Question

Expanding cement is obtained by the addition of an expanding medium like _________ to the ordinary cement.

(a) Sodium silicate

(b) Potassium silicate

(c) Sodium aluminate

(d) Sulpho-aluminate

This question was addressed to me during an online exam.

I'd like to ask this question from Plain and Reinforced in portion Miscellaneous Materials, Plain and Reinforced Cement Concrete of Construction & Building Materials

Answer 1

Right option is (d) Sulpho-aluminate

To elaborate: Expanding cement is obtained by the addition of an expanding medium like sulpho-aluminate to the ordinary cement. Therefore, the expanding cement expands while all other cements shrink. It is used to repair the damaged concrete surfaces.