(1)Why do we paint building and steel.(2)what are coarse and aggregate.(3)what are formwork and scaffolding.?

Question

Iam a student from federal polytecnic damaturu in Nigeria from department of civil engineering.thanks

Answer 1

1. ) We really need to paint building and steel to prevent from rust, by then it will help the structure to last long..We all know that rust is one of the problem that loosen the strenght of steel..

2.) Construction aggregate, or simply "aggregate", is a broad category of coarse particulate material used in construction, including sand, gravel, crushed stone, slag, and recycled concrete. Aggregates are a component of composite materials such as concrete and asphalt concrete; the aggregate serves as reinforcement to add strength to the overall composite material.

3.)

Formwork is the term given to either temporary or permanent moulds into which concrete or similar materials are poured.

http://en.wikipedia.org/wiki/Formwork#Fo...

Scaffolding is a temporary framework used to support people and material in the construction or repair of buildings and other large structures. It is usually a modular system of metal pipes (termed tubes in Britain), although it can be made out of other materials.

http://en.wikipedia.org/wiki/Scaffolding

good luck!!!!!!!!

god bless you