Article
Construction & Building Technology
Vivek Pratap Wagh, Mayank Sukhija, Ankit Gupta
Summary: Increased moisture susceptibility is a potential failure for warm-mix asphalt (WMA). Evaluating the bond strength between aggregate and asphalt binder is crucial to understanding the moisture damage mechanism. This study used the Pneumatic Adhesion Test (PAT) to assess the bond between various aggregates and warm mix (WM) modified asphalt binders. The results showed that the bonding relies on factors such as the aggregate type, base binder, and WM additives. The conditioning state (wet or dry) also affects the interfacial bonding.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Van Phuc Le
Summary: This paper evaluates the performance characteristics of asphalt binder modified with sugarcane waste molasses in AC mixtures, finding that SWM modified binder can significantly improve rutting resistance and moisture damage resistance. An optimum SWM content of 10% by base asphalt weight is recommended for use as an alternative to base binder in Hot Mix Asphalt.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Tess Sigwarth, Johannes Buechner, Michael P. Wistuba
Summary: This study focuses on the capability of replacing synthetically refined wax with bio-degradable wax, and finds that it is technically feasible. The study also concludes that bitumen and wax do not contribute to microplastic pollution.
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
Hong -Hu Chu, Abdulaziz Ibrahim Almohana, Ghassan A. QasMarrogy, Sattam Fahad Almojil, Abdulrhman Fahmi Alali, Khaled Twfiq Almoalimi, Amir Raise
Summary: The increase in traffic and changes in weather conditions have led to many distresses in the pavement. Asphalt binder modification is the best way to control these stresses. Meanwhile, utilizing warm mix asphalt additives has significant environmental benefits. This research investigates the influence of using waste materials (ground tire rubber and natural bitumen) on the performance behavior of asphalt binders and mixtures containing warm mix asphalt additive. The results show that the combination of waste materials improves the fatigue and rutting performance, and adding waste natural bitumen decreases the low-temperature behavior of the asphalt binder while adding waste ground tire rubber improves the resistance against low-temperature cracking.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Nathanyawat Sedthayutthaphong, Peerapong Jitsangiam, Hamid Nikraz, Suriyavut Pra-ai, Sarintip Tantanee, Korakod Nusit
Summary: The study investigated the effects of aged asphalt and aged aggregates on the skid resistance of recycled hot mix asphalt, finding that the aggregate gradations controlled the characteristics of the final skid resistance.
Article
Green & Sustainable Science & Technology
Mengyun Zhang, Changjiang Kou, Aihong Kang, Peng Xiao, Haotian Hu
Summary: Understanding the microscopic characteristics of interface transition zones (ITZs) between recycled concrete aggregates (RCAs) and asphalt mastic is crucial for treating RCAs and designing hot mix asphalt. Scanning electron microscopy, nano-indentation, and energy dispersive spectroscopy were conducted to study the micromechanical properties, morphological characteristics, and chemical composition properties of the ITZs samples. The results indicate that incorporating RCAs increases high-temperature stability but decreases low-temperature cracking resistance, water stability, and indirect tensile cracking resistance of SMA. The ITZs between aggregate and residual mortar (ITZs-A-R) has a thickness of 25 micrometers and an average elastic modulus of 24.01 GPa, while the ITZs between residual mortar and asphalt mastic (ITZs-R-A) has a thickness of 26 micrometers and an average elastic modulus of 28.68 GPa.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Emiliano Prosperi, Edoardo Bocci, Maurizio Bocci
Summary: Heavy traffic loads result in the replacement of damaged pavements, leading to a large amount of reclaimed asphalt pavement (RAP) that needs to be recycled. Hot recycling technique is commonly used to reuse RAP. This study focuses on the impact of the origin of virgin bitumen and mixing temperature on the performance of hot recycled mix asphalt (HRMA). The addition of RAP increases the dynamic modulus and decreases the phase angle, and rejuvenators can partially rebalance these characteristics. The origin of bitumen and mixing temperature also affect the properties of the mixture.
Article
Green & Sustainable Science & Technology
Hayder Kamil Shanbara, Anmar Dulaimi, Tariq Al-Mansoori, Shakir Al-Busaltan, Manar Herez, Monower Sadique, Talaat Abdel-Wahed
Summary: Road pavements are crucial for infrastructure, transportation, and economy, but have detrimental effects on the environment. Cold mix asphalt is a low carbon manufacturing method that allows production of flexible pavement material at ambient temperatures, reducing CO2 emissions and saving energy.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
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
Chemistry, Physical
Wanmei Gui, Li Liang, Lan Wang, Fei Zhang
Summary: This study aims to comparatively analyze the low-temperature properties of warm-mixed crumb rubber-modified asphalt binder (W-RAB) using thermal stress and a simple fractional model. The results showed that a combination of recycled rubber and warm-mix additives could slightly improve the thermal crack resistance of the asphalt binder. The addition of 0.6% surfactant yielded the optimum performance.
