5 Questions
What property of soils is indicated by the Plasticity Index?
Clay content
What test is used to determine the potential strength of soil/aggregates?
CBR Test
What is the recommended thickness range for Hot Mix Asphalt Overlay?
3” to 5”
Which value indicates poor engineering material for soils?
Liquid Limit of Fines
What material should be free from hard lumps and not contain more than 15% material retained on the No. 4 sieve in sub-base and base course?
Filler Material
Study Notes
Soil Properties
- The Plasticity Index indicates the degree of plasticity of a soil, which is a measure of how much water a soil can absorb before it becomes plastic.
Soil Testing
- The Unconfined Compression Test (UCT) is used to determine the potential strength of soil and aggregates.
Asphalt Overlay
- The recommended thickness range for Hot Mix Asphalt (HMA) Overlay is typically between 1.5 to 5 inches (38 to 127 mm).
Soil Quality
- A value of 0-3 on the Plasticity Index (PI) indicates poor engineering material for soils.
Aggregate Quality
- Aggregates used in sub-base and base courses should be free from hard lumps and contain no more than 15% material retained on the No. 4 sieve.
Test your knowledge of civil engineering materials with this quiz! From gradation to asphalt overlay thickness, challenge yourself with questions on important concepts and specifications in civil engineering.
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