Question 1

Why add 10% wastage for concrete?

Accepted Answer

A wastage buffer covers uneven ground, spillage, compaction variation, measurement error, and small site losses.

Question 2

What does 1:2:4 concrete mix mean?

Accepted Answer

It means 1 part cement, 2 parts sand, and 4 parts aggregate by volume.

Question 3

How many cement bags are in one cubic meter?

Accepted Answer

For estimation, one 50 kg cement bag is about 0.0347 cubic meters, so bag count depends on mix ratio and dry volume.

Question 4

Is this suitable for structural concrete?

Accepted Answer

Use it for estimation only. Structural concrete design and grade selection should follow engineer-approved specifications.