Question

For low alkali cement, alkali content is usually restricted to X% by weight, where X is:

• A. 0.04
• B. 0.4
• C. 0.50
• D. 0.60

Answer 1

The correct option is D 0.60

Ans.: (d) Alkalies range= 0.5 - 1.3%, It in excess, it cause efflorescence and staining.
Alkali content of 0.6% could be considered as a threshold point of high alkali cement. A low alkali cement should have total alkali content below 0.6%.