR) test indicated that minor addition of Deurex (2%) have improved the low temperature rheological performance of AMB while Sasobit had negative effect on it. Moreover, the FTIR analysis showed that chemical reactions might happen during the mixing of Sasobit/Deurex with AMB. In overall consideration, 4% Sasobit and 2% Deurex were optimal dosages for the AMB in this experiment concerning the rheological characteristics, construction workability and economic benefits.

Jianming Wei - One of the best experts on this subject based on the ideXlab platform.

  • Study on the amorphous poly alpha olefin (APAO) modified asphalt binders
    Construction and Building Materials, 2014
    Co-Authors: Jianming Wei, Fuqiang Dong, Hu Feng, Yuzhen Zhang
    Abstract:

    Abstract This paper investigated the influence of amorphous poly alpha olefin (APAO) on the properties of modified asphalt binders. Two types of APAOs with different viscosities were selected. The penetration, softening point, ductility, elastic recovery, viscosity, storage stability, short-term aging, fluorescent microscope, and Fourier transform infrared (FTIR) spectrum tests of asphalt samples were carried out in the study. It is found that APAO improves the high-temperature performance and reduced the temperature susceptibility of the modified asphalt binder. The storage stability of APAO modified asphalt is dependent on the APAO loading level. And the addition of APAO into base asphalt improves the short-term aging characteristics. The micrograph indicates low loading level of APAO has good dispersion in the asphalt binder. And FTIR result presents that the mixing of APAO and base asphalt do not have any chemical reaction. However, APAO has negative effect on the low-temperature performance of modified asphalt binder. It is recommended that more work is needed to explore this issue.

  • Rheological properties of amorphous poly alpha olefin (APAO) modified asphalt binders
    Construction and Building Materials, 2013
    Co-Authors: Jianming Wei, Zhangyong Liu, Yuzhen Zhang
    Abstract:

    Abstract The rheological properties of amorphous poly alpha olefin (APAO) modified asphalt binders were investigated through rotational viscometer (RV), dynamic shear rheometer (DSR), and bending beam rheometer (BBR) tests in the laboratory. Two types of APAOs and four percentages of APAO were selected in the study. RV results indicate that the addition of APAO increases the viscosity of modified asphalt binder at high temperatures. DSR measurements show that the elastic property of asphalt binder is enhanced and the failure temperature is improved due to the addition of APAO. In addition, BBR results demonstrate that additional APAO has negative effects on the creep stiffness and creep rate of the modified asphalt binders. The temperature susceptibility of asphalt binder is reduced at high, intermediate, and low temperature zones after adding APAO. Moreover, this study found that APAO K3050 has better modification than K3020 due to its higher viscosity.