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  • Open Access


    Effects of Filler-Asphalt Ratio on the Properties of Lignin and Polyester Fiber Reinforced SMPU/SBS Modified Asphalt Mortar

    Wenjing Xia1,*, JinHui Wang1, Tao Xu1, Nan Jiang2

    Journal of Renewable Materials, Vol.11, No.8, pp. 3387-3402, 2023, DOI:10.32604/jrm.2023.026971

    Abstract To understand the effects of filler-asphalt ratio on different properties of lignin and polyester fiber reinforced shape memory polyurethane (SMPU)/styrene butadiene styrene (SBS) composite modified asphalt mortar (PSAM), as well as to reveal the reinforcing and toughening mechanisms of lignin and polyester fibers on PSAM, SMPU, SBS and mineral powder were first utilized to prepare PSAM. Then the conventional, rheological and anticracking properties of lignin fiber reinforced PSAM (LFAM) and polyester fiber reinforced PSAM (PFAM) at different filler-asphalt ratios were characterized. Test results indicate that the shear strength, deformation resistance and viscosity are increased after adding 0.8wt% lignin fiber or… More > Graphic Abstract

    Effects of Filler-Asphalt Ratio on the Properties of Lignin and Polyester Fiber Reinforced SMPU/SBS Modified Asphalt Mortar

  • Open Access


    Effect of Oils on SBS Modified Asphalt: Rheological Characteristics and Oxidation Aging

    Jing Xu1,2,*, Yuquan Yao3, Kai Zhang1, Jiangang Yang2, Jie Gao2, Jian Zhou2

    Journal of Renewable Materials, Vol.11, No.3, pp. 1339-1351, 2023, DOI:10.32604/jrm.2022.023270

    Abstract This study focuses on the effect of oils on rheology and oxidation aging of Styrene-Butadiene-Styrene modified asphalt (SBSMA) in the long term, after reducing one low-temperature Performance Grade (PG) of SBSMA by incorporating oils. Two oils, including corn-based bio-oil and re-refined engine oil bottom (REOB), were selected to enhance the low-temperature performance of SBSMA. All samples were subjected to Rolling Thin Film Oven (RTFO) aging and 20-h as well as 40-h Pressure Aging Vessel (PAV20 and PAV40) aging, prior to multiple stress creep recovery (MSCR), frequency sweep and Flourier transform infrared spectroscopy (FTIR) scanning. A good high-temperature performance of oil/SBS… More >

  • Open Access


    Analysis of Highway Asphalt Modified with Recycled Rubber and Waste Plastics

    Aimin Zhang, Mingzhi Lu*

    FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.4, pp. 907-918, 2022, DOI:10.32604/fdmp.2022.018995

    Abstract In this study, it is shown how recycled rubber and waste plastics can modify the softening point and penetration of asphalt traditionally used for highways. It is shown that the modified asphalt can meet the performance index requirements when the components are present with a certain proportion or relative ratio (1:3.5). The dispersion process of the masterbatch in base asphalt can effectively be implemented, with good results and a smaller mixing time. The proposed approach may be regarded as a good strategy to achieve energy savings and protection of the environment. More >

  • Open Access


    Laboratory Study on CR/SBS Modified Asphalt: Preparation and Performance Characterization

    Liang Song1,2,3, Guoqiang Zhang2, Hongfei Xie2, Jie Gao4,*

    Journal of Renewable Materials, Vol.10, No.6, pp. 1659-1674, 2022, DOI:10.32604/jrm.2022.018335

    Abstract Crumble rubber (CR) can be used to prepare CR and styrene-butadiene-styrene (SBS) composite modified asphalt with a good high-and low-temperature performance, meanwhile the addition of CR could work as the substitute for SBS and help reduce the content of SBS. This study contains three main parts: effect of preparation and effect of material composition as well as rheological performance characterization. Factors during the preparation, including shearing temperature, shearing time, mixing time and swelling time, were selected, while base binder, CR content, CR particle size and SBS content in material composition were considered. The effects of these factors were assessed in… More >

  • Open Access


    Laboratory Evaluation of Fiber-Modified Asphalt Mixtures Incorporating Steel Slag Aggregates

    Adham Mohammed Alnadish1,*, Mohamad Yusri Aman1, Herda Yati Binti Katman2, Mohd Rasdan Ibrahim3

    CMC-Computers, Materials & Continua, Vol.70, No.3, pp. 5967-5990, 2022, DOI:10.32604/cmc.2022.017387

    Abstract Vigorous and continued efforts by researchers and engineers have contributed towards maintaining environmental sustainability through the utilization of waste materials in civil engineering applications as an alternative to natural sources. In this study, granite aggregates in asphaltic mixes were replaced by electric arc furnace (EAF) steel slag aggregates with different proportions to identify the best combination in terms of superior performance. Asphalt mixtures showing the best performance were further reinforced with polyvinyl alcohol (PVA), acrylic, and polyester fibers at the dosages of 0.05%, 0.15%, and 0.3% by weight of the aggregates. The performance tests of this study were resilient modulus,… More >

  • Open Access


    Analysis of the Mechanism and Effectiveness of Lignin in Improving the High-Temperature Thermal Stability of Asphalt

    Cheng Cheng1,2,*, Weiwei Sun2, Bo Hu3, Guixiang Tao2, Chao Peng2, Yanjuan Tian4, Shujuan Wu4,5

    Journal of Renewable Materials, Vol.8, No.10, pp. 1243-1255, 2020, DOI:10.32604/jrm.2020.012054

    Abstract The use of lignin, which is a by-product of the pulp and paper industry, in the development of asphalt binders would contribute to waste reduction, providing environmental, economic, and social benefits. In this study, samples of lignin-modified asphalt binder samples with different content of lignin (3%, 6%, 9%, 12%, and 15%) and unmodified asphalt (control) were tested using Fourier transform infrared spectroscopy (FTIR), dynamic shear rheometer (DSR), and thermogravimetry. The mechanism and effectiveness of lignin in improving the thermal stability of asphalt at high temperatures were analyzed. The FTIR analysis shows that no new characteristic absorption peak is seen in… More >

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