Problem:
Calculate the total mass density (Mg/m3) and total unit weight (kN/m3) for a soil whose solids are pure quartz (Gs=2.66). Compare those values with a soil with solids composed of 70% quartz by weight, 20% biotite by weight (Gs=3.00), and 10% iron oxide by weight (Gs=5.40). Both soils are saturated and have void ratios of 0.75. (Hint: Draw two phase diagrams -one for each soil. For the soil containing quartz, biotite, and iron oxide, draws a four-phase diagram consisting of water and three separate solid phases composed of quartz, biotite, and iron oxide?
Note: Explain all steps comprehensively.