ABSTRACT
Dry unit weight (21.3)
In Eq. (21.3), since G s
and Yw' remain constant for a particular soil, the dry unit weight is a function of water content for any assumed degree of saturation. If S = 1, the soil is fully saturated (zero air voids). A curve giving the relationship between Yd and w may be drawn by making use of Eq. (20.3) for S = 1. Curves may be drawn for different degrees of saturation such as 95, 90,80 etc
Figure 21.3 Block diagram for determining zero air voids line
percents. Fig. 21.2 gives typical curves for different degrees of saturation along with moisture-dry unit weight curves obtained by different compactive efforts.
