Unified soil classification system (USCS) was developed by____________
In 1940, casagrande originally developed the unified soil classification system (USCS).
The USCS system was used for which of the following purpose during World War 2?
In earlier stages of World War 2, the USCS system was used for air field construction.
According to USCS, the fined grained soil are classified on the basis of_____________
According to USCS the fine grained soils, whose behavior is controlled by plasticity, are classified on the basis of their plasticity.
By USCS system, soil are classified in to___________Major groups.
Various soil are classified in to four major groups
1. Coarse grained
2. Fine grained
3. Organic soils
A soil is considered as coarse grained, if it retains more than___________in a sieve.
If more than 50 % of the soil is retained on a NO.200 US sieve (0.075), it is designated as coarse grained soil.
Coarse grained soils, containing fines between 5-12%, are designated by___________Symbol.
If the percentage of fines lies between 5 to 12 %, coarse grained soils are designated by dual symbols GW-GM or SP-SM.
Fine grained soil are sub divided in to___________
Based on their liquid limit and plasticity index, fine grained soil are subdivided in to silt and clay
Fine grained soil are subdivided based on___________
Based on the liquid limit and plasticity index, fine grained soil is subdivided.
Coarse grained soil is sub-divided in to_______________
Based on the soil size, coarse grained soil is divided in to gravel and sand.
In Casagrande’s plasticity chart, the numbers in the chart denotes____________
In Casagrande’s plasticity chart, the numbers denote relative suitability with No.1 as the best and No. 10 as the worst.