Bitumen Content and Sample Preparation in Asphalt Mix Design
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Questions and Answers

Which test involves determining the bitumen content by expressing it as a percentage of weight of bitumen with respect to the total weight of the mix or total aggregate in the mix?

  • Ash Point Test
  • Float Test
  • Water Content Test
  • Consistency measurement of bituminous material (correct)
  • In which test are aggregates required to be oven-dried at 150°C before testing commences?

  • Water Content Test
  • Ash Point Test
  • Consistency measurement of bituminous material (correct)
  • Flash and Fire Point Test
  • Which test involves compacting samples in a standard 100 mm diameter compaction mould using a 2.5 kg compaction hammer?

  • Water Content Test
  • Float Test
  • Ash Point Test
  • Consistency measurement of bituminous material (correct)
  • Which hazardous material test requires safety precautions to be exercised at all times due to the inhalation of solvent fumes being particularly harmful?

    <p>Consistency measurement of bituminous material</p> Signup and view all the answers

    In which test is it necessary to calibrate balances using reference weight once every twelve months?

    <p>Consistency measurement of bituminous material</p> Signup and view all the answers

    Which test is widely used for the design and control of asphaltic concrete and hot rolled asphalt materials?

    <p>Consistency measurement of bituminous material</p> Signup and view all the answers

    What is the purpose of the water content test for bitumen?

    <p>To assess the water content in bitumen samples</p> Signup and view all the answers

    Which of the following best describes the allowable maximum water content in bitumen?

    <p>0.1% by weight</p> Signup and view all the answers

    What is the significance of the loss on heating test for bitumen?

    <p>To evaluate the consistency of bituminous material</p> Signup and view all the answers

    In which temperature range is the loss on heating test typically conducted for bitumen?

    <p>180-200°C</p> Signup and view all the answers

    What does a loss in weight during the loss on heating test indicate about bitumen used in pavement mixes?

    <p>Higher volatility</p> Signup and view all the answers

    Which is a common parameter for grading bitumen in the 19th century?

    <p>Chewing method stiffness determination</p> Signup and view all the answers

    What is the purpose of the ash point test for bitumen?

    <p>To qualify the temperature at which bitumen vapors catch fire in the form of ash</p> Signup and view all the answers

    Why is it hazardous if volatile elements in bitumen catch fire at high temperatures?

    <p>It poses a safety risk due to fire hazard</p> Signup and view all the answers

    In the float test for bituminous material, what is the oat value based on?

    <p>The time taken for water to pass through the specimen plug</p> Signup and view all the answers

    Which test is used to determine the lowest temperature at which bituminous material ignites and burns?

    <p>Flash and fire point test</p> Signup and view all the answers

    Why is it desirable for bitumen to have minimum water content?

    <p>To prevent foaming when heated above water's boiling point</p> Signup and view all the answers

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