C2b-construction Materials Flashcards
What are bricks made out of?
Hardened clay
What is glass made out of?
Melting limestone sand and soda
What are the environmental problems with extracting rocks?
Landscape destroyed and has to be reconstructed when mining/quarrying has finished
Increased noise traffic and dust
What kind of rocks are limestone, marble and granite?
Limestone - sedimentary
Marble - metamorphic
Granite - igneous
How is marble made?
High pressure and temperature on limestone
How is sedimentary rock formed?
Layers of sediment buried
Layers press down and squeeze water out
Fluids flowing through pores deposit natural mineral cement
What is the word equation for the decomposition of limestone?
Calcium carbonate –> calcium oxide + carbon dioxide
What is the balanced symbol equation for decomposition of limestone?
CaCO3 –> CaO + CO2
What are aluminium and iron made out of?
They’re extracted from ores in rocks
How is concrete made?
Cement, sand, aggregate and water mixed together
Mixture then allowed to set
How is cement made?
Limestone and clay are heated together
Why is reinforced concrete a better construction material than non reinforced concrete?
Hardness of the concrete
Flexibility and strength of the steel
