Question

Chemically active pore fillers __________ the setting of concrete.

(a) Retards

(b) Decrease

(c) Accelerates

(d) No change

This question was addressed to me in an internship interview.

This intriguing question originated from Water Proofing Admixtures topic in section Admixtures and Construction Chemicals of Concrete Technology

Answer 1

The correct answer is:

(a) Retards

Chemically active pore fillers generally retard the setting of concrete. These fillers help in improving the durability of concrete by filling the pores, but they may slow down the setting time, which is why they are often used in combination with other admixtures or under specific conditions.