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M.Tech Structural Concrete Mix Design — practice questions

Explore 2 free Concrete Mix Design questions in M.Tech Structural Concretetechnology. Open each question or exercise to read its content, reference answers and available explanation.

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Concrete Mix Design questions and exercises with answers

Showing questions 1–2 of 2.

Tap TRUE or FALSE for each mix-design / mass-concrete statement.Read the answer and worked solution →Tap the steps of the IS Method of mix design in the correct order.Read the answer and worked solution →

Worked practice questions

Tap TRUE or FALSE for each mix-design / mass-concrete statement.

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Questions
  1. Statement is true
    Yes
    Statement
    The Himsworth constant for 5% defective characteristic strength is 1.65.
  2. Statement is true
    No
    Statement
    Liquid nitrogen used for cooling has a boiling temperature of −80 °C.
  3. Statement is true
    Yes
    Statement
    One ton of refrigeration in the mass-concrete formula equals 12 000 Btu/hr.
  4. Statement is true
    Yes
    Statement
    Latent heat of fusion of ice is taken as 80 cal/g in the heat-balance equation.
  5. Statement is true
    No
    Statement
    Embedded post-cooling pipes are 100 mm outer diameter with a 5 mm wall.
Interactive minigame on Concrete Mix Design. _Source: IGNOU Concrete Technology (ET-522) Mistral/in-session OCR._

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Tap the steps of the IS Method of mix design in the correct order.

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Steps
  1. Compute target mean strength = fck + K·σ
  2. Select water/cement ratio from durability and strength curves
  3. Read free-water content from Table 10.7 for the slump
  4. Read sand percentage of total aggregate from Table 10.8
  5. Apply corrections from Table 10.9 for actual conditions
  6. Cast trial mix and verify against target
Interactive minigame on Concrete Mix Design. _Source: IGNOU Concrete Technology (ET-522) Mistral/in-session OCR._

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More Concretetechnology topics

Testing of ConcreteConcreting EquipmentSpecial ConcreteCementAggregatesConcrete Technology HistoryStrength of Concrete