Article
Green & Sustainable Science & Technology
Qiang Li, Guangxu Sun, Yang Lu, Yuanpeng Meng, Sang Luo, Lei Gao
Summary: The study evaluates the performance of recycled asphalt binders prepared using warm-mix recycling technology in terms of linear viscoelasticity, rutting resistance, fatigue resistance, and low-temperature crack resistance. Different warm mix asphalt (WMA) technologies and modifiers have significant effects on the performance of recycled binders. The addition of crumb rubber powder (CRP) in warm-mix recycled binders shows the best comprehensive performance, and suitable modifiers are recommended to compensate for the loss of pavement performance caused by the use of WMA technologies and RAP.
JOURNAL OF CLEANER PRODUCTION
(2021)
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
Construction & Building Technology
Hao Chen, Mequanent Mulugeta Alamnie, Diego Maria Barbieri, Xuemei Zhang, Gang Liu, Inge Hoff
Summary: Dynamic modulus is a key parameter for performance prediction and pavement design of asphalt materials. The Indirect Tensile (IDT) test and the Uniaxial Compression (UC) test are commonly used to characterise the dynamic modulus of asphalt mixtures. This study compares the effect of these two test methods on the dynamic modulus and stress-strain state of asphalt mixtures. The results show that the mechanical properties obtained from both tests are similar, with some differences at lower and higher frequencies.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
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
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
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
Engineering, Civil
Mojtaba Khodadadi, Alireza Azarhoosh, Ali Khodaii
Summary: This study found that polyethylene terephthalate can improve the resistance of asphalt mixtures to moisture, especially for mixtures containing aggregates prone to moisture damage.
PERIODICA POLYTECHNICA-CIVIL ENGINEERING
(2021)
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)
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
Lin Ma, Wen Nie, Xiaoning Zhang, Junjian Yan, Duanyi Wang
Summary: This study focuses on the calculation and analysis of Poisson's ratio of asphalt mixtures using the indirect tensile test. The results show that temperature and loading frequency have a significant influence on Poisson's ratio, and different types of asphalt and mix grading also affect Poisson's ratio. Recommended values of Poisson's ratio for AC asphalt mixtures are proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Weimin Song, Zicheng Deng, Hao Wu, Yiqun Zhan
Summary: Semi-circular bending (SCB) test was conducted to characterize the fracture behaviors of asphalt mixtures with different aggregate shapes. XFEM simulation was used to observe the initiation and propagation of cracks under different temperatures. The results showed that the shape of aggregates has an effect on the failure load and dissipated fracture energy in SCB test.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Runhua Zhang, Jo E. Sias, Eshan Dave
Summary: This study presents a practical and innovative approach to predict the complex modulus of asphalt mixtures by predicting the shape parameters of master curves using advanced statistical analysis methods. The developed models show good effectiveness and capability to predict the values of complex modulus at any given frequency and temperature.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Carlos Rodolfo Marin-Uribe, Luz Marcela Restrepo-Tamayo
Summary: This paper investigates the tensile strength performance of hot mix asphalt under different conditions, including the presence of reclaimed asphalt pavement, different gradations, asphalt content, and test temperatures. The study demonstrates the dependence of tensile strength on the study variables, with noticeable trends for the type of test and test temperature. It verifies a reasonable correlation between IDT and SCB tensile strength, as well as a good correlation when incorporating data reported in previous research.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Jianying Hu, Tao Ma, Yuhao Zhu, Xiaoming Huang, Jian Xu
Summary: This study investigates the use of limestone in porous asphalt concrete as a potential alternative to basalt due to its lower cost and comparable performance. Results show that limestone-based PAC has advantages in certain engineering properties compared to basalt-based PAC, making it a promising option for the lower layer of double-layer porous asphalt pavement.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Huailei Cheng, Yuhong Wang, Liping Liu, Lijun Sun, Yining Zhang, Ruikang Yang
Summary: The study revealed that the compressive moduli of the asphalt mixture exceed the tensile ones over the entire frequency domain, while the tensile moduli obtained from indirect tensile and four-point bending tests are in good agreement, especially at the intermediate- to high-frequency domain.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Engineering, Civil
Syed Azmat Ali Shah, Khan Shahzada, Bora Gencturk, Qazi Sami Ullah, Zawar Hussain, Muhammad Javed
Summary: This study investigates the influence of brick masonry infill walls on the seismic performance of reinforced concrete (RC) frames. It was found that infill walls improve the strength and stiffness of the RC frame, but adding a door opening reduces this improvement. Shifting the door opening from the side to the center enhances the strength and stiffness of the RC frame.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Construction & Building Technology
Hammad Ahmed Shah, Sardar Kashif Ur Rehman, Muhammad Faisal Javed, Yusra Iftikhar
Summary: In this study, gene expression programming (GEP) was used to model the compressive strength and splitting tensile strength of concrete with fly ash as a replacement for Portland cement. The developed GEP models showed high predictive and generalization capability compared to other modeling techniques. Sensitivity and parametric analysis were also performed to evaluate the influence of GEP algorithm parameters on model performance.
