Podcast
Questions and Answers
Which acronym refers to the organization responsible for establishing standards in highway transportation?
Which acronym refers to the organization responsible for establishing standards in highway transportation?
According to the AASHTO Soil Classification System, which particle size is classified as gravel?
According to the AASHTO Soil Classification System, which particle size is classified as gravel?
What is NOT a type of termite proofing mentioned in the content?
What is NOT a type of termite proofing mentioned in the content?
Which of the following geosynthetics helps in erosion control by adding stability to soil?
Which of the following geosynthetics helps in erosion control by adding stability to soil?
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Which material is classified as a coarser material than fine sand according to the AASHTO classification?
Which material is classified as a coarser material than fine sand according to the AASHTO classification?
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Which of the following termite proofing methods is classified as a physical barrier?
Which of the following termite proofing methods is classified as a physical barrier?
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What moisture content defines the Liquid Limit (LL) of a soil?
What moisture content defines the Liquid Limit (LL) of a soil?
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What does the Plasticity Index (PI) indicate in soil mechanics?
What does the Plasticity Index (PI) indicate in soil mechanics?
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Which of the following materials is classified as a fill material under the Unified Soil Classification System (USCS)?
Which of the following materials is classified as a fill material under the Unified Soil Classification System (USCS)?
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Which termite proofing method uses a chemical barrier?
Which termite proofing method uses a chemical barrier?
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What occurs when soil reaches its Plastic Limit (PL)?
What occurs when soil reaches its Plastic Limit (PL)?
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Study Notes
Earthworks
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Acronyms:
- AASHTO: American Association of State Highway and Transportation Officials
- ANSI: American Nurserymen’s Specifications Institute
- ASTM: American Society for Testing Materials
- DPWH: Department of Public Works and Highways (Philippines)
- USCS: Unified Soil Classification System
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Definitions and Standard Tests:
- AASHTO Soil Classification System classifies inorganic soils for subgrade suitability based on drainage and bearing capacity.
- Particle sizes defined by AASHTO include:
- Boulders: > 75 mm
- Gravel: 75 mm to No.10 sieve
- Coarse Sand: No.10 to No.40 sieve
- Fine Sand: No.40 to No.200 sieve
- Silt-Clay: passing No.200 sieve
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Atterberg Limits:
- Tests on soils passing No.40 sieve determine:
- Liquid Limit (LL): moisture content where soil transitions from liquid to plastic state.
- Plastic Limit (PL): water content at which soil starts to crumble when rolled to 3.2 mm.
- Plasticity Index (PI): PI = LL - PL, indicating the moisture range over which soil behaves plastically.
- Tests on soils passing No.40 sieve determine:
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Fill Materials:
- Used to elevate grades or as compacted deposits, include soil, crushed stone, and sand.
- Classified under USCS as GW, GM, GP (gravels) and SW, SM (sands).
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Borrow Fill:
- Selected laboratory-approved pit-run gravel or similar materials with < 35% passing the No.200 sieve.
Termite and Bukbok Proofing
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Methods:
- Physical Barrier: Allows for moisture management.
- Chemical Barrier: Provides treatment to deter termites.
- Bait System: Attracts and eliminates termites from the area.
Roads and Parking
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Subgrade and Base Course Materials:
- Ensures stability and support for surfaces.
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Surface Paving Material:
- Final layer material that interacts with vehicle traffic and weather.
Riprap (Rock Lining)
- Defined as layered stone used to prevent erosion and scouring of structures or embankments.
- Subject to considerable energy, must be sound and free of defects.
- Gradation ranges from 2 inches to 42 inches in diameter to resist displacement from moving water.
Gabion System
- Composed of wire-enclosed riprap; constructed from wire mesh filled with small riprap.
- Used to reinforce slopes and protect areas from erosion.
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Description
This quiz covers foundational concepts in sitework, particularly focusing on earthworks in building technology. Key topics include definitions, tests, and various materials such as geosynthetics and riprap. Test your knowledge of essential acronyms and standard practices in the field.
