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  • Open Access


    On the Use of Recycled Asphalt and Trinidad Lake Asphalt (TLA) for the Preparation of High Modulus Asphalt Concrete

    Chao Li1,*, Guodong Zeng1, Yang Fang1, Hongming Huang2

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.7, pp. 1939-1950, 2023, DOI:10.32604/fdmp.2023.026103

    Abstract Rutting of asphalt pavement occurs earlier and is more serious under the increasingly heavy traffic load conditions that can be found in subtropical monsoon climate regions. High modulus asphalt concrete (HMAC) with excellent anti-rutting and anti-fatigue properties is generally used to mitigate this issue. Given the relatively high cost of the additives used in this type of asphalt, in this study the feasibility of using recycled asphalt mixture (RAP) and Trinidad lake asphalt (TLA) for the preparation of HMAC is considered. The mineral composition of the RAP is first analyzed, then the TLA modified asphalt with different levels of RAP… More >

  • Open Access


    Influence of Hydrodynamic Pore Pressure Damage on the Performance of Hot-Mixed Renewable Asphalt Mixture

    Guodong Zeng1, Chao Li1,*, Yang Fang1, Hongming Huang1,2, Hao Li1,3, Yishen Xu1

    Journal of Renewable Materials, Vol.11, No.5, pp. 2453-2467, 2023, DOI:10.32604/jrm.2023.025871

    Abstract For evaluating the water stability of hot-mixed renewable asphalt mixture (HRM), the traditional methods are all tested under still water conditions. Except for damage in still water conditions, the hydrodynamic pore pressure generated by the tire driving on the surface water has a great impact. Thus, the RAP contents of the HRMs were designed at 0%, 30%, 45% and 60% with AC-25 gradation. Then, the self-designed evaluation methods of water stability and dynamic modulus were studied. Finally, the mechanism of the influence of hydrodynamic pore pressure damage on HRMs was studied. The results show that the water stability of HRM… 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


    High-Temperature Deformation and Low-Temperature Fracture Behavior of Steel Slag Rubber Asphalt Mixture Surface Layer

    Zhiqiang Shu1, Jianmin Wu1,*, Shi Chen2, Shan Yi2, Shaoqing Li1

    Journal of Renewable Materials, Vol.10, No.2, pp. 453-467, 2022, DOI:10.32604/jrm.2022.016828

    Abstract Steel slag is regarded as one of the most widespread solid by-products of steel smelting with little commercial value. It can play a vital role in the construction industry especially in the field of transportation infrastructure construction. However, there are few evaluation systems established on the high-temperature deformation and low-temperature fracture behavior of steel slag rubber asphalt mixture (SSRAM). This study explores the performance of SSRAM by uniaxial penetration test, Semi-Circular Bending (SCB) test and evaluates test data through regression analysis. The uniaxial penetration test results shows that the failure deformation of SSRAM increases with the increase of steel slag… More >

  • Open Access


    Effect of Encapsulation Combined with Microwave Heating on Self-Healing Performance of Asphalt Mixture

    Benan Shu1,*, Lixian Guo1, Bing Qiu1, Tengyu Yang1, Tao Sun1, Wenjun Qiu1, Min Zhou1, Putao Song2, Yuanyuan Li3, Diego Maria Barbieri4, Shaopeng Wu5,*

    Journal of Renewable Materials, Vol.9, No.10, pp. 1781-1794, 2021, DOI:10.32604/jrm.2021.015659

    Abstract As an innovative maintenance technology of asphalt pavement, encapsulated rejuvenator used to improve its self-healing performance has been widely investigated by researchers in recent years. In this work, the selfhealing properties of asphalt mixture with and without encapsulations were comparatively studied considering these parameters: Healing time, healing cycles and microwave heating. Three-point bending strength recovery test and fatigue loading cycles recovery test were conducted for two kinds of encapsulations containing the healing agents present inside the asphalt mixture, namely compartmented Ca-alginate/SiO2 fiber and compartmented Ca-alginate/graphene oxide fiber. The results showed that the optimum healing time was three days. After the… More >

  • Open Access


    Road Performance, Thermal Conductivity, and Temperature Distribution of Steel Slag Rubber Asphalt Surface Layer

    Zhiqiang Shu, Jianmin Wu*, Shaoqing Li, Bingbing Zhang, Jianqi Yang

    Journal of Renewable Materials, Vol.9, No.2, pp. 365-380, 2021, DOI:10.32604/jrm.2021.014379

    Abstract The use of steel slag, which is a by-product of the steel manufacture, in the construction of asphalt pavement would contribute to waste reduction and environment protection. Using rubber asphalt at the same time can improve the performance of asphalt mixture. This study investigates the influence of steel slag content on the road performance, thermal conductivity and outdoor temperature distribution of steel slag rubber asphalt mixtures (SSRAM), and calculates the cumulative stress in surface layer. At a certain range of concentration, the steel slag additive improved the deformation resistance and low-temperature cracking resistance of the mixtures. The SSRAM with 40%… More >

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