ABSTRACT
This thesis deals with the study of the relative effectiveness of common stabilizers i.e. cement and lime and a by-product of our Steel Rolling Mills i.e. billet-scales on a natural lateritic soil from the site of Ahrradu Bello University Zaria still under construction. It involves the determination of liquid limit, plastic limit, grading analysis, maximum dry density and CBR values. A tabular and graphical representations were made. From the results of the analysis some conclusions and recommendations were made, which enhance the overall understanding of the physical and engineering behaviour of the group of soil as a highway materials. It was found out that, with 2% of lime, 2% cement and 2% billet-scales the A-2-4 subgroup of soil can be upgraded to a fill material. Again with 4% lime, 2% cement and 6% billet-scales the lateritic soil will meet the CBR requirement as a sub-base material. But only 4% of cement is required to effectively stabilize the A-2-4 sub-group of soil as a base material. And that lime is not an effective means of stabilizing silty-sand and billet-scales cannot be commented as a base material with certainty until higher percentages and/or compactive efforts are tested.