Article
Chemistry, Physical
Tameem Mohammed Hashim, Mohammed Salah Nasr, Yasir Mohammed Jebur, Abdullah Kadhim, Zainab Alkhafaji, Mirza Ghouse Baig, Saheed Kolawole Adekunle, Mohammed A. A. Al-Osta, Shamsad Ahmad, Zaher Mundher Yaseen
Summary: Growing environmental pollution worldwide is mainly caused by the accumulation of liquid and solid waste. Developed countries support waste recycling policies due to their significant impact on the environment. Hot-mix asphalt mixtures (HMA) with reclaimed asphalt pavement (RAP) show excellent performance in resisting rutting. However, using a high percentage of RAP (>25%) poses a challenge due to increased stiffness. This study explores the use of various commercial and noncommercial rejuvenators to address the stiffness issue and optimize the performance of RAP mixtures in different proportions.
Article
Construction & Building Technology
Payman Pirzadeh, Hawraa Kadhim, Daniel L. Grant, Jonathan D. Webb, Hassan Baaj, Pavel Kriz
Summary: Reclaimed Asphalt Pavement (RAP) is a key component in Hot Mix Asphalts (HMA), and the blending between RAP and virgin binders influences the durability and performance of HMA. Research suggests that there is an optimum storage time of 8-12 hours for HMA in silos, during which diffusion between binders approaches completion without significant binder aging, leading to improved resistance to rutting and fatigue cracking.
ROAD MATERIALS AND PAVEMENT DESIGN
(2021)
Article
Construction & Building Technology
Qiulin Wu, Shuyin Wu, Xiaofeng Sun, Xing Su, Jingsong Shan
Summary: Microwave induction technology is used to improve the mobilization of aged asphalt and the blending efficiency of aged and virgin asphalt in recycled asphalt mixtures. Migration test, Fourier transform infrared spectroscopy (FTIR), and surface free energy (SFE) test were used as assessment tools. The study shows that microwave induction enhances the mobilization of RAP binder and the blending efficiency of aged and virgin binders, overcoming the limitations of traditional heating methods.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Construction & Building Technology
V Antunes, A. C. Freire, J. Neves
Summary: The study investigated the homogeneity, performance, and durability of bituminous mixtures with the incorporation of rejuvenated RAP. Experimental protocol for RAP fractioning and rejuvenator addition was established to control the final mixture quality. Heating RAP enhanced the efficiency of aged binder mobilization, leading to good performance in terms of permanent deformation, water sensitivity, stiffness, and fatigue. Mixtures with 25% RAP incorporation demonstrated suitability for use in surface courses, promoting the circular economy.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Gurunath Guduru, Kranthi K. Kuna
Summary: This study proposes a framework to establish allowable limits for RAP content in HMA based on indicative tests on the RAP material. The framework can be adopted by road agencies to develop limits for different mix types. The study uses fragmentation and cohesion tests to classify RAP and proposes allowable limits based on the performance characteristics of Bituminous Concrete with varying amounts of RAP. The results validate the classification approach.
MATERIALS AND STRUCTURES
(2023)
Article
Construction & Building Technology
Amal Abdelaziz, Amy Epps Martin, Edith Arambula Mercado, Timothy Sobieski
Summary: The design of recycled asphalt mixtures needs to consider the activity of recycled binders to avoid the risk of cracking and moisture damage. A comparison of two methods for quantifying recycled binder activity showed that using 100 percent RAP materials is a more promising approach.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Julia A. Rodrigues, Kamilla L. Vasconcelos, Amy Epps Martin, Edith Arambula-Mercado, Eyad Masad
Summary: This study investigates the effect of multiple recycling on binder properties in reclaimed asphalt pavement (RAP) and simulates the aging process of binders in RAP. The results show that the binder can be reused up to three cycles while maintaining good performance, but attention should be given to the cumulative effect of bio-oils.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Wellington L. G. Ferreira, Veronica T. F. Castelo Branco, Kamilla Vasconcelos, Amit Bhasin, Anand Sreeram
Summary: The activation level of binder from reclaimed asphalt pavement (RAP) is critical in designing recycled asphalt mixtures. It is found that RAP binder may not be fully activated, and different aging heterogeneities within RAP binder can affect mixture design. Blending charts for recycled asphalt mixtures should ideally be based on the properties of the active RAP binder to select the correct virgin binder.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Teng Wang, Wei Jiang, Jingjing Xiao, Dedong Guo, Dongdong Yuan, Wangjie Wu, Wentong Wang
Summary: The study found that aged and virgin asphalt cannot be completely blended in the mixing process, and the Degree of Blending (DoB) is generally only 40-60%. The DoB decreases with the increase of asphalt film thickness, but increases with the content of RAP and rejuvenating agent. Additionally, the control of mixing time and temperature is also an important factor affecting the accuracy of DoB.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Review
Engineering, Civil
Zaid Hazim Al-Saffar, Haryati Yaacob, Mohd Khairul Idham Mohd Satar, Mhmood Khleel Saleem, Jau Choy Lai, Ramadhansyah Putra Jaya
Summary: This paper reviews past works using rejuvenating materials with reclaimed asphalt pavement (RAP), discussing their benefits, drawbacks, and the optimal approach to increase RAP content in asphaltic mixtures. Rejuvenating the properties of aged asphalt can improve the performance and behavior of RAP mixtures.
