EFFECTS OF MECHANICALLY STABILIZED GRADED ASSORTED COARSE-GRAINED SOILS IN THE PERFORMANCE OF UNPAVED ROAD: A CASE STUDY IN GOFFA ZONE, SAWLA AREA

Edire Erko Esho; Emer Tucay Quezon; Democracy Dila

doi:10.29121/granthaalayah.v7.i8.2019.647

Authors

Edire Erko Esho Road & Transport Engineering Stream, Arba Minch Institute of Technology, Ethiopia
Prof. Emer Tucay Quezon Civil & Construction Engineering and Management Streams, Institute of Technology, Ambo University, P.O Box. 019, Ambo, Oromia Region, Ethiopia
Democracy Dila Faculty of Civil Engineering Department, Arba Minch Institute of Technology, Ethiopia

DOI:

https://doi.org/10.29121/granthaalayah.v7.i8.2019.647

Keywords:

Graded Assorted Natural Gravel, Index Properties, Mechanical Stabilization, Soaked CBR Value, Unpaved Road

Abstract [English]

Road network development in Ethiopia is booming, radiating from Addis Ababa towards North-South directions, and East-West directions, due to the good economic growth of the country. However, there are challenges always facing by the pavement designers, and materials engineers for every road project, specifically the unpaved roads in Goffa Zone. It was because, most parts of the existing unpaved road sections within the study area are heavily damaged, and lack of proper maintenance. The source of good quality of sub-base course materials limited and becoming depleted. It is for this reason that the research study focused on the investigation of the effects of mechanically stabilized graded assorted coarse-grained soils. Disturbed and undisturbed samples from different quarry sites were considered and tested in the laboratory. Laboratory test for each location performed, and the results served as control values of the engineering properties of natural soils. The Disturbed samples tested for Gradation, Atterberg's Liquid Limit Tests, and Compaction, while, the undisturbed sample tested for the CBR strength, using ASTM manual. The results of the assorted materials for the sub-base course was analyzed and compared with the AASHTO and ERA Standard Specifications.

Downloads

Download data is not yet available.

References

Trh 20 South Africa, (1990). The Structural Design, Construction, and Maintenance of Unpaved Roads Draft.

J R Cook & C S Gourley TRL Ltd, UK a Framework for the Appropriate Use of Marginal Materials.

Team Leader, Central Laboratory Ethiopian Road Authority (November 2010). Experimental Treatment Options for Expansive Soils on Unpaved Roads in Ethiopia Addis Ababa.

Berkshire Regional Planning Commission, Dunham Mall, Pittsfield, (MA2010). The Massachusetts Unpaved Roads BMP manual,

Zikmund Rakowski, Jacek Kawale (1981). Mechanically Stabilized Layers in Road Construction Tensar International, UK, Technical University of Silesia.

Yibas Mamuye, Emer Tucay Quezon, Anteneh Geremew (2018). Combined Effects of Molasses-Lime Treatment of Poor Quality Natural Gravel Materials Used for Sub-Base and Base Course Construction; GSJ Vol. 6(7), 621-633.

Almaz Ejeta, Emer Tucay Quezon, Kabtamu Getachew (2017). Engineering Properties of Mechanically Stabilized Sub-base Material Using Natural Gravel around Jimma Quarry Sites for Unpaved Road Construction; GSJ Vol. 5(5), 93-104.

Department for International Development (DFID) (2000) Stabilized Sub-Bases for Heavily Trafficked Roads

ERA (2002). Standard Technical Specification Sub-base Road Base and Gravel Wearing Course.

AASHTO Standard Specification for Transportation Materials and Methods of Sampling and Testing.1993. (Twenty-first edition 2001 (Part 1).

AASHTO. Standard Specification for Transportation Materials and Methods of Sampling and Testing.1993. (Twenty-first edition 2001 (Part 2)

Poland. F. P. Henning, G. J. Giumarra and D. C. Roux (June 2008). Deterioration Modeling, Gravel Loss, Gravel Roads, Maintenance, Maintenance Guidelines, Shape Factor, Unsealed Roads.

Rapid Response Research Service (June 2009). Environmental Considerations for Dust Control Measures,

Department for International Development (DFID) (2000). Design of Stabilized Sub-Bases for Heavily Trafficked Roads

Transport Research Laboratory, UK. (1982). International Road maintenance handbook. France, Germany and the United Kingdom. Volume II of IV unpaved road.

Alemgena Alene ARAYA (2011). Characterization of Unbound Granular Materials for Pavements.

Fed ERA (2011). The Democratic Republic Ethiopian Road Authority; Manual Low Volume Traffic.

Ozark, Higrans office Blvasuite (2011). Better Unpaved Road for Nature and People.

D. Jones, A. Rahim, S. Saadeh, and J.T. Harvey (May 4, 2012) Guidelines for stabilization of subgrade soil in California.

ERA (2002). Pavement Design Manual Volume I-2002 (Flexible Pavements and Gravel Roads).