Podcast
Questions and Answers
What is the symbol for well graded gravel without fines?
What is the symbol for well graded gravel without fines?
What is the symbol for poorly graded gravel without fines?
What is the symbol for poorly graded gravel without fines?
What is the symbol for well graded sand without fines?
What is the symbol for well graded sand without fines?
What is the symbol for poorly graded sand without fines?
What is the symbol for poorly graded sand without fines?
Signup and view all the answers
What does the letter 'S' symbolize in soil classification?
What does the letter 'S' symbolize in soil classification?
Signup and view all the answers
What does the letter 'G' symbolize in soil classification?
What does the letter 'G' symbolize in soil classification?
Signup and view all the answers
What does the letter 'M' symbolize in soil classification?
What does the letter 'M' symbolize in soil classification?
Signup and view all the answers
What does the letter 'C' symbolize in soil classification?
What does the letter 'C' symbolize in soil classification?
Signup and view all the answers
What does the letter 'O' symbolize in soil classification?
What does the letter 'O' symbolize in soil classification?
Signup and view all the answers
What does the letter 'GM' symbolize in soil classification?
What does the letter 'GM' symbolize in soil classification?
Signup and view all the answers
What does the letter 'GC' symbolize in soil classification?
What does the letter 'GC' symbolize in soil classification?
Signup and view all the answers
What does the letter 'SM' symbolize in soil classification?
What does the letter 'SM' symbolize in soil classification?
Signup and view all the answers
What does the letter 'SC' symbolize in soil classification?
What does the letter 'SC' symbolize in soil classification?
Signup and view all the answers
What does the term 'ML' refer to in soil classification?
What does the term 'ML' refer to in soil classification?
Signup and view all the answers
What does the term 'CL' refer to in soil classification?
What does the term 'CL' refer to in soil classification?
Signup and view all the answers
What does the term 'MH' refer to in soil classification?
What does the term 'MH' refer to in soil classification?
Signup and view all the answers
What does the term 'CH' refer to in soil classification?
What does the term 'CH' refer to in soil classification?
Signup and view all the answers
What is defined as a liquid limit below 50?
What is defined as a liquid limit below 50?
Signup and view all the answers
What is defined as a liquid limit above 50?
What is defined as a liquid limit above 50?
Signup and view all the answers
What does 'OL' symbolize in soil classification?
What does 'OL' symbolize in soil classification?
Signup and view all the answers
What does 'OH' symbolize in soil classification?
What does 'OH' symbolize in soil classification?
Signup and view all the answers
What does 'PT' symbolize in soil classification?
What does 'PT' symbolize in soil classification?
Signup and view all the answers
What sieve defines fines?
What sieve defines fines?
Signup and view all the answers
Describe the grain size curve for a well graded soil.
Describe the grain size curve for a well graded soil.
Signup and view all the answers
Describe the grain size curve for a uniform soil.
Describe the grain size curve for a uniform soil.
Signup and view all the answers
Describe the grain size curve where a certain grain size is absent.
Describe the grain size curve where a certain grain size is absent.
Signup and view all the answers
How do you calculate the coefficient of uniformity?
How do you calculate the coefficient of uniformity?
Signup and view all the answers
How do you calculate the curvature coefficient?
How do you calculate the curvature coefficient?
Signup and view all the answers
What does the term 'dilatancy' refer to?
What does the term 'dilatancy' refer to?
Signup and view all the answers
What does 'dry strength' refer to?
What does 'dry strength' refer to?
Signup and view all the answers
What does 'toughness' refer to in soil classification?
What does 'toughness' refer to in soil classification?
Signup and view all the answers
Study Notes
Unified Soil Classification System Symbols
- GW: Well graded gravel without fines
- GP: Poorly graded gravel without fines
- SW: Well graded sand without fines
- SP: Poorly graded sand without fines
- S: Represents sand
- G: Represents gravel
- M: Represents silt
- C: Represents clay
- O: Represents organic silts or clays
Types of Mixed Soils
- GM: Silty-gravels
- GC: Clayey-gravels
- SM: Silty sand
- SC: Clayey sand
Soil Plasticity Classifications
- ML: Silt with low plasticity
- CL: Clays with low to medium plasticity
- MH: Plastic silts
- CH: Clays with high plasticity
- OL: Organic silt-clays of low plasticity
- OH: Organic clays of high plasticity
- PT: Peat and highly organic soil
Sieve Analysis
- 200 sieve defines fines in soil particle size distribution.
Grain Size Distribution Curves
- Well graded soil curve: Wide grain size distribution.
- Uniform soil curve: Narrow grain size distribution.
- Curves with two humps and a flat area indicate an absent grain size.
Coefficients Calculation
- Coefficient of uniformity is calculated as D60/D10.
- Curvature coefficient is determined by the formula D30 squared / (D10 × D60).
Soil Behavior Characteristics
- Dilatancy: Describes soil's reaction to shaking.
- Dry strength: Assessed by crushing dried samples with fingers.
- Toughness: Evaluated by consistency near the plastic limit, often tested by rolling into worms.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on the Unified Soil Classification System and various soil types. This quiz covers soil symbols, plasticity classifications, and sieve analysis concepts. Perfect for students and professionals in soil science and engineering.
