C2B - Building Materials Flashcards
How is glass made ?
Heating limestone, sand and soda together until they melt
How do we get aluminium and iron ?
Extracting ores in rocks
What are bricks made from ?
Clay
Why is clay good for making bricks ?
It’s soft when it is dug up making it easy to mould
If clay is soft how is it able to make a brick which needs to be hard ?
It needs to be fired at very high temperatures
What do you need to do to make cement ?
Heat limestone and clay
Explain the process of making cement ?
Powdered clay and powdered limestone are roasted in a rotating kiln to make a complex mixture if calcium and aluminium silicates.
Cement is mixed with water which gradually makes it set hard
Dan wants to make concrete. How would he ?
Mix cement with sand, aggregate and water
What is an advantage and disadvantage of concrete ?
A ; quick and cheap
D ; not aesthetically pleasing
Reinforced concrete is a what ?
Composite material
How would you go about reinforcing concrete ?
Put in solid steel rods
What is an advantage of reinforced concrete ?
Hardness of concrete with the flexibility and strength of steel
Quarrying is very common. But what are the problems with it.
1) uses up land destroying habitats
2) transporting from site causes noise and pollution
3) produces dust and again noise bc dynamite !
4) disused sites are dangerous
