Article
Construction & Building Technology
Daniel Oldham, Rajib Mallick, Elham H. Fini
Summary: By introducing PET and MMT additives, the shear binding between substrates and bitumen was improved, enhancing the resistance of the paving mixture to moisture damage as evidenced by an increased number of cycles before moisture stripping occurs.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Taha Ahmed, Elie Y. Hajj, Ahmed Warrag, Murugaiyah Piratheepan
Summary: Through field pavement surveys and laboratory tests, the study found that the arid climate conditions in Kuwait have led to severe pavement raveling problems and significant deterioration in pavement performance, mainly due to asphalt binder aging causing weakened adhesion strength between aggregate particles and asphalt binder, leading to raveling and stripping issues.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Construction & Building Technology
Sumon Roy, Zahid Hossain
Summary: This study utilized AFM technology to investigate the moisture susceptibility of asphalt binders, finding that the base binder and PPA-modified binder had higher DE values compared to other modified binders. Additionally, Evotherm showed better resistance to moisture damage among all the liquid anti-stripping agents tested.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2021)
Article
Engineering, Civil
Ben C. Cox, Ashley S. Carey, Jessica V. Lewis, Isaac L. Howard
Summary: This paper assesses the use of rubber tire wheel tracking in laboratory settings for asphalt mixtures, focusing on differentiating moisture damage from rutting. The analysis of extensive experiments and literature review reveals that second-generation PURWheel protocols, using a pneumatic rubber tire and testing under wet and dry conditions, offer significant contributions to the asphalt mixture testing community. The evaluation methods demonstrated the potential of rubber tire wheel tracking to improve characterization of asphalt mixtures and provide insights for standardizing protocols.
TRANSPORTATION RESEARCH RECORD
(2022)
Article
Construction & Building Technology
J. Goertz, S. Wieprecht, K. Terheiden
Summary: The study shows that construction and expansion joints in concrete structures have a significant impact on moisture transport, and a dual permeability-based moisture modeling approach can effectively describe the characteristics of moisture transport, particularly suitable for modeling moisture distribution in larger structures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
W. Jeremy Robinson, Isaac L. Howard
Summary: The majority of literature suggests that geosynthetics can significantly improve the performance of flexible pavement bases by reducing rutting or vertical pressure on weak subgrade layers. However, their effectiveness may be limited in strong subgrade soils or thick pavement layers. Airfield pavements are typically thicker and stronger than highway pavements, posing challenges for assessing the economic viability of geosynthetic inclusion in new designs. Initial cost evaluations indicate that design life extensions may be a more preferred means of quantifying geosynthetic improvement than aggregate thickness reduction.
TRANSPORTATION GEOTECHNICS
(2021)
Article
Materials Science, Multidisciplinary
Yuhang Guo, Hong Wu, Shaoyun Guo, Jianhui Qiu
Summary: In this study, a bimodal porous structure with uniform small pores on the surface and a unique laminated large pore structure in the thickness direction was successfully constructed. By increasing the draw ratio, the rejection rate and permeance of carbon nanoparticle solution were improved. Furthermore, the membrane thickness was reduced and the permeance was further increased while the selectivity slightly decreased.
MATERIALS & DESIGN
(2023)
Article
Energy & Fuels
Zhiming Chao, Yabin Dang, Yue Pan, Feiyang Wang, Meng Wang, Jiao Zhang, Chuanxin Yang
Summary: This paper proposes a new machine learning model that predicts the gas permeability of cement mortar based on the results of laboratory experiments using MEA and ADA-BPANN algorithms. The MEA optimized ADA-BPANN model demonstrates higher prediction accuracy, shorter training time, and avoidance of local optimization and overfitting. The research shows that this model has great potential for estimating the stress-dependent gas permeability of shale and is helpful for shale gas exploitation.
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2023)
Article
Geochemistry & Geophysics
Zhihui Wen, Bingtao Jia, Jianwei Wang, Jiangang Ren, Qi Wang
Summary: The characteristics of pores in anthracite from the Guhanshan Coal Mine were tested using the mercury injection method. The pore size classification and fractal analysis revealed that larger pores followed the stochastic fractal model, while smaller pores followed the dendric fractal model. The research also revealed that the gas adsorption capacity was influenced by the tortuosity fractal dimension and the specific surface area.
Article
Construction & Building Technology
Alireza Joshaghani, Mehran Shokrabadi
Summary: This article outlines the applications of Ground Penetrating Radar (GPR) in concrete pavements, including detecting layer thickness, rebar properties, defects, and base layer conditions. GPR technology is used for pavement evaluation through different approaches, providing more details of material properties, and also for thickness and air void content measurements.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Construction & Building Technology
Tiankai Che, Baofeng Pan, Dong Sha, Yuanteng Zhang, Zhanping You
Summary: This study investigated the relationship between air voids and permeability, as well as the correlation between air void type, coefficient of permeability, mechanical properties, and moisture damage in hot-mix asphalt (HMA). Results showed that effective voids and coefficient of permeability had a strong correlation, and specimens with certain air void ranges experienced greater strength loss and deformation due to moisture damage.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Jolina Karam, Ramadan Salim, Kamil Kaloush
Summary: The objective of this study was to develop a simplified process and tool for assessing the performance of Hot Mix Asphalt (HMA) mixtures in terms of rutting, fatigue, and thermal cracking. The study collected recent HMA mix design data from 25 states in the US and compared it with historical data from the Long-Term Pavement Performance (LTPP) database. The results showed that the majority of the mix designs were of satisfactory or good quality, indicating that state agencies have made improvements in mix designs over the years.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Engineering, Geological
Hengli Wang, Leng Tian, Qiong Jie, Shixiang Fei, Min Wan, Xingxing Gao, Kaiqiang Zhang
Summary: Ultrasonics have potential for modifying geological formations and have applications in various fields such as geo-energy production, carbon geological sequestration, crack monitoring, and volcanic activity prediction. However, lack of understanding about post-ultrasonic geological formations limits its practical applications. This study focuses on low-permeability sandstones and analyzes their stress sensitivity and influential factors after ultrasonic treatment. Experimental results show that ultrasonics can increase permeability by desorbing clay minerals, but higher pressures cause reductions in porosity due to irreversible plastic deformations and rigid compressions. The treated cores generally have smaller porosity compared to the original ones, indicating that ultrasonics enhance the stress sensitivity of the core. Therefore, it is important to control pore pressure when using ultrasonics for geo-energy production and carbon geological sequestration.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Construction & Building Technology
Bhaskar Pratim Das, Saswati Das, Anjan Kumar Siddagangaiah
Summary: Fatigue cracking is a major distress in asphalt pavements, with factors like aging and moisture intrusion complicating the process. This study used a probabilistic approach to examine the effects of aging and moisture conditioning on fatigue damage in asphalt mixtures. The results showed that stiffness modulus and fatigue life of asphalt mixtures increased with aging levels, but decreased with more moisture conditioning cycles. Moisture had a greater negative impact on fatigue life at lower temperatures, and the probability of fatigue damage was higher in moisture conditioned asphalt mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Xinyu Hu, Xiaowei Wang, Nanxiang Zheng, Qiang Li, Jinyue Shi
Summary: This study investigates the moisture damage evolution and durability damage evolution of porous asphalt mixtures, finding that moisture significantly influences fatigue life and results in more severe damage under wet conditions. Damage factors based on indirect tensile strength and resilience modulus are proposed to predict the loading history of porous asphalt mixtures.
