Question

Silica fume is usually added during ____________

(a) Before concrete production at a concrete plant

(b) After concrete production at a concrete plant

(c) Concrete production at a concrete plant

(d) Curing

I got this question during an interview.

Question is from Silica Fume in section Admixtures and Construction Chemicals of Concrete Technology

Answer 1

Correct answer is (c) Concrete production at a concrete plant

Best explanation: Silica fume for use in concrete is available in wet or dry forms. It is usually added during concrete production at a concrete plant.