Question

‘Superplasticizers’ are chemicals which improve workability, which means the ability to shape the concrete before it has set.

(a) True

(b) False

This question was addressed to me in exam.

The doubt is from Analysis of Rates of Cement Concrete in chapter Analysis of Rates of Civil Engineering Drawing

Answer 1

Right choice is (a) True

The explanation: Pigments can change the dull grey colour. Corrosion inhibitors can reduce rusting on the steel bars. ‘Air entrainment’ is blowing little bubbles in the concrete before it sets. This helps the concrete survive the freezing and thawing of a cold climate. Blast furnace slag can be mixed with concrete. It turns the colour into almost pure white and makes the concrete stronger.