Question

Soils Mechanics

Assignment 3 1. In a liquid limit test on a fine-grained soil, using the Casagrande apparatus, the following results were recorded: Test # 2 Number of blows 40 30 23 Container number c19 c10 c20 Wet soil + container 93.49 92.5 92.3 87.5 Dry soil + container 90.76 90.53 89.36 85.95 Container mass 84.16 86.1 83.12 82.79 dry soil moisture loss Moisture content, w% If the plastic limit on the same soil was found to be 25% determine the liquid limit and plasticity index of the soil.

Answer 1

liquid limit = 46.35 %

plastic index = 21.35 %

Answer Test Number of BIOWA 40 19 container Number C19 CTO 162o [c2 wet soil + container 93-49 | 92.5 92.3 87-5 Dry soilt container 90.76 90-53 69136 85.95 container muss 84.16 861 83.12 82.79 dry soil 4.43 6:24 13:16 moisture loss | 2.73 T 1.37 2.94 1.55 moisture content wy) 41367. 44.467 47.11 49.05 Liquid limit at 25 Blowl. 4711 44.46 23 25 30 LiLs 44.46 + 1-892 LiL's 46-35 Ansver Given PLC254. Plastic index: 46'35-25 P.I. -21.35 / Answer