Advanced characterization of unbound granular materials for pavement structural design in Egypt
Currently, Egypt is using the "AASHTO, 1993. Guide for Design of Pavement Structures. Washington, DC: American Association of State Highway and Transportation Officials" guide for the flexible pavement structural design. In this method the resilient modulus (MR) of the unbound granular base/subbase materials and subgrade soils is a measure of material stiffness used for characterisation. It is considered one of the major factors affecting the pavement layer thicknesses. However, in Egypt, California Bearing Ratio (CBR) is the main strength parameter used for characterisation of the unbound materials and subgrade soils due to its availability and simplicity. In this research, a comprehensive experimental testing programme was conducted on different unbound granular base/subbase materials typically used in pavement construction projects in Egypt. The testing programme includes MR, CBR, and basic material properties. The effect of aggregate gradation on MR is investigated. A model predicting MR as a function of the basic material properties is proposed. The MR–CBR relationship adopted in the current Egyptian Code of Practice is verified based on the testing results. The experimental data warranted the calibration of the current model. The calibrated model has reasonable goodness of fit statistics and yields rational MR estimates for the local materials.
- Record URL:
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/44544515
-
Supplemental Notes:
- © 2020 Informa UK Limited, trading as Taylor & Francis Group. Abstract reprinted with permission of Taylor & Francis.
-
Authors:
- El-Ashwah, Ahmed S
- Mousa, Eman
- El-Badawy, Sherif M
-
0000-0001-8348-1580
- Abo-Hashema, Mostafa A
- Publication Date: 2022-1
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp 476-488
-
Serial:
- International Journal of Pavement Engineering
- Volume: 23
- Issue Number: 2
- Publisher: Taylor & Francis
- ISSN: 1029-8436
- Serial URL: http://www.tandf.co.uk/journals/titles/10298436.html
Subject/Index Terms
- TRT Terms: Aggregate gradation; Base course (Pavements); California bearing ratio; Flexible pavements; Granular materials; Local materials; Modulus of resilience; Pavement design; Subbase (Pavements); Subgrade (Pavements)
- Identifier Terms: AASHTO Guide for Design of Pavement Structures
- Geographic Terms: Egypt
- Subject Areas: Highways; Materials; Pavements;
Filing Info
- Accession Number: 01835082
- Record Type: Publication
- Files: TRIS
- Created Date: Jan 31 2022 4:17PM