Variation in bulk density of granitic rock samples at mild temperature range
| dc.contributor.author | Lekan Olatayo Afolagboye | |
| dc.contributor.author | Adenike Helen Adedeji | |
| dc.contributor.author | Olubunmi Oluwadare Owoyemi | |
| dc.contributor.author | Yusuf Ademola Abdu-Raheem | |
| dc.date.accessioned | 2026-04-23T08:32:17Z | |
| dc.date.available | 2026-04-23T08:32:17Z | |
| dc.date.issued | 2025-12-23 | |
| dc.description.abstract | Numerous laboratory investigations have explored the properties of various rocks subjected to high temperatures rarely encountered in rock engineering applications. This study investigates investigate the variation in bulk density of fine-grained granite (FGG) under mild temperatures (20°C–200°C), relevant to rock engineering applications such as geothermal systems and radioactive waste storage. The objectives are to quantify changes in mass, volume, and bulk density of FGG samples and identify underlying mechanisms through microscopic analysis. Cylindrical core samples (50 mm diameter × 100 mm height) were extracted from a granite outcrop in Ado-Ekiti, southwestern Nigeria, with a core drilling machine, following ISRM standards. Mass and volume were measured before, during, and after heating at 20°C intervals up to 200°C in an electric oven. Bulk density was calculated using ISRM standards based on the measured mass and volume at selected mild temperature intervals. Results show a decrease in mass and an increase in volume with rising temperature, leading to a reduction in bulk density. The average percentage of mass loss,volume increase, and bulk density decrease was higher during heating than after cooling. In addition, microscopic analysis indicated a progressive increase in microcrack density, with distinct trans-granular cracks forming across feldspar grains at 200 °C. The findings reveal the potential impact of mild thermal exposure on granite’s structural integrity, which is relevant for rock engineering applications in environments subject to moderate thermal fluctuations. | |
| dc.identifier.citation | 2. Afolagboye, L. O., Adedeji, A. H., Owoyemi, O. O., & Abdu-Raheem, Y. A. (2025). Variation in bulk density of granitic rock samples at mild temperature range. International Journal of Mining and Geo-Engineering, 59(4), 349–356. Published by University of Tehran. Available online at https://doi.org/10.22059/IJMGE.2025.370522.595137 | |
| dc.identifier.issn | 1532-0383 | |
| dc.identifier.uri | https://kwasuspace.kwasu.edu.ng/handle/123456789/6673 | |
| dc.publisher | Published by University of Tehran. | |
| dc.title | Variation in bulk density of granitic rock samples at mild temperature range |