The total alumina content in high alumina cement should not be less than ___

Total sulphur content in the cement should not be more than _____

Which of the following is not a solid fuel?

The presence of chromium oxide in cement imparts _____ colour.

During the setting action of the cement, tricalcium aluminate is formed within ____ after adding water to the cement.

Clay predominates in calcareous materials while calcium carbonate predominates in argillaceous materials.

Which of the following is also known as residual asphalt?

Portland cement was invented by _______