The index properties of the sand and clay used for the study are summarized in Table 1 while Figure 1 shows theirparticle size distribution. The sand was well graded and classified in zone 1 according to BS 882 (1983), and it isin agreement with the provisions of BS 1377 (1990) for clean quartz and flint sands. An investigation into thegeotechnical and engineering properties of sample as well as study of soil maps of Nigeria based on the findingsof Akinola (1982) indicated that the sample used by the study belong to the group of ferruginous tropical soilsderived from acid igneous and metamorphic rocks.
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