importance Flashcards
1
Q
cement
A
limestone heated with clay
2
Q
cement use
A
make mortar and concrete
3
Q
glass
A
limestone sand and sodium carbonate heated
4
Q
concrete
A
cement sand gravel mixed with water
5
Q
glass use
A
windows
6
Q
concrete use
A
reinforced with steel rods make material stronger
7
Q
mortar
A
cement and sand added to water
8
Q
mortar use
A
brick laying
9
Q
quicklime
A
limestone thermally decomposed to give quicklime + carbon dioxide
(calcium oxide CAO)
10
Q
slaked like
A
quicklime CaO + water H2O –> slaked like (calcium hydroxide Ca(OH)2
11
Q
copper use, why?
A
water pipes
high melt
does not react with water
12
Q
lead use
why?
A
flashing on roofs
unreactive, malleable
13
Q
copper - wiring
A
high melt
good conductor
14
Q
aluminium use
why?
A
window frames
resistant to corrosion
malleable
15
Q
ceramics properties
3
A
hard brittle solids
high melt
resistant to chemical attack
