Geotechnical appraisal of failed sections of some highway pavements in parts of Northcentral Nigeria

Author:

Akudo Ernest Orji,Aigbadon Godwin Okumagbe,Musa Kizito O.,Baba Aminu Muawiya,Changde Nanfa Andrew,Adekunle Emmanuel K.

Abstract

Purpose The purpose of this study was to investigate the likely causes of failure of some sections of road pavements in Ajaokuta, Northcentral Nigeria. This was achieved through a geotechnical assessment of subgrade soils in affected areas. Design/methodology/approach The methods entailed field and laboratory methods and statistical analysis. Subgrade soil samples were retrieved from a depth of 1,000 mm beneath the failed portions using a hang auger. The soils were analyzed for natural moisture content (NMC), Atterberg limit (liquid limit, plastic limit and linear shrinkage), grain size distribution, compaction and California bearing ratio (CBR), respectively. Findings The results of the geotechnical tests ranged from NMC (12.5%–19.4%), sand (84%–98%), fines (2%–16%), LL (16.0%–32.2%), PL (17%–27.5%), LS (2.7%–6.4%), PI (2.5%–18.4%), maximum dry density (1756 kg/m2–1961 kg/m2), optimum moisture content (13.2%–20.2%), unsoaked CBR (15.5%–30.5%) and soaked CBR (8%–22%), respectively. Pearson’s correlation coefficient performed on the variables showed that some parameters exhibited a strong positive correlation with r2 > 0.5. Research limitations/implications Funding was the main limitation. Originality/value Comparing the results with Nigerian standards for road construction, and the AASHTO classification scheme, the subgrade soils are competent and possess excellent to good properties. The soils also exhibited very low plasticity, a high percentage of sand, high CBR and low NMC, which implies that it has the strength required for road pavement subgrades. The likely causes of the failures are, therefore, due to the use of poor construction materials, technical incompetence and poor compaction of sub-base materials, respectively.

Publisher

Emerald

Reference68 articles.

1. Geotechnical studies of causes of failure of some sections of farin gada – zabolo road, Jos- Plateau, North Central Nigeria;Bima Journal of Science and Technology,2021

2. Ground variation, geotechnical uncertainties and reliability of foundation design for sustainable building infrastructures with case histories;Journal of Material Sciences and Engineering Technology,2023

3. Landslide susceptibility assessment of Calabar, Nigeria using geotechnical, remote sensing and multi- criteria decision analysis: implications for urban planning and development;SDRP Journal of Earth Sciences & Environmental Studies,2019

4. Geotechnical study of lateritic soil in tipper garage, Katampe area, Abuja, federal Capital Territory;Academic Research Sciences, Technology & Engineering,2016

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