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
Construction & Building Technology
Ghazi Al-Khateeb, Alaa Sukkari, Waleed Zeiada, Helal Ezzat
Summary: The thickness of the asphalt binder's film in Hot-Mix Asphalt (HMA) is crucial for pavement durability. This study presents a new approach using a reflective digital stereo microscope to determine the film thickness. Image analysis was performed using thresholding process with ImageJ software. Six different mixtures were investigated, and their asphalt film thickness was correlated to dynamic modulus (E*) and rutting measured by flow number. Results showed that asphalt film thickness significantly influenced the dynamic modulus at intermediate and high temperatures. Increasing asphalt film thickness led to a significant decrease in flow number and rutting, particularly for gap-graded and Bailey's gradation mixtures.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Chemistry, Physical
Fazli Karim, Jawad Hussain
Summary: This study used modern measurement methods to investigate the asphalt binder film thickness in recycled asphalt mixtures, finding that ABFT is closely related to the content of recycled materials and rejuvenators. Image analysis revealed a small fluctuation range of ABFT in recycled asphalt mixtures, typically ranging from 0.4 microns to 2 microns, without being influenced by the content of recycled materials or rejuvenators.
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
Multidisciplinary Sciences
Mustafa Calisici, Metin Guru, M. Kursat Cubuk
Summary: This study evaluated the effects of polymeric triethylene glycol-based polyboron (PTEGB) and organic-based magnesium oxide (OBMO) additives on asphalt binders. The results showed that these additives reduced the oxidation and aging of asphalt, and improved the mechanical performance of asphalt mixtures.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Construction & Building Technology
Sang Luo, Jia Sun, Jing Hu, Shicheng Liu
Summary: This study explores the performance evolution process of hot-mix epoxy asphalt binder (HEAB) with different components and its pavement performance. The results show that the tensile properties of HEAB are significantly improved with an EP content of 30% by weight and phase transition occurs at an EP content of 50% by weight. The recommended EP content in HEAB is 40% by weight, and the mixing temperature of 160 degrees C ensures sufficient construction allowable time range. The HEAB mixture has excellent comprehensive properties, particularly high-temperature stability, but inferior water stability and skid resistance compared to the SMA mixture.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
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
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
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.
Review
Construction & Building Technology
Paulo P. O. L. Dyer, Maryangela Geimba de Lima
Summary: Roads are the main means of transportation worldwide, bringing urbanization and socioeconomic development to inhospitable regions, but also demanding large quantities of natural resources. Waste Foundry Sand is an industrial by-product produced in large quantities globally, which can be used as a partial replacement for fine aggregate in hot mix asphalt, having similar physical, chemical, and environmental characteristics to conventional aggregates.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Dai Xuan Lu, Marie Enfrin, Yeong Jia Boom, Filippo Giustozzi
Summary: The recyclability of reclaimed asphalt pavement (RAP) from conventional asphalt concrete has been extensively studied. However, there is still uncertainty about the recyclability of plastic-modified asphalt at the end of its service life (P-RAP). This is mainly due to the lack of aged P-RAP material from the field, indicating that the use of recycled plastics in asphalt is still in the research phase. This study aims to evaluate the future recyclability of P-RAP and found that it can be fully recycled and provides similar performance to standard RAP mixes.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Environmental
Bruno Gambalonga, Joao Lucas Nicolini, Jordana Mariot Inocente, Claus Troger Pich, Elidio Angioletto, Fabiano Raupp Pereira, Oscar Rubem Klegues Montedo, Sabrina Arcaro
Summary: This study aims to evaluate the value of metal smelting waste foundry sand (WFS) as an aggregate in hot-mix asphalt mixtures (HMA) using systematic criteria. The results showed that a composition containing 10 wt% of waste foundry sand was suitable for recovery into HMA.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Construction & Building Technology
M. A. Dalhat, Sami A. Osman, Nuhu Dalhat Mu'azu, Omar Alagha
Summary: This study evaluates the potential of using oil-sludge as an oil-rejuvenator in hot mix asphalt concrete containing reclaimed asphalt pavement (RAP). The effects of different rejuvenators on the performance of RAP in asphalt concrete were analyzed. The results showed that using oil-sludge and cement treated oil-sludge as rejuvenators improved the performance of RAP-containing asphalt concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Gholam Hossein Hamedi, Mohammad Mazhari Pakenari, Masoud Toghrol Tabrizi, Zahra Ranjbar Pirbasti
Summary: This study examined the effects of adding 1% and 2% nano-cobalt oxide (nano-CoO) to asphalt binder on its rheological behavior and the mechanical characteristics of asphalt mixtures. The results showed that the addition of nano-CoO increased the complex modulus (G*) and reduced the phase angle (delta) of the modified asphalt binder at high temperatures, improving its rutting resistance. At moderate temperatures, the addition of nano-CoO reduced the fatigue parameter of the modified asphalt binder compared to the control. The fatigue tests also demonstrated a significant increase in the fatigue life of the modified samples compared to the control samples.
