Construction materials - C2b - Flashcards in GCSE Science

Created by: iram_f
Created on: 22-11-14 23:48

Why is reinforced concrete better than normal concrete?

Reinforced concrete is better than normal concrete as it supports the concrete from within, making it flexible and less likely to crack under tension. Normal concrete can only withstand compression.

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How does the formation of rocks affect their hardness?

Sed. rocks (limestone) are not hard as they are created by the compaction of dead animals/plants. Met. rocks chemically change under high temps. & pressure to become harder, like marble. Ig. rocks (granite) have interlocking crystals = more hard.

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What is thermal decomposition and give an example?

Thermal decomposition is the chemical breakdown of a compound into its orignial reactants, under the effect of heat. For example, the symbol equation for the thermal decomposition of calcium carbonate is CaCO3 = CaO + CO2.

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What are the pros and cons of quarrying limestone?

Some of the problems are the damaged landscape, dust pollution, traffic and noise from the lorries. But the land could be covered with grass or filled with water for a recreational lake once the quarrying was done.

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How do you make concrete?

Limestone + clay = cement. Cement + sand + water = mortar. Cement + sand + water + gravel = concrete.

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Other cards in this set

Card 2

Front

How does the formation of rocks affect their hardness?

Back

Card 3

Front

What is thermal decomposition and give an example?

Back

Card 4

Front

What are the pros and cons of quarrying limestone?

Back

Card 5

Front

How do you make concrete?

Back

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Construction materials - C2b