Question

The field density and field moisture content of a soil can be determined by
1. Core cutter method
2. Sand replacement method
3. Proctor compaction test
4. Modified proctor compaction test

• A. 1, 2 , 3 and 4
• B. 1 and 2 only
• C. 2 and 3 only
• D. 2 and 4 only

Answer 1

The correct option is B 1 and 2 only

(b)
Core cutter method: One method of examining the in-situ density of the soil is the core cutter method. This method involves pushing steel rings in the soil to determine the wet and dry volume weight including the water content.
Sand Replacement Method: Determined of field density of cohesion less soil is not possible by core cutter method, because it is not possible to obtain a core sample.In such situation, the sand replacement method is employed to determine the unit weight.
Proctor test: The Proctor test is used to determine the maximum density that can be practically achieved for a soil. The Proctor soil compaction test is performed by measuring the density of the soil being tested at different moisture content points. The aim of the Proctor test is to determine the optimum moisture content for the soil.