Investigating the Suitability of Selected Granitic Rocks in Kogi State for the Production of Dimension Stone
Abstract
This study evaluates the geological and geotechnical characteristics of some selected granite rocks in Kogi state, Nigeria to determine their suitability for dimension stone production. Field mapping, sampling and laboratory tests (petrographic analysis, uniaxial compressive strength, water absorption, porosity and durability tests) and fracture network were conducted on samples collected from selected Quarry sites; Itakpe Quarry, CGC Quarry and Gitto Quarry in Kogi state. The results show that the granite rocks possess suitable physical and mechanical properties, including high compressive strength (90 -110mpa), low water absorption (0.269- 1.20%) and good durability, with average joint spacing (1m to 2.57m). petrographic analysis reveals a predominantly Quartz-feldspathic composition with minimal weathering. The study concludes that the granite rocks in Kogi state meet the international standards for dimension stone production, making them suitable for use as construction material, architectural stone, and monumental stone. Of the three studied deposits, Itakpe and Gitto deposits was classified as having the highest potential for producing dimension stone. The compressive stress and geological feature are found to be the controlling factors in the classification of dimension stone. The Itakpe and Gitto quarries has dense, grey to dark grey pink to reddish-pink polishable non crystalline granitic rock. Quarry shows intensive fracturing and brittles, which makes their use as slab cutting and dimension stone production difficult. The findings of this research will contribute to the development of the dimension stone industry in Nigeria, provide valuable information for Quarry operators and construction companies, and promote sustainable exploitation of Nigeria natural resources.
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