Erstellt von Emily Y :)
vor mehr als 8 Jahre
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Frage | Antworten |
Cement | Limestone is heated with clay |
Concrete | Cement mixed with sand, (water) and aggregate can be reinforced with steel |
Mortar | Cement and sand weaker than concrete |
Ores | Mined, May be concentrated/purified has to be economical to extract typically metal oxides |
Metal extraction | If less reactive with carbon: extracted by reduction using carbon More reactive than carbon? Electrolysis |
Copper extraction | Can be extracted by heating (smelting) purified by electrolysis |
Aluminium and Titanium extraction | Electrolysis extraction >lots of evergy used >many stages in the process Titanium extracted by displacement |
Cast Iron | 96% iron High strength in compression Brittle Manhole covers, etc. |
Steels | Low carbon = easily shaped High carbon = hard Stainless steels (with chromium and nickel) = corrosion resistance |
Transition metals Advantages | Malleable, ductile to heat and electricity |
Copper Uses + advantages | Electical wiring and pipes Good conductor Malleable yet hard Unreactive with water |
Aluminium/titanium Uses/advantages | Low density Corrosion resistant hip replacements etc. |
Alloys (General) | Make harder (different sized atoms disrupt regular structure) Differing properties All metals bond e.g brass, steels, etc. |
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