5. The unit weight, also known as the 'weight density', of a soil refers to its weight per cubic metre and is typically expressed as kilonewtons per cubic metre (kN/m3), or tons per cubic metre (t/m3)1. Soil Mechanics And Foundation Engineering by K R Arora 2. d = current dry unit weight of soil in-situ ( d) min = dry unit weight of the soil at its loosest condition ( d) max = dry unit weight of the soil at its densest condition Designation of Granular Soil Based on Relative Density Tags: Unit Weight Derivation of Formula bulk unit weight Buoyant Unit Weight of Soil dry unit weight moist unit weight Free Download eBooks, Notes, Templates, etc. Relative density is an index that quantifies the state of compactness between the loosest and densest possible state of coarse-grained soils. Soil Unit Weight (pcf) Ka Coefficient of Active Earth Pressure K: w =K: a: . @import url(http://www.google.com/cse/api/branding.css);