Article
Engineering, Mechanical
Qiang Li, Yuanpeng Meng, Nianhe Li, Guofen Li, Jiaqing Wang
Summary: Different warm-mix recycled asphalt mixtures were evaluated for fatigue performance using the SCB test. The use of WMA technology reduces fatigue performance, but this effect can be offset by adding SBR latex. Increasing RAP content or ageing time significantly decreases fatigue life, and the dissipated energy model can predict fatigue lives for various warm-mix recycled asphalt mixtures.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Construction & Building Technology
Martin Hugener, Di Wang, Augusto Cannone Falchetto, Laurent Porot, Patricia Kara De Maeijer, Marko Oreskovic, Margarida Sa-da-Costa, Hassan Tabatabaee, Edoardo Bocci, Atsushi Kawakami, Bernhard Hofko, Andrea Grilli, Emiliano Pasquini, Marco Pasetto, Huachun Zhai, Hilde Soenen, Wim Van den Bergh, Fabrizio Cardone, Alan Carter, Kamilla Vasconcelos, Xavier Carbonneau, Aurelie Lorserie, Goran Mladenovic, Tomas Koudelka, Pavel Coufalik, Runhua Zhang, Eshan Dave, Gabriele Tebaldi
Summary: This study, organised by the RILEM technical committee, evaluated the effect of asphalt recycling agent (ARA) on the binder properties of recycled asphalt mixture. The results highlighted the importance of using a dynamic shear rheometer to evaluate binder blends containing ARA. The study recommended restoring the original material properties while balancing high-temperature characteristics and cracking resistance.
MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Xingren Zhou, Weimin Song, Hao Wu
Summary: In this study, fatigue tests were conducted using a novel load-controlled mode to evaluate the effect of reclaimed asphalt pavement (RAP) on the fatigue performance of hot-mix asphalt (HMA). Results showed that the addition of 25% RAP prolongs the fatigue life at 25 degrees C, while the addition of 50% RAP reduces the fatigue life. However, at -10 degrees C, both 25% and 50% RAP have a negative effect on the fatigue life.
Article
Green & Sustainable Science & Technology
Qiang Li, Guangxu Sun, Yang Lu, Yuanpeng Meng, Sang Luo, Lei Gao
Summary: The study evaluates the performance of recycled asphalt binders prepared using warm-mix recycling technology in terms of linear viscoelasticity, rutting resistance, fatigue resistance, and low-temperature crack resistance. Different warm mix asphalt (WMA) technologies and modifiers have significant effects on the performance of recycled binders. The addition of crumb rubber powder (CRP) in warm-mix recycled binders shows the best comprehensive performance, and suitable modifiers are recommended to compensate for the loss of pavement performance caused by the use of WMA technologies and RAP.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Alexandros Margaritis, Georgios Pipintakos, Aikaterini Varveri, Geert Jacobs, Navid Hasheminejad, Johan Blom, Wim Van den Bergh
Summary: Fatigue resistance is crucial for bituminous materials selection. This study introduces a new testing framework to evaluate the fatigue resistance of bituminous mortars, using a new test geometry and dynamic shear rheometer tests. The analysis shows good convergence with fatigue models and a consistent fatigue model independent of binder type and test conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Construction & Building Technology
Mayank Sukhija, Nikhil Saboo
Summary: Warm mix asphalt (WMA) can be prepared and compacted at reduced temperatures using different warm mix technologies, offering unique environmental and economic benefits. Various laboratory and field investigations have been conducted to assess the mechanical performance of WMA. The main objective of this review is to gather information on various aspects of WMA mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Pejoohan Tavassoti, Mansour Solaimanian, Xuan Chen
Summary: Cold recycling of pavements uses reclaimed asphalt pavement (RAP) for pavement rehabilitation. This study assessed the fatigue performance of three different cold recycled asphalt mixes, and found that adding 1% Portland cement significantly improved their fatigue resistance. The study also demonstrated the potential of using polymer modified emulsion to enhance the rutting resistance of the mixes.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Mechanics
Yiqun Zhan, Hao Wu, Weimin Song, Shidong Xu, Yao Luo, Fei He
