1.1.1. Logarithm of time method

Try these first

1. 1.

   What does the coefficient of consolidation (Cv) represent?

   Hint

   Think about how soil reacts to pressure.

2. 2.

   Define 0% consolidation.

   Hint

   Consider what happens before any weight is applied.

3. 3.

   What is the purpose of the Logarithm of Time method?

   • To measure soil density
   • To determine the coefficient of consolidation
   • To assess soil color

   Hint

   Think about why we measure consolidation in soil.

4. 4.

   Is 0% consolidation a pre-loading state?

   • True
   • False

   Hint

   Remember what happens before any load is applied.

5. 5.

   If a soil sample experiences a loading of 50 kPa and the dial reading changes from 3.0 mm to 4.5 mm in time intervals t1=1 hour and t2=4 hours, calculate the coefficient of consolidation.

   Hint

   Focus on finding H first, then using the correct times.

6. 6.

   You plotted your data and the primary and secondary lines intersect after 6 hours. If the dial readings correspond to 8 and 12 at those times respectively, what can you infer about the soil's consolidation?

   Hint

   Consider how readings reflect soil stability over time under load.