@article{Audu_Balogun_Adeniji_Musa_2019, title={Effects of Soil Properties and Operational Variables on the Compactibility of a Sandy Loam Soil}, volume={15}, url={https://azojete.com.ng/index.php/azojete/article/view/60}, abstractNote={<p>The evaluation of an empirical equation for the determination of degree of compaction of a sandy loam soil was carried out using seven soil physical properties and four compaction operational variables. The soil used was obtained from a borrow pit in Gombe. Five levels of compactive effort, E/A, using a drop-weight type compactor varying from 107.91 to 539.55 Nm was used to compact each of seven pairs of embankment and slice thicknesses (Z, z respectively) with Z varying from 210 to 450 mm and z from 30 to 210 mm. The developed empirical equation, π<sub>1</sub>&nbsp;= Gπ<sub>2</sub><sup>k</sup>&nbsp;in which π1 is the dimensionless degree of compaction and π<sub>2</sub>&nbsp;is a dimensionless combination of the soil properties and the compaction operational variables, has a very high coefficient of determination, r<sup>2</sup>&nbsp;varying from 98.8% to 98.9%. G and k are each polynomial functions of compactive effort per loading, e<sub>L</sub>. that is, G = α<sub>G</sub>e<sub>L</sub><sup>2</sup>+β<sub>G</sub>&nbsp;e<sub>L</sub>&nbsp;+ λ<sub>G</sub>&nbsp;and k=α<sub>k</sub>e<sub>L</sub><sup>2</sup>+β<sub>k</sub>e<sub>L</sub>+ λ<sub>k</sub>. The values of the respective α, β and λ are highly statistically significant at 99.95 confidence level. The “dependent” variables (G and k) are highly correlated at 99.95% confidence level of statistical significance with the “independent” variable (e<sub>L</sub>). The multivariate expression of the degree of compaction obtained in this study shows that compaction depends, not only on cumulative compactive effort, E/A, but also on the compactive effort per loading (e<sub>L</sub>), embankment and slice thicknesses (Z and z respectively) as well as on easy-to-measure soil properties (i.e. soil texture, soil uniformity coefficient, antecedent soil moisture and antecedent bulk density).</p&gt;}, number={3}, journal={ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT}, author={Audu, D. and Balogun, O. S. and Adeniji, F. A. and Musa, Y.}, year={2019}, month={Sep.}, pages={777-791} }