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
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
Chemistry, Physical
Anda Ligia Belc, Erdem Coleri, Florin Belc, Ciprian Costescu
Summary: The study shows that using warm mix additives can reduce the mixing and compaction temperatures of asphalt concrete by 40 degrees Celsius without compromising long-term performance, thus reducing fuel consumption and greenhouse gas emissions.
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
Jie Gong, Ya Liu, Yongjia Jiang, Qingjun Wang, Zhonghua Xi, Jun Cai, Hongfeng Xie
Summary: Sasobit has been widely used as a WMA additive in environmentally friendly pavement construction. When incorporated into WEAB, Sasobit improves viscosity, extends operational lifetime, and enhances tensile strength. However, it may slightly reduce damping properties and thermal stability.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2021)
Article
Construction & Building Technology
Runhua Zhang, Aisan Ranjbar Moshfeghi, Fujie Zhou, Debakanta (Deb) Mishra
Summary: Warm-Mix Asphalt (WMA) is gaining popularity due to its lower production temperatures and associated environmental and economic benefits. A research study sponsored by the Oklahoma Department of Transportation (ODOT) investigates the effects of different chemical WMA additives and lower production temperatures on asphalt binder and mixture properties. The study found that certain WMA additives may lead to inferior properties after aging, highlighting potential long-term performance concerns. Good correlations were observed between binder rheological parameters and chemical indices, indicating the possibility of using FTIR as a quick screen for binder selection.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Afshar Yousefi, Ali Behnood, Ata Nowruzi, Hamzeh Haghshenas
Summary: Global warming and reduced energy resources are driving the search for alternative materials and technologies for pavement construction. This research focused on investigating the mechanical and durability performance of WMA mixtures containing reclaimed asphalt pavement (RAP) with different types of additives. Results showed that the performance of the mixtures varied depending on the WMA additive, with PAWMA (R) decreasing resistance to moisture damage. Despite decreasing flexibility and cracking resistance, incorporating RAP material led to improved resistance to rutting. Mixtures containing RAP and Kaowax (R) had the highest flow number value, while those with Zeolite (R) had the lowest. Furthermore, mixtures containing RAP and PAWMA (R) showed the highest resistance to moisture damage and best resilient modulus and cracking resistance among all mixtures studied.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Bei Chen, Xin Yu, Fuqiang Dong, Wenxiu Wu, Yuanzhe Zu, Shisong Ren
Summary: This paper studied the effects of warm-mix additives on the rheological and microstructural properties of high-viscosity modified asphalt (HVMA) to determine the optimal conditions. Various warm-mix additives were tested, and the results showed that all additives reduced the viscosity of HVMA at high temperatures and achieved warm mixing effects. However, certain additives increased the absolute viscosity at lower temperatures. GLWBR, a newly introduced warm additive, improved the high-temperature rheological performance of HVMA without significant effects on low-temperature and aging performance. These findings were confirmed by microstructural observations.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Zihao Chen, Henglong Zhang, Haihui Duan, Caijun Shi
Summary: Thermochromic asphalt materials can reduce mixing and compaction temperatures, increase optical reflectance, lower pavement temperature, decrease heat release to urban atmosphere, improve urban microclimate, and contribute to sustainable development through warm-mix asphalt technology.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Multidisciplinary
Munder Bilema, Choon Wah Yuen, Mohammad Alharthai, Zaid Hazim Al-Saffar, Salam Ridha Oleiwi Aletba, Nur Izzi Md Yusoff
Summary: This investigation focuses on the application of warm mix asphalt (WMA) technologies to address workability concerns linked to rubberized asphalt binders. The study comprehensively characterizes the physical attributes of rubberized asphalt binders modified with different WMA additives. The findings demonstrate that the use of Sasobit as an additive results in the highest levels of hardness and softening point in the rubberized asphalt binder, along with significant improvements in workability and stiffness modulus.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Marek Iwanski, Anna Chomicz-Kowalska, Krzysztof Maciejewski, Mateusz M. Iwanski, Piotr Radziszewski, Adam Liphardt, Jan B. Krol, Michal Sarnowski, Karol J. Kowalski, Piotr Pokorski
Summary: This study investigates the effects of simultaneous mechanical foaming using water and fluxing with a bio-derived agent on the properties of three different asphalt binders. The results show that the effects of foam on the binders are only short-term and do not persist after 14 days. The fluxing agent causes significant changes in the consistency of all binders. The performance characteristics of the 50/70 and 45/80-55 binders are severely affected, resulting in a significant decrease in high-temperature performance. On the other hand, the 45/80-80 binder shows an improvement in all performance characteristics after 14 days of foaming.
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
Ramesh Adepu, V. Venkat Ramayya, A. Mamatha, V. Vinayaka Ram
Summary: This research investigates the recommended grade II Bituminous Concrete mixture and explores the effects of adding warm mix additive, RAP-derived aggregates, and basalt fibers. The study includes tests on the binder, micro structure analysis, and various performance tests to assess rut resistance, fracture behavior, and fatigue resistance. The results show that an AC mixture with 30% RAP materials, 6% chopped basalt fibers, and 4% Sasobit warm mix additive meets the target performance standards.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Xingmin Liang, Xin Yu, Chen Chen, Gongying Ding, Jiandong Huang
Summary: This paper investigates the rheological properties of high viscosity asphalt (HVA) with warm-mix asphalt (WMA) additives for porous pavement construction. The study finds that the addition of WMA additives significantly reduces the rotational viscosity of HVA, improving its workability. However, some additives have adverse effects on the fatigue performance at intermediate temperatures and crack resistance at low temperatures. Therefore, it is recommended to use HVA with 1% Evotherm for construction in porous asphalt pavements.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Faheem Sadiq Bhat, Mohammad Shafi Mir
Summary: The study demonstrated that the addition of warm mix additives can reduce the viscosity of asphalt binders, improve high-temperature performance, and enhance resistance to fatigue cracking.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)