STRUCTURAL CONCRETE
(2022)
Article
Chemistry, Physical
Raheel Asghar, Muhammad Faisal Javed, Raid Alrowais, Alamgir Khalil, Abdeliazim Mustafa Mohamed, Abdullah Mohamed, Nikolai Ivanovich Vatin
Summary: This research introduces a novel AI-based gene expression programming approach for predicting the lateral load carrying capacity of RC rectangular columns under earthquake loading. Two analytical models were developed to compute the flexural and shear capacity of these columns, outperforming the ACI 318-19 design code in terms of performance and accuracy. Performance evaluation based on fitness indicators indicated superior results for the proposed models compared to the existing design standards.
Article
Chemistry, Physical
Farooq Azam Khanzada, Kashif Nazir, Muhammad Ishtiaq, Muhammad Faisal Javed, Sardar Kashif-ur-Rehman, Fahid Aslam, Muhammad Ali Musarat, Kseniia Iurevna Usanova
Summary: This study investigated the effect of adding polypropylene fibers to PAC. The results showed that PAC with polypropylene fibers had higher tensile strength and ductility, but lower compressive strength and stability at 250 degrees C, compared to the control mix.
Article
Chemistry, Physical
Muhammad Nasir Amin, Kaffayatullah Khan, Muhammad Faisal Javed, Dina Yehia Zakaria Ewais, Muhammad Ghulam Qadir, Muhammad Iftikhar Faraz, Mir Waqas Alam, Anas Abdulalim Alabdullah, Muhammad Imran
Summary: This study used multi expression programming (MEP) to construct an empirical model for predicting the compressive nature of concrete made with rice husk ash (RHA). The study identified the key factors that impact the compressive strength of RHA concrete and found that age of the concrete sample, amount of cement, and amount of aggregate are the most significant factors. The findings have the potential to increase the re-use of RHA in green concrete production, promoting environmental protection and financial gain.
Article
Environmental Sciences
Bakht Rawan, Waheed Ullah, Rafi Ullah, Tahir Ali Akbar, Zainab Ayaz, Muhammad Faisal Javed, Islamud Din, Siddique Ullah, Mubashir Aziz, Abdullah Mohamed, Nasir Ali Khan, Owais Khan
Summary: This study assessed the quality and quantity of roof-harvested rainwater in a specific area, finding that most physicochemical parameters met WHO guidelines except for pH, turbidity, and some trace metals. The study also indicated a high potential for roof-harvested rainwater in the area.
Article
Green & Sustainable Science & Technology
Tahir Ali Akbar, Siddique Ullah, Waheed Ullah, Rafi Ullah, Raja Umer Sajjad, Abdullah Mohamed, Alamgir Khalil, Muhammad Faisal Javed, Anwarud Din
Summary: This paper investigates and develops new models for landslide hazards in Muzaffarabad District, Pakistan. Influential factors such as land use, elevation, slope, rainfall, and topographic index were used in the landslide modelling. The GIS-based Analytic Hierarchy Process (AHP) model was applied to develop a landslide hazard zone map. The results show a strong relationship between the model development and validation, indicating high accuracy.
