Earthworks Concepts and Materials
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Questions and Answers

Which of the following materials is NOT listed under subgrade and base course materials?

  • Borrow Material
  • Gabion (correct)
  • Choker Aggregate
  • Base Course

    • What is the percentage range of weight passing through a No. 4 sieve for Type 'B' Base Course?

  • 100
  • 20 - 45 (correct)
  • 85 - 100
  • 5 - 12

    • Which termite proofing method uses a physical barrier?

  • Chemical Barrier
  • Moisture Barrier
  • Physical Barrier (correct)
  • Bait System

    • What is the primary purpose of riprap in construction?

    <p>To prevent erosion and scour</p> Signup and view all the answers

    What is the upper limit of weight passing for Choker Aggregate in Type 'B' Base Course?

    <p>100%</p> Signup and view all the answers

    What is the correct weight passing percentage for the No. 200 sieve in the Type 'B' Base Course?

    <p>5 - 12</p> Signup and view all the answers

    In the context of grading requirements, what is a common application of geosynthetics?

    <p>Soil stabilization</p> Signup and view all the answers

    Which of the following types of surfacing is NOT specified in the grading requirements?

    <p>Paving Stones</p> Signup and view all the answers

    What factors influence the resistance of riprap to displacement in water?

    <p>Weight, size, shape, and geometry of the channel</p> Signup and view all the answers

    What type of materials are classified as Borrow Fill?

    <p>Selected laboratory-approved pit-run gravel and disintegrated granite</p> Signup and view all the answers

    Which termite proofing method utilizes wire mesh for support?

    <p>Gabion System</p> Signup and view all the answers

    What is the primary material used in bituminous surfacing?

    <p>Asphalt</p> Signup and view all the answers

    Which method is NOT included in the termite proofing options?

    <p>Structural Reinforcement</p> Signup and view all the answers

    What is a characteristic of Base Course Materials?

    <p>Consists of hard durable fragments of stone</p> Signup and view all the answers

    Which of the following is NOT a type of termite proofing?

    <p>Gabion System</p> Signup and view all the answers

    Which of the following is NOT classified as paving and surfacing material?

    <p>Choker Aggregate</p> Signup and view all the answers

    What defines the choker aggregate in subgrade and base course materials?

    <p>Material that locks smaller aggregates together</p> Signup and view all the answers

    Which barrier option uses a chemical approach for termite control?

    <p>Chemical Barrier</p> Signup and view all the answers

    Which type of surfacing uses cement as its primary binding agent?

    <p>Concrete</p> Signup and view all the answers

    In what applications is gabion used?

    <p>As wire-enclosed rock structures</p> Signup and view all the answers

    What is the purpose of the Choker Aggregate?

    <p>To stabilize the subgrade</p> Signup and view all the answers

    What is the primary purpose of using erosion control materials?

    <p>To reduce soil erosion</p> Signup and view all the answers

    What is defined as materials that help prevent erosion?

    <p>Riprap</p> Signup and view all the answers

    What does the term 'Geosynthetics' refer to in the context of earthworks?

    <p>Synthetic fabric materials used in construction</p> Signup and view all the answers

    What type of material is classified under the subgrade and base course materials?

    <p>Choker Aggregate</p> Signup and view all the answers

    Which system is NOT a method of termite proofing?

    <p>Structural Reinforcement</p> Signup and view all the answers

    What is the primary function of geotextiles in erosion control?

    <p>To filter runoff and provide sediment control</p> Signup and view all the answers

    Which statement correctly describes riprap?

    <p>It serves to protect cut slopes or drainage features.</p> Signup and view all the answers

    Which of the following describes a feature of gabions?

    <p>They consist of wire mesh containers filled with rock.</p> Signup and view all the answers

    What is the purpose of a bait system in termite proofing?

    <p>To attract and eliminate termites</p> Signup and view all the answers

    Which materials fall under the category of paving and surfacing?

    <p>Concrete</p> Signup and view all the answers

    Which option represents a characteristic of a chemical barrier in termite control?

    <p>It involves applying pesticides to the soil.</p> Signup and view all the answers

    What is the main function of geonets in construction?

    <p>Allow in-plane flow capacity</p> Signup and view all the answers

    Which of the following defines geocells?

    <p>Three-dimensional prefabricated polymeric systems that form a mattress</p> Signup and view all the answers

    What does a chemical barrier in termite proofing aim to do?

    <p>Repel or kill termites chemically</p> Signup and view all the answers

    Which material is NOT mentioned as part of the subgrade and base course materials?

    <p>Crushed stone</p> Signup and view all the answers

    What are composite drainage nets (CDNs) characterized by?

    <p>They consist of geonets with bonded geotextile filters</p> Signup and view all the answers

    Which term refers to the materials used above the subgrade in paving applications?

    <p>Base course materials</p> Signup and view all the answers

    In the context of erosion control, what is the primary feature of geosynthetics?

    <p>Their capacity to enhance soil stability</p> Signup and view all the answers

    What does a physical barrier in termite proofing do?

    <p>Block physical access to structures</p> Signup and view all the answers

    Study Notes

    Earthworks (1.0)

    • Acronyms (1.01) are listed but not defined.
    • Definitions and Standard Tests (1.02) are referenced, details needed from external source.
    • Riprap (1.03): A constructed layer of stone to prevent erosion, scour, or sloughing; resistance depends on stone weight, size, shape, channel geometry, and filter blanket.
    • Gabion System (1.04): Wire-enclosed riprap; consists of wire mesh baskets filled with small riprap, anchored to slopes.
    • Geosynthetics (1.05): Include geotextiles (filtration, erosion control, sediment control – silt fences), geonets (continuous polymeric ribs for in-plane flow, with or without bonded geotextile filters, sometimes called composite drainage nets (CDNs)), and geocells (3D prefabricated polymeric systems, 100-200mm high, collapsed for delivery, then spread and filled).
    • Erosion Control Materials (1.06) are mentioned but specifics are missing.
    • Local Borrow Fill materials: ESCOMBRO costs ₱5,000 per 15-16 cubic meters. ESCOMBRO – BULIK (for Riprap) is also mentioned.

    Termite/Bukbok Proofing (2.01)

    • Physical barriers
    • Chemical barriers
    • Bait systems

    Roads & Parking (3.0)

    • Subgrade and Base Course Materials (3.01):
      • Borrow Material
      • Base Course: Hard, durable stone fragments with sand or other filler; meets AASHTO methods T-11 and T-26 grading requirements (sieve designations and percent weight passing specified).
      • Choker Aggregate
    • Paving and Surfacing (3.02):
      • Concrete
      • Bituminous Surfacing

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    Description

    Explore the essential concepts and materials related to earthworks, including definitions of acronyms and detailed descriptions of riprap, gabion systems, and geosynthetics. This quiz delves into erosion control measures, emphasizing the importance of various construction materials and their applications. Perfect for students keen on understanding civil engineering principles.

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