Article
Construction & Building Technology
Daniela L. Vega A., Joao Santos, Gilberto Martinez-Arguelles
Summary: In this study, a comparative life cycle assessment (LCA) was conducted to evaluate the potential environmental impacts of using recycled concrete aggregates (RCAs) as a partial replacement for natural aggregates in Hot Mix Asphalt (HMA) production. The results showed that mixtures with 15% and 30% RCA replacements can be considered environmentally friendly alternatives, while the mixture with 45% RCA replacement has lower environmental performance.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Construction & Building Technology
Tiankai Che, Baofeng Pan, Yudong Li, Dongdong Ge, Dongzhao Jin, Zhanping You
Summary: This study aims to investigate the modification effect of styrene-butadiene rubber (SBR) latex in restoring the original performance of aged asphalt binders. The rheological ability, low-temperature performance, and microscopic characteristics of rejuvenated asphalt binders were evaluated. The results showed that SBR latex improved the rutting resistance of aged asphalt at high temperatures and performed well in enhancing low-temperature cracking resistance and anti-aging performance.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
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.
Review
Construction & Building Technology
Kavitha Karthikeyan, Saravanan Kothandaraman, Goutham Sarang
Summary: In the past decade, there has been an increasing interest in recycling materials from the construction sector due to their environmental benefits. One material that has gained importance is the Reclaimed Asphalt Pavement (RAP) from demolished flexible pavement. RAP has been experimented with as a potential replacement for pristine aggregates in concrete pavements. However, more efforts are needed to improve the strength of RAP-concrete and explore its full potential for sustainable concrete pavements.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Remote Sensing
Reihaneh Samsami, Amlan Mukherjee, Colin N. Brooks
Summary: Temperature segregation in HMA pavement construction can lead to performance problems and requires Quality Assurance inspection procedures. Traditional inspection processes are manual and do not provide a complete temperature profile, endangering inspector safety. This study designs an automated UAS imaging workflow for HMA pavement construction inspection, providing Departments of Transportations and contractors with enhanced remote inspection procedures.
Article
Construction & Building Technology
Yuanyuan Pan, Dongdong Han, Tao Yang, Dong Tang, Yuxia Huang, Ningxing Tang, Yongli Zhao
Summary: The short- and long-term effectiveness of hot in-place recycling (HIR) was evaluated through field measurements and laboratory tests. The results show that HIR with good construction quality effectively restores high-temperature stability and maintains low-temperature performance and moisture susceptibility. The study emphasizes the importance of rejuvenator application, construction control, and longer monitoring of pavement conditions to optimize maintenance decisions.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
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
Engineering, Civil
Eyal Levenberg, Quentin Felix Adam
Summary: This study proposed a method utilizing electric ribbon technology as a heating solution for asphalt pavements, which was demonstrated through full-scale construction of a heated road. By using a special grooving machine to make shallow channels in the asphalt concrete for protecting the ribbon heaters, the system survivability was guaranteed, achieving an overall survivability of 97% and demonstrating practicality and scalability of the installation concept.
TRANSPORTATION RESEARCH RECORD
(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
Yuheng Chen, Zhiguo Chen, Qian Xiang, Weijun Qin, Junyan Yi
Summary: This study investigated the influence of aged asphalt content and RAP content on the properties of asphalt mixtures. The results showed that the addition of aged asphalt made the blended asphalt harder and more elastic but less viscous, improving high-temperature performance while worsening low-temperature performance. On the other hand, the inclusion of RAP improved water stability and high-temperature stability, but decreased low-temperature crack resistance.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Construction & Building Technology
Mingchen Li, Liping Liu, Weiqi Huang, Huayu Wang
Summary: Existing studies have shown that the mixing process of hot recycled asphalt mixture has a significant effect on its performance. The conventional mixing process ignores the asphalt-adsorbing capacity of different aggregates, resulting in heterogeneity of the mixture. This study proposes an improved mixing technique that considers the mixing sequence of materials and determines the amount of asphalt binders added for different RAP content based on the specific surface area of aggregates. Experimental results show that the improved mixing technique enhances the performance of hot recycled asphalt mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Feipeng Xiao, Ling Xu, Zifeng Zhao, Xiangdao Hou
Summary: This paper synthesizes the applications and technologies of reclaimed asphalt pavement in China, covering the historic development, recycling technologies, mix design, and comprehensive performances. It also analyzes the feasibility of multi-cycle repeated recycling and discusses the life-cycle assessment. Furthermore, it introduces the combination of reclaimed asphalt pavement, innovative technologies, advanced materials and equipment.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Construction & Building Technology
Awais Zahid, Sarfraz Ahmed, Muhammad Irfan
Summary: Nanotechnology has gained popularity in asphalt modification and incorporating nanomaterials into Hot Mix Asphalt (HMA) to deal with road failure. Utilizing nanomaterials in HMA can significantly improve performance indicators such as extension in pavement service life and decrease in pavement distresses. The addition of Carbon Nano Tubes (CNT) and Nano Clay (NC) in HMA has shown improvements in dynamic modulus, stability, rut resistance, stiffness, and moisture resistance. The asphalt mixture with 1.5% CNT and 6% NC content performed the best.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
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
Chemistry, Physical
Nicola Fiore, Salvatore Bruno, Giulia Del Serrone, Franco Iacobini, Gabriella Giorgi, Alessandro Rinaldi, Laura Moretti, Gian Marco Duranti, Paolo Peluso, Lorenzo Vita, Antonio D'Andrea
Summary: This study investigated the use of reclaimed asphalt pavement (RAP) and a rejuvenator additive to improve the mechanical properties of hot mix asphalt (HMA) mixtures for railway sub-ballast layer. The results showed that adding RAP and the additive increased the mechanical performances, reduced production costs, and decreased environmental impacts.