CANADIAN JOURNAL OF CIVIL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Jie Gao, Yuquan Yao, Jiangang Yang, Liang Song, Jing Xu, Liang He, Wenjie Tao
Summary: The production of hot central plant recycling asphalt mixture (RHMA) is more complex and uncertain than conventional hot mix asphalt. An adequate blend of virgin and aged asphalt is essential to recovering the performance of aged asphalt in reclaimed asphalt pavement (RAP).
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Construction & Building Technology
Haobai Zhong, Weidong Huang, Chuanqi Yan, Yuan Zhang, Quan Lv, Lijun Sun, Liyuan Liu
Summary: Hot in-place recycling (HIR) is an effective way to reuse reclaimed asphalt pavement (RAP) by heating the pavement at a high temperature. However, the high heating temperature may cause significant aging on the SBS modified asphalt used in the pavement. This study aims to understand the aging behavior of SBS modified asphalt in HIR projects and provides guidance for future projects.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Green & Sustainable Science & Technology
Saqib Gulzar, Andrew Fried, Jaime Preciado, Cassie Castorena, Shane Underwood, Jhony Habbouche, Ilker Boz
Summary: The use of reclaimed asphalt pavements (RAP) in asphalt mixtures has a long history. Recently, high RAP contents have become common, especially in the US, which significantly affects the behavior and performance of the mixtures. Recycling agents (RA) have been proposed to overcome this challenge by extending the break-even point and providing cost-effectiveness and environmental benefits. However, the scientific knowledge on the selection and use of RAs in asphalt pavements is limited, and there is a need for robust methodologies to establish threshold criteria and performance metrics.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Yuetan Ma, Pawel Polaczyk, Wei Hu, Miaomiao Zhang, Baoshan Huang
Summary: A new method called the ignition oven method was developed to quantify the effective mobilized RAP content during HIR procedures, which has been proven effective and comparable to the FTIR methods. The temperatures and dosage of additives play a critical role in improving the mobilization of RAP and should be optimized for achieving sustainable pavement.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Green & Sustainable Science & Technology
Yifu Meng, Liping Liu, Weiqi Huang, Mingchen Li
Summary: The effect of increasing preheating temperature on the activation and aging of RAP binder was investigated, and an appropriate preheating temperature was determined. The results showed that increasing preheating temperature significantly improved binder activation, but also increased binder aging rate. It is recommended to use the activation-aging index (IAA) as a reference for finding the optimal preheating temperature.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Construction & Building Technology
E. Pasquini, G. Giacomello, M. Pasetto, F. Canestrari
CONSTRUCTION AND BUILDING MATERIALS
(2015)
Article
Construction & Building Technology
Arianna Stimilli, Francesco Canestrari, Pouya Teymourpour, Hussain U. Bahia
CONSTRUCTION AND BUILDING MATERIALS
(2015)
Article
Construction & Building Technology
Edoardo Bocci, Andrea Graziani, Francesco Canestrari
CONSTRUCTION AND BUILDING MATERIALS
(2015)
Article
Engineering, Mechanical
Francesco Canestrari, Amedeo Virgili, Andrea Graziani, Arianna Stimilli
INTERNATIONAL JOURNAL OF FATIGUE
(2015)
Article
Construction & Building Technology
F. Frigio, E. Pasquini, M. N. Partl, F. Canestrari
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2015)
Article
Materials Science, Multidisciplinary
Francesco Canestrari, Arianna Stimilli, Hussain U. Bahia, Amedeo Virgili
MATERIALS & DESIGN
(2015)
Article
Construction & Building Technology
Emiliano Pasquini, Marco Pasetto, Francesco Canestrari
ROAD MATERIALS AND PAVEMENT DESIGN
(2015)
Article
Construction & Building Technology
Francesco Canestrari, Leonello Belogi, Gilda Ferrotti, Andrea Graziani
MATERIALS AND STRUCTURES
(2015)
Proceedings Paper
Engineering, Mechanical
Arianna Stimilli, Amedeo Virgili, Felice Giuliani, Francesco Canestrari
8TH RILEM INTERNATIONAL SYMPOSIUM ON TESTING AND CHARACTERIZATION OF SUSTAINABLE AND INNOVATIVE BITUMINOUS MATERIALS
(2016)
Proceedings Paper
Engineering, Mechanical
Gilda Ferrotti, Antonio D'Andrea, Maciej Maliszewski, Manfred N. Partl, Christiane Raab, Cesare Sangiorgi, Francesco Canestrari
8TH RILEM INTERNATIONAL SYMPOSIUM ON TESTING AND CHARACTERIZATION OF SUSTAINABLE AND INNOVATIVE BITUMINOUS MATERIALS
(2016)