search
arrow-left Previous
Next arrow-right
Q: The Efflorescence test is applicable to
  • A. Fine sand
  • B. Coarse aggregate
  • C. Cement
  • D. Brick
Correct Answer: Option D - Efflorescence-The efflorescence is said to be moderate in bricks if salt deposits cover 50% surface area approximately. Presence of Efflorescence is classified as IS 3495 Part-III as below- Nil-When the deposit of efflorescence is imperceptible. Slight-When the deposit of efflorescence does not cover more than 10% of the exposed area of the brick. Moderate- When the deposit of efflorescence is more than 10% but less than 50% of exposed area of the brick. Heavy-When the deposit of efflorescence is more then 50% but the deposits do not powder or flake away the brick surface.
D. Efflorescence-The efflorescence is said to be moderate in bricks if salt deposits cover 50% surface area approximately. Presence of Efflorescence is classified as IS 3495 Part-III as below- Nil-When the deposit of efflorescence is imperceptible. Slight-When the deposit of efflorescence does not cover more than 10% of the exposed area of the brick. Moderate- When the deposit of efflorescence is more than 10% but less than 50% of exposed area of the brick. Heavy-When the deposit of efflorescence is more then 50% but the deposits do not powder or flake away the brick surface.

Explanations:

Efflorescence-The efflorescence is said to be moderate in bricks if salt deposits cover 50% surface area approximately. Presence of Efflorescence is classified as IS 3495 Part-III as below- Nil-When the deposit of efflorescence is imperceptible. Slight-When the deposit of efflorescence does not cover more than 10% of the exposed area of the brick. Moderate- When the deposit of efflorescence is more than 10% but less than 50% of exposed area of the brick. Heavy-When the deposit of efflorescence is more then 50% but the deposits do not powder or flake away the brick surface.