Summary: This study presents a new method for evaluating the fracture resistance of HMA under monotonic and fatigue loading at low and intermediate temperatures. The dissipated energy in the monotonic loading test is divided into plastic strain energy, elastic strain energy, and surface energy. The fatigue loading test analyzes the fracture behavior of HMA using parameters such as fatigue life, dissipated energy, cumulative dissipated energy, and damage factor. The results showed that lower temperatures and deeper notches can induce earlier crack initiation, and the energy absorption behavior changes with temperature.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Construction & Building Technology
Farah Zaremotekhases, Husam Sadek, Marwa Hassan, Charles Berryman
Summary: This study examined the mechanical performance of asphalt mixtures containing RAP using various WMA technologies, concluding that WMA mixtures with 35% RAP exhibit enhanced resistance against permanent deformations and improved cracking performance. The incorporation of higher percentages of RAP and WMA technologies contributed to better cracking resistance and fatigue life of the WMA-RAP mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Mohammad Javad Amirkhani, Mansour Fakhri, Abdollah Amirkhani
Summary: The aim of this study was to evaluate the impact of different fillers on the performance of WMA with Kaowax additive. The results showed that the presence of Kaowax increased the resilient modulus and rutting strength of the asphalt mix. WMA samples containing fly ash filler had good moisture susceptibility, while the use of cement filler improved rutting resistance. The calcium carbonate filler enhanced the performance of WMA mixtures at all temperatures.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Multidisciplinary Sciences
Miguel A. Franesqui, Ana Maria Rodriguez-Alloza, Jorge Yepes, Candida Garcia-Gonzalez
Summary: This study investigates the performance and production properties of asphalt mixtures with waste crumb-rubber modifier, warm mix asphalt surfactant additive, and residual poor-quality volcanic aggregates. The research shows that by combining these cleaner technologies, it is possible to reuse two different types of waste and decrease the manufacturing temperature, resulting in more sustainable materials. The results indicate that the rubberized warm asphalt mixtures comply with technical specifications and allow for reductions in energy consumption and emissions.
SCIENTIFIC REPORTS
(2023)
Article
Construction & Building Technology
Taiwo Sesay, Qinglong You, Jian Chuan, Hongliang Qiao, Huiling Zhang, Shuaituan Tian
Summary: In this study, a new chemical surfactant called alube is proposed for producing warm asphalt rubber (WAR) binders, and its suitability and cost-competitiveness are evaluated. The results show that alube can effectively reduce the high temperature viscosity of WAR binders and has lower cost, making it a potential WMA additive for road projects.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Bao Li, Ning Li, Xin Yu, Jianguang Xie, He Zhan, Jian Ding, Hui Ma
Summary: The aging performance and durability of foamed warm mix asphalt (FWMA) have not been fully studied. This study examined and evaluated the performance variation of FWMA compared to conventional hot mix asphalt (HMA) under long-term service conditions. The results showed that the aging resistance of FWMA was slightly diminished under construction conditions with no temperature reduction, but improved at high temperatures and deteriorated at low temperatures with increased service time. The foaming water and service time were primary determinants of the aging and rheological properties of FWMA.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Afshar A. Yousefi, Saeid Sobhi, M. R. M. Aliha, Sadjad Pirmohammad, Hamzeh F. Haghshenas
Summary: The study found that the cracking resistance of WMA mixtures is better than HMA mixtures under different fracture modes, with the addition of RAP impacting the cracking resistance and the inclusion of RA improving the cracking resistance of WMA mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Di Wang, Chiara Riccardi, Babak Jafari, Augusto Cannone Falchetto, Michael P. Wistuba
Summary: This study experimentally investigated the combined use of re-recycled Reclaimed Asphalt Pavement (RAP) with Warm Mix Asphalt (WMA) on performance properties, showing promising results with a 40% RAP and WMA technology combination. Specifically, WMA-2 demonstrated better low temperature properties compared to other mixtures, indicating the feasibility of using re-recycled RAP in mix design with WMA technology.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