ADVANCES IN CIVIL ENGINEERING
(2023)
Article
Construction & Building Technology
Muhammad Naveed, Muhammad Azeem Raza, Raza Mehmood
Summary: Utilizing waste materials like LDPE and CR as additives for HMA can enhance pavement performance and cost effectiveness. Increasing asphalt binder content leads to higher stiffness modulus, with LDPE modified mixtures showing better strength performance.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Mojtaba Ziyadi, Hasan Ozer, Maryam Shakiba, Imad L. Al-Qadi
Summary: The study investigated the impact of pavement structural rolling resistance on vehicles' excess fuel consumption and proposed a practical approach to assess the influence of pavement deflection on fuel consumption. The proposed model was validated through sensitivity analysis and provided estimated fuel consumption for heavy trucks under different loading, temperature, and speed scenarios.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Construction & Building Technology
Jose Rivera-Perez, John Huang, Imad L. Al-Qadi
Summary: This study investigates the sources of pay disincentives in the two HMA pay specifications developed by the Illinois Department of Transportation, and finds that production and construction issues are the main causes of pay disincentives to contractors.
ROAD MATERIALS AND PAVEMENT DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Hailu Yang, Qun Chen, Huifang Liu, Haoran Chang, Shih-Hsien Yang, Linbing Wang, Pengfei Liu
Summary: This paper proposes a distributed vibration reduction and energy harvesting method for bridges based on the vibration control method and energy harvesting principle. The analytical solutions of the induced electromotive force, output power, and magnetic damping were deduced through an electromagnetic theory analysis. A new method of joint simulation and modeling analysis of vibration and energy output was proposed. The feasibility and vibration reduction effect of the designed method were verified.
APPLIED SCIENCES-BASEL
(2023)
Article
Construction & Building Technology
Lama Abufares, Qingqing Cao, Imad L. Al-Qadi
Summary: Ground-penetrating radar (GPR) is used to assess civil structures like pavements by predicting asphalt concrete (AC) layer thicknesses and dry densities. Moisture content quantification in AC improves density prediction, while in cold recycled pavements, it helps monitor the curing process. The Al-Qadi-Cao-Abufares (ACA) model predicts AC density and moisture content accurately.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2023)
Article
Construction & Building Technology
Zehui Zhu, Imad L. Al-Qadi
Summary: This article proposes a deep neural network, CrackPropNet, for measuring crack propagation on asphalt concrete (AC) specimens. It offers an accurate, flexible, efficient, and low-cost solution using images collected during cracking tests. CrackPropNet differs from traditional deep learning networks by learning to locate displacement field discontinuities through feature matching in reference and deformed images. It achieved high F-1 scores on the testing dataset and showed promising generalization on different images. The CrackPropNet can accurately and efficiently detect complex crack patterns in AC cracking tests, making it useful for characterizing cracking phenomena and validating theoretical models.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2023)
Article
Engineering, Civil
Jose Rivera-Perez, Imad L. Al-Qadi
Summary: Asphalt concrete (AC) balanced mix design (BMD) is used to control pavement cracking and rutting potential by selecting aggregate gradation, component volumetrics, and binder content. This study proposes an autoencoder deep neural network (ADNN) to develop optimized AC mix design alternatives that can meet a prescribed flexibility index (FI) and rut depth (RD). The autoencoder learns the patterns in the input data and creates a compressed representation of the AC mix design. Models were trained using a database of 5,357 data sets to predict binder content and aggregate gradation based on target mix type, FI, and RD.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Engineering, Civil
Ester Tseng, Imad L. Al-Qadi, Erol Tutumluer, Issam I. A. Qamhia, Hasan Ozer
Summary: This paper presents case studies to demonstrate that appropriately designed and constructed flexible pavements can withstand climatic changes. Techniques such as mechanically or chemically stabilized subgrade, proper drainage, and minimizing plastic fines in unbound layers can effectively control moisture damage.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Engineering, Civil
