-This paper represents a pavement design guide for highways in Sudan. It is intended to provide a simple and easily applied method for determining an appropriate pavement structure for the expected design criteria. In this paper, detailed subgrade study, socio-economic study and axle loading & traffic survey have been carried out. This is meant to provide reliable and first hand data. The main findings of this paper comprise: the Sudan subgrade soil study, the guides to choose the traffic growth rates, the trucks damage factors, the guides to arrive at the correct Equivalent Standard Axles in the design period Moreover, this paper produced a design catalogue that contain 308 pavement design section to be used in Sudan and anywhere in the globe as any other international pavement design catalogue.
Pavement strength evaluation is necessary to ensure the sustainability of airfield pavements. This study focuses on different methods of airfield pavement strength evaluation. These methods include the determination of tensile stress-strain at the bottom of Hot Mix Asphalt (HMA) layer, pavement cross-section adequacy and accumulated damage determination over the service life. To implement these steps, Falling Weight Deflectometer (FWD) test has been conducted on the airfields of selected airports all over New Mexico. Layer moduli have been backcalculated from the FWD test data by ELMOD. Laboratory indirect tensile test has been conducted on the samples collected from the field coring to measure the indirect tensile stress. In addition, a Finite Element Model (FEM) has been developed in ABAQUS to determine the tensile stress at the bottom of HMA layer. Pavement layer thickness adequacy has been investigated by FAARFIELD. KENLAYER has determined the accumulated damage over the service life. Remaining life has been determined from this accumulated damage. Pavement thickness adequacy investigation shows that most of the pavement sections do not have adequate thickness to withstand the load from aircraft gear. However, comparison between laboratory indirect tensile strength test and determination of tensile stress at the bottom of HMA layer by FEM as well as remaining life calculation show the pavement sections are in good condition.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.