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Q: White cement manufacturing needs higher firing temperature up to:
  • A. 1650⁰C
  • B. 1850⁰C
  • C. 1950⁰C
  • D. 1750⁰C
Correct Answer: Option A - White and colourd Portland cement (IS : 8042)– • From pure white chalk and china clay. • Nil iron oxide • These are used for making terrazzo flooring, ornamental work and casting strokes. • Hunter scale is use for checking the whiteners of cement. • Whiteness should not be less than 70% when use Ist scale. • 5-10% colouring pigment before grinding white cement manufacturing needs higher firing temperature upto 1650⁰C.
A. White and colourd Portland cement (IS : 8042)– • From pure white chalk and china clay. • Nil iron oxide • These are used for making terrazzo flooring, ornamental work and casting strokes. • Hunter scale is use for checking the whiteners of cement. • Whiteness should not be less than 70% when use Ist scale. • 5-10% colouring pigment before grinding white cement manufacturing needs higher firing temperature upto 1650⁰C.

Explanations:

White and colourd Portland cement (IS : 8042)– • From pure white chalk and china clay. • Nil iron oxide • These are used for making terrazzo flooring, ornamental work and casting strokes. • Hunter scale is use for checking the whiteners of cement. • Whiteness should not be less than 70% when use Ist scale. • 5-10% colouring pigment before grinding white cement manufacturing needs higher firing temperature upto 1650⁰C.