Imad L. Al-Qadi, Angeli Jayme, Egemen Okte
Summary: The Georgia Department of Transportation (GDOT) has successfully used a combination of open-graded friction course (OGFC) and stone-matrix asphalt (SMA) layers on its Interstate highways for over two decades. Through life-cycle assessment and cost analysis, GDOT compared the environmental and economic impacts of different resurfacing cycles on a section of Interstate 95. The evaluation showed that the SMA and micro-milling combination had positive outcomes in terms of field performance, environmental impacts, and long-term economic benefits.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Engineering, Civil
Izak M. Said, Imad Al-Qadi
Summary: A framework for incorporating dynamic loading in pavement design is introduced, consisting of five main steps. Input parameters are determined, and a database of critical pavement responses is built using finite element models. AASHTOWare's transfer function is used to predict pavement damage and calculate the international roughness index. The load spectrum is adjusted to include roughness-induced dynamic loading. A simple analytical dynamic-loading model is developed, and multiple case studies were performed, validating the outcome.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Engineering, Civil
Xiuyu Liu, Imad L. Al-Qadi
Summary: This paper presents an integrated vehicle-pavement approach and investigates the excess fuel consumption of a seven-DOF full-car model on rough pavements. The study concluded that overlooking local roughness variance may underestimate excess fuel consumption by 30%. Compared with a 2D half-car model, a 3D full-car model reduces computation error of excess fuel consumption by approximately 11%.
JOURNAL OF TRANSPORTATION ENGINEERING PART B-PAVEMENTS
(2023)
Article
Engineering, Civil
Watheq Sayeh, Imad L. Al-Qadi
Summary: Pay for Performance (PFP) is a statistical-based quality assurance specification used to evaluate asphalt concrete construction. The study analyzed data from highway construction seasons in Illinois to determine variability trends. The results showed that reducing density standard deviation led to an increase in pay factor. If density standard deviation had been reduced, the average increase in pay per project would be $38,000.
JOURNAL OF TRANSPORTATION ENGINEERING PART B-PAVEMENTS
(2023)
Article
Construction & Building Technology
Firmansyah Rachman, Shih-Hsien Yang, Hanna Chintya, Yin-Hong Chen, Hoai-Nam Tran
Summary: The research aims to investigate the effectiveness of lignin bio-additives derived from black liquor paper pulp as asphalt antioxidants. Two lignin bio-additives, H-L and S-L, were developed by acidifying black liquor with hydrochloric and sulfuric acid. The laboratory aging procedures used in this study included the Rolling Thin Film Oven and the Ultraviolet Chamber methods. The results showed that S-L demonstrated superior antioxidant performance compared to H-L, with the lowest reduction in |G*c|, the lowest decrease in fatigue life, and the lowest increment in asphaltene proportion.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Jose Rivera-Perez, Alireza Talebpour, Imad L. Al-Qadi
Summary: This study developed two deep learning models to predict the flexibility index and rut depth in the asphalt concrete mix design. The models were trained based on a large database and Monte Carlo Dropout simulations were used to compute the distribution of predicted results. The developed models provide more accurate predictions for AC mix design.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2023)
Article
Construction & Building Technology
Babak Asadi, Ramez Hajj, Imad L. Al-Qadi
Summary: This paper presents a probabilistic model for predicting the dynamic modulus of asphalt concrete using a Bayesian Neural Network. The model successfully predicted unseen testing datasets and enhanced interpretability through SHAP analysis.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2023)
Article
Engineering, Civil
Jose J. Rivera-Perez, Imad L. Al-Qadi
Summary: This study evaluated the impact of asphalt concrete properties on flexibility index and rut depth by collecting extensive I-FIT and HWTT test results and conducting data analysis and feature ranking. The results identified the critical properties that significantly influenced flexibility index and rut depth, providing guidance for AC mix designers to achieve the required cracking and rutting performance by controlling mix design parameters.
JOURNAL OF TRANSPORTATION ENGINEERING PART B-PAVEMENTS
(2023)