Impact of moderate and high-temperature cyclic heating on lateritic soil properties
| dc.contributor.author | Olubunmi Oluwadare Owoyemi | |
| dc.contributor.author | Lekan Olatayo Afolagboye | |
| dc.contributor.author | Megan Welman-Purchase | |
| dc.contributor.author | Charles Adebayo Oyelami | |
| dc.date.accessioned | 2026-04-23T08:32:09Z | |
| dc.date.available | 2026-04-23T08:32:09Z | |
| dc.date.issued | 2026-11-26 | |
| dc.description.abstract | This study examines the effects of cyclic moderate and high-temperature heating on the mineralogical, microstructural, and geotechnical properties of lateritic soils. Residual soils from Akerebiata (AK) and Ipetu (IP), southwestern Nigeria, were subjected to five heating–cooling cycles at 300 °C and 500 °C, using a heating rate of 5 °C/min. Mineralogical and microstructural changes were evaluated using X-ray diffraction (XRD) and scanning electron microscopy (SEM), while geotechnical properties were assessed using standard laboratory tests and supported by one-way and two-way ANOVA with Tukey’s HSD post-hoc analysis. Cyclic heating caused significant mineralogical alteration in the feldspar-rich AK soil, marked by a reduction in plagioclase and an increase in quartz content. In contrast, the kaolinite quartz-dominated IP soil remained largely mineralogically stable. SEM observations revealed progressive particle agglomeration in both soils and particularly more pronounced at 500 °C. Bulk density decreased significantly with increasing temperature and number of cycles, with cumulative reductions of up to 9.8% for AK soil and 7.6% for IP soil after five cycles at 500 °C. Atterberg limits decreased consistently with thermal cycling, accompanied by a reduction in fines and a corresponding increase in sand-sized particles. Swell potential decreased sharply after the first heating cycle and showed little change thereafter, while collapse potential decreased by more than 50% after initial heating, with no consistent trend in subsequent cycles. Unconfined compressive strength decreased significantly for both soils, with strength loss more pronounced in IP soil (up to 97% at 500 °C) than in AK soil (up to 59%). Overall, the results show that cyclic heating induces irreversible changes in lateritic soils, with the extent and persistence of change controlled by mineral composition, temperature level, and heating history. These findings are relevant to the engineering assessment of soils exposed to high-temperature events such as wildfires and thermal remediation. | |
| dc.identifier.issn | Print ISSN: 2364-4176 | Online ISSN: 2364-4184 | |
| dc.identifier.uri | https://kwasuspace.kwasu.edu.ng/handle/123456789/6672 | |
| dc.publisher | Springer international Publishing | |
| dc.title | Impact of moderate and high-temperature cyclic heating on lateritic soil properties |