Article
Construction & Building Technology
Prajwol Tamrakar, Soheil Nazarian
Summary: The study analyzed the effects of moisture on the moduli of UAB material, finding that the moduli decreased with increasing moisture content, with the reduction pattern depending on the laboratory or field test method used.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Dusan Stehlik, Petr Hyzl, Ondrej Dasek, Ludek Malis, Robert Kaderka, Radek Komenda, Jiri Sachr, Petr Vesely, Karel Spies, Michal Varaus
Summary: In addition to conventional laboratory tests, the correct design of pavement structure requires frequent functional tests of input materials and mixtures. This study summarizes findings from long-term monitoring of low-traffic road sections and highlights the importance of dual-axis deflection measurement for identifying low bearing capacity pavement sections.
APPLIED SCIENCES-BASEL
(2022)
Article
Construction & Building Technology
Zhong Han, Wei-lie Zou, Xie-qun Wang
Summary: This paper introduces two models for predicting the water retention curve and resilient modulus-moisture content relationships of pavement materials, suitable for compacted natural and recycled unbound granular materials. Both models are simple to apply and have shown reasonable predictive ability in experimental data testing.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2021)
Article
Engineering, Civil
S. M. Robinur Mohshin Chowdhury, Emad Kassem, Hamza Alkuime, Debakanta Mishra, Fouad M. S. Bayomy
Summary: This study developed a prediction model for resilient modulus based on simple material properties, which showed good correlation with laboratory-measured properties. The study also found that the calculated resilient modulus based on internal sample deformation was approximately 24% higher than that determined from external deformation.
JOURNAL OF TRANSPORTATION ENGINEERING PART B-PAVEMENTS
(2021)
Article
Construction & Building Technology
(Jey) Jeyakaran Thavathurairaja, Adam J. Hand, Murugaiyah Piratheepan, Peter E. Sebaaly, Elie Y. Hajj
Summary: In this study, a stepwise mechanistic analysis approach was used to determine representative resilient modulus (Mr) values for unbound materials typically used in Nevada. Laboratory tests and constitutive models were employed to evaluate the resilient modulus values of crushed aggregate base, borrow material, and SG soils. Finite element analysis was conducted to compute stresses and deflection in conventional flexible pavements, which were then used to estimate the Mr values of the unbound layers.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
Jean-Pascal Bilodeau, Erdrick Leandro Perez Gonzalez
Summary: The influence of aggregate properties on the mechanical behavior of granular materials is significant. Default values are commonly used in pavement design, which limits the consideration of materials with different characteristics. This study evaluated the impact of aggregate characteristics on stiffness and damage, and proposed methods to modify the adjustment coefficients.
CANADIAN JOURNAL OF CIVIL ENGINEERING
(2022)
Article
Engineering, Civil
Jean-Pascal Bilodeau, Erdrick Leandro Perez Gonzalez
Summary: This study evaluated the influence of aggregate base characteristics on pavement stiffness and damage. The results showed that the characteristics of granular materials have a significant impact on pavement performance, especially for thin pavements. Default values are often underestimated in predicting pavement capacity.
CANADIAN JOURNAL OF CIVIL ENGINEERING
(2022)
Article
Chemistry, Physical
Meng Wang, Qunding Yu, Yuanjie Xiao, Wenqi Li
Summary: This study aimed to characterize and predict the resilient modulus (M-r) behavior of tunneling rock wastes (TRWs) used in unbound permeable aggregate base (UPAB) applications. Laboratory repeated load triaxial tests were conducted to investigate the M-r behavior under different confining pressures and deviator stresses. The accuracy of 14 classical M-r prediction models was comparatively analyzed, and an improved M-r prediction model incorporating gradation and stress variables was proposed and validated. The results showed that the gravel-to-sand ratio (G/S) and confining pressure have significant effects on M-r, and an optimal G/S value exists. The improved M-r prediction model was found to be universally applicable.
Article
Engineering, Civil
Cheng Lu, Jingyu Chen, Chuan Gu, Jun Wang, Yuanqiang Cai, Tingting Zhang, Gang Lin
Summary: The study investigated the behavior of unbound recycled concrete aggregate and recycled clay masonry blends under traffic loadings, and found that the RCM content has a significant impact on properties such as particle breakage, resilient modulus, and permanent deformation.
TRANSPORTATION GEOTECHNICS
(2021)
Article
Construction & Building Technology
Burcu Aytekin, Ali Mardani, Yesim Sema Unsever
Summary: Construction and demolition wastes have become uncontrollable due to various factors, leading to the importance of recycling and reuse. However, the lack of knowledge about the qualities of waste concrete is a significant barrier. This study investigates the quality of waste concrete and assesses its usability in combination with crushed limestone aggregate for road construction.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Arieh Sidess, Jacob Uzan, Piere Nigem
Summary: The study investigates the resilient behavior of an unbound base material and reveals that the material parameters are sensitive to the type of loading, with different functions observed between incremental loading tests and resilient modulus tests.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2021)
Article
Construction & Building Technology
Ahmed S. El-Ashwah, Eman Mousa, Sherif M. El-Badawy, Mostafa A. Abo-Hashema
Summary: This study conducted experimental testing on different unbound granular base/subbase materials used in typical pavement construction projects in Egypt, focusing on material stiffness and strength parameters. The results provide insights and validation for adjustments in the current pavement structural design method in Egypt.
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
(2022)
Article
Construction & Building Technology
Mingming Cao, Wanqing Huang, Yiwen Zou, Zhiyong Wu
Summary: The study compared the equivalent resilient moduli of different structural layers in three different asphalt pavement structures, indicating that the results obtained from the inversion method are closer to actual values. When calculating the equivalent resilient modulus, the influence of layer thickness and the number of structural layers should be considered. The more structural layers and the larger the difference in the interlayer modulus ratio, the larger the deviation of the equivalent resilient modulus of the top surface of the base layer.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
S. M. Robinur Mohshin Chowdhury
Summary: This study evaluated the resilient modulus of 18 different aggregate base and subbase materials, comparing four different constitutive models. Results showed that all selected models performed well for the chosen aggregates, with most goodness of fit values (R-2) exceeding 0.90.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Green & Sustainable Science & Technology
Salamat Ullah, Arshad Jamal, Meshal Almoshaogeh, Fawaz Alharbi, Jawad Hussain
Summary: This study investigated the resilience characteristics of unbound granular materials using the repeated load triaxial test, and found that moisture content, material gradation, and stress level significantly affect the resilient modulus. A linear model was developed to predict the change in resilient modulus with moisture content, and an improved modified Uzan stress moisture model was proposed. The research provides a benchmark for validating other numerical data.