Question

It is found that moisture content of about __________ is appropriate for the timber formwork.

(a) 20%

(b) 30%

(c) 40%

(d) 50%

I had been asked this question in my homework.

I want to ask this question from Materials Used for Formwork topic in chapter Arches, Lintels, Stairs and Formwork of Construction & Building Materials

Answer 1

The correct option is (a) 20%

To explain I would say: If the timber is too wet, it will shrink in hot weather resulting in gaps in the form work through which concrete will flow out. Hence, the ridges will be formed on the concrete surface.