Soil Classification Flashcards
The most common engineering classification system for soils in north america.
Unified Soil Classification System(USCS)
Has 3 major classification groups:
•Coarse Grain Soil (sand, and gravels etc)
•Fine-Grained Soil(silt and clays etc)
•Highly Organic Soils (peat)
In the Unified soil classification system, what is the classification of soil such as sand, and gravel?
Coarse grained soil
In the Unified soil classification system, what is the classification of soil such as silt?
Fine-grained soil
In the Unified soil classification system, what is the classification of peat.
Highly organic soils
What are the subdivisions of the Coarse-grained soils?
Well-graded and poorly-graded
What are the subdivisions of the Fine-grained soils?
High-plasticity and low-plasticity and moderately organic soil
How are silt and clays distinguished in the USCS?
By Atterberg limits
The european has its own soil classification system, what is it called?
European Soil Classification system
In the European Soil Classification System what is added in the classification of soils and clays?
Intermediate-Plasticity
This soil classification system classifies soils and aggregates relative to their suitability for pavement construction, and modified Burmister System
AASHTO Soil Classification System
The USCS and additional engineering descriptions are standardized in ____________.
ASTM D 2487
The US _________ Requires the classification of soils to protect workers from injury when working in excavations and trenches.
Occupational safety and health administration.
What are the soil classifications that the Occupational Safety And Health Administration uses?
•Stable Rocks
•Type A
•Type B
•Type C
•Type C60
Natural solid mineral matter that can be excavated with vertical sides and remain intact while exposed.
Stable Rocks
Cohesive plastic soils with unconfined compressive strength grester than 1.5 ton per square foot and meeting several other requirements.
Type A
