In this paper the role of Atterberg limits and clay content on parameters of soil compaction is examined. The effect of both Atterberg limits and clay content on Proctor maximum dry density and optimum moisture content are determined quantitatively. Using curve fitting techniques empirical equations are derived and charts are prepared.
From these charts it is possible to estimate the potential optimum moisture content and maximum dry density for standard Proctor compaction from the knowledge of both liquid limit and clay content and less accurately from the knowledge of liquid limit only. The chart shown in Fig. 8 is used when only liquid limit is known and the chart in Fig. 13 is used when both liquid limit and clay content are known.