ABSTRACT
Liquid Limit by the Use of Fall Cone Penetrometer Figure 3.14 shows the arrangement of the apparatus. The soil whose liquid limit is to be determined is mixed well into a soft consistency and pressed into the cylindrical mold of 5 cm diameter and 5 cm high. The cone which has a central angle of 31 0 and a total mass of 148 g will be kept free on the surface of the soil. The depth of penetration y of the cone is measured in mm on the graduated scale after 30 sec of penetration. The liquid limit wI may be computed by using the formula,
WI = wy +0.01(25-y)(wy +15) (3.39) where wy is the water content corresponding to the penetration y.