Article
Green & Sustainable Science & Technology
Arsalan Raza, Muhammad Umair Ali, Ubaid Ullah, Muhammad Fayaz, Muhammad Junaid Alvi, Karam Dad Kallu, Amad Zafar, Sarvar Hussain Nengroo
Summary: Traffic congestion is a well-known problem that affects populations worldwide. This study used multi-criteria decision making techniques and traffic simulation software to assess the transportation situation at Taxila intersection in Pakistan and found that a parking area is the most sustainable alternative to reduce congestion.
Review
Green & Sustainable Science & Technology
Abdul Muqeet Shah, Rida Hameed Lodhi, Muhammad Faisal Javed, Michal Jasinski, Elzbieta Jasinska, Miroslava Gono
Summary: The usage of plastic materials is increasing day by day in our daily life, and while they have benefits, the disposal of waste plastic materials has become a serious problem. Plastic use in roads enhances road construction, extends road life, and improves the environment. This research reviews the use of waste plastics in asphalt pavement, examining properties such as stability, flow, and fatigue to boost their usage. It is concluded that the use of waste plastic in asphalt pavement enhances road quality, benefits the environment, and is cost-effective for underdeveloped countries.
Article
Green & Sustainable Science & Technology
Rukhshanda Rehman, Muhammad Sagheer Aslam, Elzbieta Jasinska, Muhammad Faisal Javed, Miroslava Gono
Summary: This paper discusses the technical aspects of urban drinking water systems (UDWS), focusing on the design, construction, operation, and maintenance factors. A set of guidelines for evaluating the status of various sub factors in a quantitative format was developed through involving stakeholders. It is concluded that a transdisciplinary framework, stakeholder involvement, and adopting appropriate processes and techniques can improve the sustainability of stressed urban water systems.
Article
Construction & Building Technology
Usman Akmal, Sana Fatima, Nauman Khurram, Qasim Shaukat Khan, Tauqir Ahmed, Hisham Alabduljabbar, Youssef Ahmed Awad
Summary: With the increasing construction activity, there is a growing demand for fine and coarse aggregates. However, relying on limited sources would quickly deplete the natural resources of aggregates. To alleviate the pressure on one source, this study conducted experiments to improve the gradation of natural river sand by adding quarry dust. The enhanced sand gradation showed improved concrete properties and cost-effectiveness compared to control concrete made with coarse pit sand.
ADVANCES IN CIVIL ENGINEERING
(2023)
Article
Engineering, Civil
Youssef A. Awad, Ahmed M. El-Fiky, Hosam M. Hegazy, Mahmoud G. Hasan, Ibrahim A. Yousef, Ahmed M. Ebid, Mohamed A. Khalaf
Summary: This study presents a method to measure the elastic and rigidity moduli of GFRP poles and analyzes the influence of sample size, shape, and shear deformation on the results. The findings suggest that the shear modulus can be neglected and highlight the importance of scale effect on the test results.
CIVIL ENGINEERING JOURNAL-TEHRAN
(2023)
Article
Engineering, Civil
Youssef A. Awad, Ahmed M. EL-Fiky, Hosam M. Elhegazy, Mahmoud G. Hasan, Ibrahim A. Yousef, Ahmed M. Ebid, Mohamed A. Khalaf
Summary: The study aims to determine the optimum strengthening technique to improve the lateral deflection performance of GFRP poles. Through experimental research, it was found that the extended stub, steel angles, and bracing bars can increase the flexural stiffness, with the steel angle technique showing the best efficiency.
CIVIL ENGINEERING JOURNAL-TEHRAN
(2023)
Article
Construction & Building Technology
Hamad Hassan Awan, Arshad Hussain, Muhammad Faisal Javed, Yanjun Qiu, Raid Alrowais, Abdeliazim Mustafa Mohamed, Dina Fathi, Abdullah Mossa Alzahrani
Summary: This research study develops empirical predictive models for Marshall parameters in asphalt pavements using innovative machine learning techniques. The models show high prediction and generalization capability for the output parameters, as evident by the correlation coefficient (R) exceeding 0.90.
