Investigation of Geotechnical Parameters of Sandstone in Banda, Kogi State, Nigeria Using Regression Model

Abstract

The study investigated geotechnical parameters of sandstone in Banda, Kogi State, Nigeria using regression model. To achieve the set objectives, in‐ situ tests were carried out by Schmidt hammer and laboratory tests were conducted on the sandstone samples collected from the study area. Five rock samples were prepared for the determination of density and porosity. The results obtained from the Schmidt hammer tests and those of density determined from laboratory tests were used to estimate the uniaxial compressive strength of the investigated rock. Point load index and tensile strength were determined from the laboratory tests and the relationship established by Brook, (1993) respectively. The results of the analyses reveal that the average density of sandstones is 2.08 g/cm3, the average porosity of the tested sandstones is 13.0% while the average uniaxial compressive strength value is 26.3 MPa. The average point load index and that of the tensile strength value are 1.17 MPa and 1.76 MPa respectively. The determined density, porosity, uniaxial compressive strength, point load index and tensile strength were analyzed statistically. From the statistical analysis mathematical models were established. The regression coefficients obtained from the analysis show that there are strong relationships between the physical and mechanical properties of sandstone.