Petrography and Geotechnical Evaluation of Syenite Aggregate Around Igarra, Southwestern Nigeria, for Pavement Construction

Petrography and Geotechnical Evaluation of Syenite Aggregate Around Igarra, Southwestern Nigeria, for Pavement Construction
  IJETT-book-cover           
  
© 2023 by IJETT Journal
Volume-71 Issue-5
Year of Publication : 2023
Author : Felix Chukwuka Ugbe, Israel Aruoriwo Abiodun Etobro, Omabehere Innocent Ejeh, Abimbola Akano, Emmanuel Anthony Emioge
DOI : 10.14445/22315381/IJETT-V71I5P241

How to Cite?

Felix Chukwuka Ugbe, Israel Aruoriwo Abiodun Etobro, Omabehere Innocent Ejeh, Abimbola Akano, Emmanuel Anthony Emioge , "Petrography and Geotechnical Evaluation of Syenite Aggregate Around Igarra, Southwestern Nigeria, for Pavement Construction," International Journal of Engineering Trends and Technology, vol. 71, no. 5, pp. 415-421, 2023. Crossref, https://doi.org/10.14445/22315381/IJETT-V71I5P241

Abstract
Ten rock outcrop samples were obtained in an attempt to determine the relationship between the petrography and the geotechnical properties of the Syenite around Igarra, Southwestern Nigeria, using thin-section petrography and geotechnical analyses of rock aggregates, respectively. The result of the modal analysis shows the average mineral composition in the sample as 9.9 % plagioclase, 7.6 % quartz, 18.6 % biotite, 11.6 % hornblende, 12.2 % muscovite, 39.5 % microcline, and 0.6 % opaque. The rock samples are mostly holocrystalline of equi-granular fine-medium-grained crystals, with a minor presence of interlocking texture with euhedral to subhedral grains and perthite with interlocking euhedral to subhedral grains in some samples. All the aggregates are strong and durable for pavement construction, as they largely meet the low acceptance values of >2.55%, < 1%, <35%, <35%, and <35% required for specific gravity, water absorption capacity, aggregate impact values, aggregate crushing values, and Los Angeles Abrasion values respectively. However, acceptance values of <30% for the flakiness index and <30% elongation index were not attained. It was observed that mica contents have a negative correlation with strength.

Keywords
Aggregates, Geotechnical, Pavements, Petrography, Syenite.

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