5.3.2.2. Curvature Coefficient

Try these first

1. 1.

   Define curvature coefficient.

   Hint

   Think about how it affects soil classification.

2. 2.

   What does D10 represent?

   Hint

   Consider the percentages related to particle sizes.

3. 3.

   What is the formula to calculate the curvature coefficient?

   • C_c = (D30^2) / (D10 * D60)
   • C_c = (D10^2) + (D30 * D60)
   • C_c = (D60 - D30)/D10

   Hint

   Look for the formula that uses squared and multiplied terms.

4. 4.

   True or False: A curvature coefficient less than 1 indicates a well-graded soil.

   • True
   • False

   Hint

   Remember what grading characteristics indicate.

5. 5.

   A soil sample shows D10 = 0.15 mm, D30 = 0.45 mm, and D60 = 0.95 mm. Calculate the curvature coefficient and interpret its significance.

   Hint

   Make sure to pay attention to the values given as they lead to the calculation.

6. 6.

   Discuss the relevance of particle size distribution in the context of a construction project. Provide examples of how different grading can impact engineering decisions.

   Hint

   Think about how soil interacts with structures.