Article
Construction & Building Technology
Federico Autelitano, Giulio Maternini, Felice Giuliani
Summary: The use of clear and coloured pavements has been widely encouraged internationally, with the design and visibility being key factors. Studies on the colorimetric and photometric characteristics of coloured pavements have shown the importance of correct mix design, gradual color change over UV exposure time, and the possible conversion of photometric parameters measured with different instruments.
ROAD MATERIALS AND PAVEMENT DESIGN
(2021)
Article
Construction & Building Technology
Erika Garilli, Nazarena Bruno, Federico Autelitano, Riccardo Roncella, Felice Giuliani
Summary: The authors analyzed two supervised classification approaches based on UAV photogrammetry to detect stone pavement's pattern, showing that using a U-Net CNN is an excellent alternative to traditional manual inspection for distress identification. The study suggests that this method can be implemented for different types of stone pavements.
AUTOMATION IN CONSTRUCTION
(2021)
Article
Construction & Building Technology
Erika Garilli, Federico Autelitano, Francesco Freddi, Felice Giuliani
Summary: Urban street pavements, particularly those designed for pedestrians, should prioritize a balance between aesthetic, comfort, and safety. An integrated approach using experimental measurements has been introduced to evaluate the quality of pedestrian paths, focusing on the surface characteristics and the impact on users. Comfort and safety thresholds have been identified for pedestrian street pavement surfaces to assist designers in functional characterization of urban paving solutions.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Review
Construction & Building Technology
Raheb Hafezzadeh, Federico Autelitano, Felice Giuliani
Summary: This article provides a critical comparison between using Cold Mix Patching Materials (CMPMs) and Hot Mix Asphalt (HMA) in repairing potholes, covering various aspects such as repair techniques, productivity, and costs. By investigating the impact of crucial factors on the performance of CMPMs, it is noted that there is a growing worldwide interest in these solutions that initially started as fragmented industrial initiatives.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Federico Autelitano, Sandro Longo, Felice Giuliani
Summary: An innovative anti-icing technology based on hot liquid spray application of a saline hydrogel was developed to customize winter maintenance operations on porous asphalt pavements. This technology allows for filling surface voids, improving deicing effectiveness, and maintaining pavement frictional resistance.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Archaeology
F. Autelitano, N. Bruno, R. Martinelli, V Calvanese, E. Garilli, S. A. Biancardo, G. Dell'Acqua, R. Veropalumbo, A. Zerbi, R. Roncella, F. Giuliani
Summary: A significant excavation is taking place in the Regio V of Pompeii, uncovering a triangular area known as the wedge. The excavation has revealed well-preserved frescoes, dwellings, and balconies, as well as a unique discovery related to pavement engineering. The volcanic eruption in 79 AD preserved the stone pavement construction of a narrow alley, providing valuable evidence of Roman design and construction techniques. This interdisciplinary excavation has utilized various non-destructive techniques to analyze the excavated area, shedding light on the engineering practices of ancient Pompeii.
JOURNAL OF CULTURAL HERITAGE
(2022)
Article
Construction & Building Technology
A. M. Rodriguez-Alloza, F. Giuliani, J. Gallego
Summary: Warm mix asphalt (WMA) and crumb rubber modified asphalt are green technologies for producing environmentally friendly pavement. This study examined the design and manufacturing of dense asphalt mixtures incorporating a crumb-rubber modifier through a wet or dry process and a specific vegetable additive for WMA technologies. The results showed that the mixture can be manufactured and compacted at lower temperatures while maintaining the mechanical properties within specifications when rubber is added through a wet process and a WMA vegetable additive is incorporated.
MATERIALES DE CONSTRUCCION
(2022)
Article
Construction & Building Technology
F. Autelitano, D. Petrolo, L. Chiapponi, F. Giuliani, S. Longo
Summary: Open-graded asphalt pavements require special winter maintenance. A newly developed environmentally friendly salt hydrogel can form a long-lasting gel layer on the pavement, reducing salt consumption. However, this gel layer affects the drainage capacity of the pavement.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Ana Maria Rodriguez-Alloza, Federico Autelitano, Felice Giuliani
Summary: Reclaimed asphalt pavement (RAP) is commonly used in the pavement industry for its environmental and economic benefits. To reuse RAP in new pavements, it must be processed and treated to prevent premature failures. Adding recycling agents, such as rejuvenators, is a widely adopted strategy to slow down the aging of RAP binder. The use of crumb rubber (CR) from end-of-life tires to prepare binders with enhanced properties is also explored. The study focuses on the potential restoration of physical properties of RAP binders containing CR particles (CR-RAP) with the addition of a bio-based recycling agent.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Review
Engineering, Civil
Federico Autelitano, Felice Giuliani
Summary: The use of colored pavements for bicycle facilities provides a clearly delineated route, making the infrastructure more attractive and intuitive, affecting road users' behavior. However, the safety effectiveness seems to be related to specific site features.
JOURNAL OF TRAFFIC AND TRANSPORTATION ENGINEERING-ENGLISH EDITION
(2021)
Article
Construction & Building Technology
Federico Autelitano, Felice Giuliani
Summary: The aim of this study was to determine the ideal replacement rate for artificial EAF aggregates in dense-graded asphalt wearing courses, as well as to identify the most suitable particle size range. The results showed that the best balance between compaction and mechanical performance was achieved with a partial replacement and the introduction of limestone in the coarsest fraction.
INTERNATIONAL JOURNAL OF PAVEMENT RESEARCH AND TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)