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Q: As per is 712, which of the following is class A type lime?
  • A. Magnesium lime
  • B. Fat lime
  • C. Semi hydraulic lime
  • D. Eminently hydraulic lime
Correct Answer: Option D - As per IS 712-1984– Cl– 3.1 Building lime– Class A- Eminently hydraulic lime used for structures purposes. Class B- Semi-hydraulic lime used for masonry mortars lime concrete and plaster undercoat. Class C- Fat lime used for finishing coat in plastering, white washing, composite mortar etc. Class D- Magnesium/dolomitic lime used for finishing coat in plastering, white washing. Class E- Kankar lime used for masonry mortars. Class F- Siliceous dolomitic lime used for undercoat and finishing coat of plaster.
D. As per IS 712-1984– Cl– 3.1 Building lime– Class A- Eminently hydraulic lime used for structures purposes. Class B- Semi-hydraulic lime used for masonry mortars lime concrete and plaster undercoat. Class C- Fat lime used for finishing coat in plastering, white washing, composite mortar etc. Class D- Magnesium/dolomitic lime used for finishing coat in plastering, white washing. Class E- Kankar lime used for masonry mortars. Class F- Siliceous dolomitic lime used for undercoat and finishing coat of plaster.

Explanations:

As per IS 712-1984– Cl– 3.1 Building lime– Class A- Eminently hydraulic lime used for structures purposes. Class B- Semi-hydraulic lime used for masonry mortars lime concrete and plaster undercoat. Class C- Fat lime used for finishing coat in plastering, white washing, composite mortar etc. Class D- Magnesium/dolomitic lime used for finishing coat in plastering, white washing. Class E- Kankar lime used for masonry mortars. Class F- Siliceous dolomitic lime used for undercoat and finishing coat of plaster.