Application of Gum Arabic on the Geotechnical Properties of Subgrade Materials

Wasiu O. Ajagbe; Adebola S. Akolade; Oluwatosin D. Ogunlade; Precious A. Olaomotito; Itunu D. Odunewu; Oluwaseyi O. Alabi

doi:10.14513/actatechjaur.00748

Authors

Wasiu O. Ajagbe Department of Civil Engineering, University of Ibadan, Box 4078, Ibadan 200001, Oyo, Nigeria
Adebola S. Akolade Department of Civil Engineering, Lead City University, 8VGG+PJ8 Toll-Gate Area, Off Oba Otudeko Ave, Ibadan 200255, Oyo, Nigeria
Oluwatosin D. Ogunlade Department of Civil Engineering, University of Ibadan, Box 4078, Ibadan 200001, Oyo, Nigeria
Precious A. Olaomotito Department of Civil Engineering, Lead City University, 8VGG+PJ8 Toll-Gate Area, Off Oba Otudeko Ave, Ibadan 200255, Oyo, Nigeria
Itunu D. Odunewu Department of Civil Engineering, Lead City University, 8VGG+PJ8 Toll-Gate Area, Off Oba Otudeko Ave, Ibadan 200255, Oyo, Nigeria
Oluwaseyi O. Alabi Department of Mechanical Engineering, Lead City University, 8VGG+PJ8 Toll-Gate Area, Off Oba Otudeko Ave, Ibadan 200255, Oyo, Nigeria

DOI:

https://doi.org/10.14513/actatechjaur.00748

Keywords:

Gum Arabic, Subgrade, Road Construction, Soil stabilization, geotechnical properties, CBR

Abstract

This study investigates the impact of Gum Arabic on the geotechnical properties of subgrade soil materials, a non-traditional soil stabilization technique. Given the need for sustainable and locally available alternatives in road construction, the study aims to assess how different percentages of Gum Arabic affect the physical and mechanical behavior of soil. The research aims to provide sustainable and locally available alternatives in road construction. Three soil samples were treated with varying percentages of Gum Arabic, (1.5%, 3%, 6% and 12%), and standard geotechnical tests were conducted under both soaked and unsoaked conditions. The results showed that the average natural moisture content of the soils was 7.9%, 2.2%, and 4.6%. The addition of Gum Arabic increased the peak maximum dry density of the soil samples by 8.02%, 1.88, and 7.88%. The maximum unsoaked California Bearing Ratio (CBR) values of soil samples were 32.1%, 81.7%, and 48.7%, respectively. Whereas, maximum soaked CBR values of soils S1, S2 and S3 obtained at 1.5%, 6% and 1.5% additions of gum Arabic were 8.4%, 28.7% and 16.9% respectively. The study recommends using 3% Gum Arabic to improve the CBR property of soil samples. The application of Gum Arabic showed significant improvements in soil behavior under both soaked and unsoaked conditions.

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