What is BS 1377?
Methods of test for soils for civil engineering purposes – Classification tests and determination of geotechnical properties. Methods of test for soils for civil engineering purposes – Classification tests and determination of geotechnical properties.
What is degree of compaction of soil?
The degree of compaction suitable for root growth is calculated by dividing the critical dry density by the maximum dry density for each type of soil.
How do you calculate degree of soil compaction?
Degree of compaction = Field dry density / maximum dry density determined in the laboratory. For non-cohesive soil, it is some times called density index.
Is code for degree of compaction?
IS : 2720
The method of test based on heavy compaction is covered in IS : 2720 ( Part VIII ).
What is field density test?
Soil field density test measures relative density of soil which has been compacted using compacting equipment and the result of this test is expressed in %. This relative density is measured by comparing maximum dry density obtained from field test with maximum dry density of laboratory test as a standard reference.
How do you carry out a plate bearing test?
The test is usually carried out at foundation level. A load is applied in five increments with readings taken every minute until detectable movement of the plate has stopped. During the test the pressure exerted is added at a consistent rate.
What is maximum dry density of soil?
The maximum peak point of the soil compaction curve obtained is called the Maximum dry density value. The water content corresponds to this point is called the Optimum water content (O.W.C) or optimum moisture content (O.M.C).
What is FDT for soil testing?
Soil field density test (FDT) is a common test conducted in construction work especially the one related to earthwork. In actual condition, site soil backfilling is done layer by layer with each layer compacted with compacting equipment.
What is the CBR value of soil?
CBR is the ratio expressed in percentage of force per unit area required to penetrate a soil mass with a standard circular plunger of 50 mm diameter at the rate of 1.25 mm/min to that required for corresponding penetration in a standard material. The ratio is usually determined for penetration of 2.5 and 5 mm .
Can soil compaction exceed 100%?
This can range from 90 percent to over 100 percent. Modified compaction tests have also been introduced in connection with structures requiring heavier bearing strength to support extremely heavy loads or to limit settlement.
What is 95 Proctor compaction?
For example, specifications often require compaction to be 95 percent of Standard Proctor. This means the on-site soil density must be equal to 95% of the maximum achievable compaction. • Compaction is achieved by applying three basic types of force to the soil mass.