Article
Green & Sustainable Science & Technology
Hui Xu, Jingyun Chen, Yiren Sun, Xiaoxu Zhu, Weiying Wang, Jiayin Liu
Summary: The study revealed that increasing RAP binder and filler contents stiffen the asphalt mastics, while the two warm-mix additives have different effects on the rheological properties. The wax-based R softens the mastics, offsetting the stiffening effect, while the surfactant-based M has a negligible impact. The differences in working mechanisms between R and M can be clearly characterized through chemical FTIR spectra.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Construction & Building Technology
Rouzbeh Ghabchi, Chamika Prashan Dharmarathna, Maryam Mihandoust
Summary: This study investigates the effects of incorporating different amounts of Micronized PET (MPET) into PG 58-28 asphalt binder on its performance and evaluates the durability of asphalt mixes. The results show that MPET significantly improves viscosity, adhesion, and resistance to cracking, rutting, and moisture-induced damage. The use of MPET as an asphalt binder modifier is an effective method for enhancing mechanical properties of asphalt pavements while addressing environmental concerns and conserving natural resources.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Adham Mohammed Alnadish, Mohamad Yusri Aman, Herda Yati Binti Katman, Mohd Rasdan Ibrahim
Summary: The study shows that producing warm mix asphalt at a temperature 10 degrees C lower than hot mix asphalt yields the best results, while the performance of warm mix asphalt produced at 30 degrees C lower than hot mix asphalt is comparable. As the production temperature increases, the performance of warm mix asphalt improves.
APPLIED SCIENCES-BASEL
(2021)
Article
Construction & Building Technology
Jian Liu, Fangyu Liu, Chuanfeng Zheng, Daodao Zhou, Linbing Wang
Summary: This study explores the use of machine learning models to simplify and accelerate the Superpave mixture design procedure. The model predicts effective and absorbed asphalt content to achieve an automated and timesaving mix design method. The study compares different machine learning algorithms and encoding methods, and finds that the Gradient boosting model performs the best in predicting asphalt content. The proposed method is verified to be consistent with the traditional Superpave method through a case study.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Ignacio Perez, B. Gomez-Meijide, Ana R. Pasandin, Alvaro Garcia, Gordon Airey
Summary: In this study, cold in-place recycling mix with steel fibers was heated by electromagnetic induction to accelerate curing process and improve competitiveness. The results showed significant improvements in Marshall stability, flow after compaction, and strength recovery rate in healing tests after heating.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Ana M. R. Pasandin, Ignacio P. Perez
Summary: In Spain, MSc students in Civil Engineering have competencies in airport design, and a case study shows successful application of problem-based learning techniques in a workshop. This approach enhanced students' skills and social interaction, leading to high satisfaction levels among participants.
COMPUTER APPLICATIONS IN ENGINEERING EDUCATION
(2021)
Article
Construction & Building Technology
P. Orosa, A. R. Pasandin, I Perez
Summary: This study investigated the effect of three laboratory compaction procedures on the volumetric performance of CIR mixtures, finding that gyratory compaction was the most versatile and representative method. The bulk density procedure by dimensions was useful for laboratory design but overestimated air void content sizes compared to field values.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
P. Orosa, I. Perez, A. R. Pasandin
Summary: This study evaluates the short-term resilient behavior of cold in-place recycled (CIR) asphalt mixtures with bitumen emulsion. The results show that water loss during curing and stiffness increase are closely related, and mixtures with 2.50% residual bitumen and 2.75% added water exhibit the best short-term stiffness evolution.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
P. Orosa, I. Perez, A. R. Pasandin
Summary: The cold in-place recycling (CIR) method is suitable for circular economy, and triaxial tests are effective for studying the mechanical behavior of cold mixtures. Results showed that a moderate binder content provided adequate cohesion, while an excess reduced internal friction. The mix with 2.50% binder exhibited the best response in repeated load permanent deformation tests.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
P. Orosa, G. Orozco, J. C. Carret, A. Carter, I. Perez, A. R. Pasandin
Summary: This study compares the volumetric and mechanical properties of cold recycled asphalt mixtures prepared with reclaimed asphalt pavement (RAP) from different sources and with various nominal maximum sizes (NMS). It was found that particle size distribution, temperature, and air void content were the most influential factors on the mechanical properties, while the differences in NMS showed no clear trends.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Ana Maria Rodriguez Pasandin, Juan Jose Galan-Diaz, Luis Manuel Sousa da Silva, Pablo Orosa Iglesias, Ignacio Perez Perez
Summary: This study investigated the accelerated curing protocol for a CAM-type gravel emulsion, comparing its uncontrolled maturation and performance. Results showed that curing for 2 days at 50 degrees Celsius brought the mixture's performance closer to that under uncontrolled conditions, achieving total maturation after 3.5 days of curing.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Construction & Building Technology
A. R. Pasandin, I. Perez, F. J. Prego, A. Miguens
Summary: This research examines the feasibility of substituting commercial emulsifiers made by the chemical and petrochemical industries with nanocellulose. Various bitumen emulsions are created using nanocellulose fibers and crystals as emulsifying agents. The study focuses on the manufacture of cationic slow-setting bituminous emulsions for grave emulsions and finds that nanocellulose crystals can partially replace conventional emulsifying agents.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Pablo Orosa, Ignacio Perez, Ana R. Pasandin
Summary: Implementing cold solutions, such as using cold recycled mixtures (CRM), in the road sector can help reduce CO2 emissions and combat climate change. This research examines the resilient response of CRM during the curing process and determines that binder content and water loss speed are crucial factors impacting their evolution. CRM with a binder content of 2.50% shows the best short-term response, while those with a binder content of 3.00% exhibit greater stiffness values over an extended curing period. The study also reveals that CRM continues to change in stiffness even after water losses stop, indicating its evolutionary response.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Environmental Sciences
A. R. Pasandin, I. Perez, B. Gomez-Meijide, A. Ramirez, M. M. Cano
Summary: This study analyzed the feasibility of using biomass fly ashes from the paper industry as filler in cold asphalt mixture, resulting in mixtures with adequate moisture damage resistance. The compression strength of the mixture containing BioFAPI was higher than that of the control mixture, indicating its potential as a sustainable management solution for fly ashes.
WASTE AND BIOMASS VALORIZATION
(2021)
