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KNS 1042 Civil Engineering Materials: Pavement Materials - Binder Types
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KNS 1042 Civil Engineering Materials: Pavement Materials - Binder Types

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Questions and Answers

What are the primary reasons for the extensive use of bituminous materials in roadway construction?

  • Excellent binding characteristics and waterproofing properties (correct)
  • Low cost and high resistance to environmental degradation
  • Resistance to temperature changes and high melting point
  • High strength and durability

    • What is the main constituent of bituminous materials?

  • High molecular weight hydrocarbons (correct)
  • Petroleum oils
  • Tar
  • Adhesive properties

    • What is a distinguishing characteristic of bitumen compared to tar?

  • Solubility in carbon disulphide (correct)
  • Waterproofing properties
  • Distinct melting point
  • Adhesive properties

    • What type of bitumen is recommended for surface dressing and patchwork in road construction?

    <p>Rapid Curing (RC)</p> Signup and view all the answers

    What is the approximate bitumen content in bitumen emulsion?

    <p>68%</p> Signup and view all the answers

    What are tars derived from?

    <p>Organic substances such as coal, wood, or petroleum</p> Signup and view all the answers

    Which type of tar has a high aromatic content and 50% pitch content?

    <p>Tars produced at temperatures above 1200°C during manufacturing of coke</p> Signup and view all the answers

    Where are the biggest deposits of natural asphalt / rock asphalt / lake asphalt found?

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

    What is the nature of low aromatic tar?

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

    What is the maximum Pen value for asphalt found in Trinidad?

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

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