Article
Construction & Building Technology
A. Kazuo Kuchiishi, Kangjin ''Caleb'' Lee, B. Shane Underwood
Summary: This study proposes a simplified protocol for evaluating the fatigue cracking characteristics of asphalt mixtures using the direct tension cyclic fatigue test. By re-evaluating the method to estimate the appropriate Superpave gyratory compacted samples' mass, the amount of material needed is reduced. Additionally, statistical analysis shows that reusing specimens tested via AASHTO TP 132 for the direct tension cyclic fatigue test does not result in significant differences.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Arsalan Raza, Imran Khan, Rana Faisal Tufail, Jana Frankovska, Muhammad Umar Mushtaq, Abdellatif Salmi, Youssef Ahmed Awad, Muhammad Faisal Javed
Summary: In this research, the moisture damage performance of hot mix asphalt (HMA) was enhanced by treating the aggregate surface with suitable additives. The results showed that after treating the aggregate surface, the dry and wet strength and stiffness of HMA were improved. The correlation between tensile strength ratio (TSR) and strength loss indicated a strong relationship, and the additives improved the wettability of asphalt binder over aggregate, resulting in improved adhesion between them.
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
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
Materials Science, Characterization & Testing
Hongfu Liu, Wenwen Ge, Guoxi Liang, Xinyu Yang, Liyin Chen, Dongzhao Jin, Chenfeng Chu, Xiangbin Gong, Huanan Yu, Songtao Lv
Summary: This study aims to better evaluate the fatigue damage properties of asphalt mixtures by testing and characterizing the fatigue damage behavior of fine aggregate matrix (FAM) and HMA. The findings show that there is a high degree of shape and change similarity between the master curves of dynamic modulus and phase angle for FAM and HMA prepared by the same asphalt binder. The fatigue performance of HMA and FAM were evaluated by DR and had higher discrimination ability and sensitivity. There is a significant correlation between HMA and the FAM fatigue index DR.
JOURNAL OF TESTING AND EVALUATION
(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
Niya Dong, Duanyi Wang, Shaowei Zhang, Zhaojie Chen, Haixiu Liang, Fujian Ni, Jiangmiao Yu, Huayang Yu
Summary: It was found that all analyzed indicators except M-r show significant stress-dependency; the vast majority of strain can be recovered with an increased stress playing a negative role in recovery behavior. J(nr) and R are superior to other indicators in statistically differentiating the viscous and elastic properties of different asphalt mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Murat Vergi Taciroglu, Fatih Ergezer, Tahsin Baykal, Ekinhan Eriskin, Serdal Terzi
Summary: The usability of waste quartz sand as a filler material in hot bituminous mixtures was investigated. The strength values and moisture sensitivity of the samples were determined. The results showed that the samples with 50% content had the best strength and track performance.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
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
Construction & Building Technology
Firas Barraj, Adel Elkordi
Summary: This study investigated the pros and cons of using unclassified fractionated RAP in Superpave asphalt mixtures at different percentages. The results indicated that there was no significant difference in dynamic modulus and phase angle properties between different percentages of unclassified RAP materials and conventional hot asphalt mixture, suggesting that the use of unclassified RAP materials may indeed be appropriate. Additionally, flow number tests were conducted to evaluate the rutting resistance of the mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Yiqun Zhan, Hao Wu, Weimin Song, Zihao Xu
Summary: This study investigates the flowability and compaction behaviors of hot mix asphalt (HMA) with reclaimed asphalt pavement (RAP) and different asphalt contents. The contact parameters and relations were determined using slump test and angle of repose (AoR), showing a direct impact of RAP and asphalt content on flow behaviors. The study suggests a feasible parameter calibration method to characterize the flowability of HMA with or without RAP.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Juan Carlos Quezada, Cyrille Chazallon
Summary: In this study, the complex modulus test of asphalt mixtures was numerically reproduced using the LMGC90 code, and the numerical model successfully replicated the viscoelastic properties obtained from experimental tests. The influence of particle shape on mechanical performances was analyzed.
ROAD MATERIALS AND PAVEMENT DESIGN
(2022)
Article
Materials Science, Composites
Mohammed A. Abed, Ahmed F. Al-Tameemi, Alaa H. Abed, Yu Wang
Summary: Using polymer to modify asphalt binder is a popular method in pavement engineering. This study evaluates the effect of polymer addition on the mechanical and rheological properties of modified asphalt concrete through direct tensile test. The results show that SBS improves the properties of asphalt concrete, while a mixture of SBS and PVC further enhances the mechanical properties but decreases the toughness.
POLYMER COMPOSITES
(2022)
Article
Construction & Building Technology
Inamullah Khan, Abdul Wahab Khattak, Alireza Bahrami, Shahab Khattak, Ali Ejaz
Summary: This study focuses on the impacts of adding different contents of nano-silica and styrene-butadiene-styrene on the performance of flexible pavements. Various tests were conducted to evaluate the modified and unmodified mixtures. The results show that nano-silica improves the mechanical properties of the specimens, and temperature and modifiers also affect the performance. A developed rutting prediction model exhibits a good fit with the experimental data. Nano-silica and styrene-butadiene-styrene have positive impacts on the mechanical properties of hot mix asphalt specimens.
Article
Construction & Building Technology
Tacettin Geckil, Ceren Beyza Ince, Zulfukar Aksagan
Summary: This study investigated the effect of Oak Ash on the mechanical properties of hot mix asphalt and found its potential in improving the performance of the mixture. Adding 2% Oak Ash can increase the resistance of the pavement against deterioration and reduce maintenance and repair costs.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
