The optimum lime content for stabilizing a problematic clayey soil is typically determined based on
- AEades and Grim pH testCorrect
- BSoil classification
- CPlastic limit
- DLiquid limit
Solution
Concept
Eades and Grim pH Test
Formula
No standard mathematical formula exists for this test.
Step-by-step solution
This is a theoretical question that does not require numerical calculation. Solution step: - Identify the standard laboratory test used to determine the minimum lime required to satisfy soil-lime reactions, which is the Eades and Grim pH test (pH = 12.4). - Select Option A.
Explanation
The Eades and Grim pH test determines the optimum lime content by measuring the pH of a soil-lime mixture. Adding lime increases the soil's pH, and when the pH reaches 12.4, it shows that the soil's immediate chemical demand for lime is satisfied, allowing for proper long-term stabilization and strength development.
Shortcut
Associate "Lime" with "pH" and "Eades" (think "Lime reduces acidity, so test pH with Eades & Grim").
Common mistake
Many students mistakenly select Plastic Limit or Liquid Limit, confusing lime demand for stabilization with general index properties and Atterberg limits of clayey soil.
Correct answer: A) Eades and Grim pH test