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  • Question
  • Addition of pozzolana to cement causes


  • Options
  • A. reduction in permeability
  • B. loss of heat of hydration
  • C. reduction in bleeding
  • D. increase in curing time
  • E. all the above.

  • Correct Answer
  • all the above. 


  • Concrete Technology problems


    Search Results


    • 1. The maximum thickness of concrete floor of a cement warehouse, is

    • Options
    • A. 10 cm
    • B. 15 cm
    • C. 20 cm
    • D. 25 cm
    • E. 30 cm
    • Discuss
    • 2. Batching error means inaccuracy in the quantity of

    • Options
    • A. aggregates
    • B. cement
    • C. water
    • D. all the above.
    • Discuss
    • 3. Hardening of cement occurs at

    • Options
    • A. rapid rate during the first few days and afterwards it continues to increase at a decreased rate
    • B. slow rate during the first few days and afterwards it continues to increase at a rapid rate
    • C. uniform rate throughout its age
    • D. none of these.
    • Discuss
    • 4. A construction joint is provided where

    • Options
    • A. bending moment is small
    • B. shear force is small
    • C. the member is supported by other member
    • D. all the above.
    • Discuss
    • 5. Pick up the correct statement from the following:

    • Options
    • A. Construction joints are necessarily planned for their locations
    • B. Expansion joints are provided to accommodate thermal expansion
    • C. Construction joints are provided to control shrinkage cracks
    • D. Expansion joints need not be provided in foundation concrete
    • E. All the above.
    • Discuss
    • 6. Pick up the correct statement from the following:

    • Options
    • A. Water cement paste hardens due to hydration
    • B. During hardening cement binds the aggregates together
    • C. Cement provides strength, durability and water tightness to the concrete
    • D. All the above.
    • Discuss
    • 7. Too wet concrete may cause

    • Options
    • A. weakness of concrete
    • B. excessive laitance
    • C. segregation
    • D. lower density
    • E. all the above.
    • Discuss
    • 8. Pick up the correct statement from the following:

    • Options
    • A. Lime in excess, causes the cement to expand and disintegrate
    • B. Silica in excess, causes the cement to set slowly
    • C. Alumina in excess, reduces the strength of the cement
    • D. Magnesium oxide in excess, remains in free state and makes the cement unsound
    • E. All the above.
    • Discuss
    • 9. Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is

    • Options
    • A. 30%
    • B. 40%
    • C. 50%
    • D. 60%
    • E. 70%
    • Discuss
    • 10. Separation of coarse aggregates from mortar during transportation, is known

    • Options
    • A. bleeding
    • B. creeping
    • C. segregation
    • D. shrinkage
    • E. none of these.
    • Discuss


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