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Concrete Composition and Environmental Impact Quiz

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Concrete Composition and Environmental Impact Quiz

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Questions and Answers

What are the main components of concrete?

Sand, water, and rocks

Gravel, water, and cement

Cement, water, and coarse aggregate (correct)

Cement, water, and fine aggregate

How has the large carbon footprint of concrete impacted the environment?

Decreased global warming effects

Reduced ecological damage

Increased CO2 emissions and temperature rise (correct)

Promoted sustainability

Which statement best describes the relationship between cement production and climate change?

Cement production has contributed positively to the environment

Cement production has exacerbated climate change through increased carbon footprint (correct)

Cement production has reduced global warming effects

Cement production has no impact on climate change

What is one of the purposes of using agricultural by-products in construction?

To replace some of the cement needed in concrete production Signup and view all the answers

Why are alternative cementitious materials considered in building projects?

To reduce the environmental impact of cement production Signup and view all the answers

What material can partially replace cement in making concrete works, according to the text?

Rice husk ash Signup and view all the answers

How did the addition of 10% RHA to aerated concrete affect the material?

Improved strength and durability Signup and view all the answers

Why is it important to carefully consider the RHA to cement ratio when using RHA in concrete mixes?

To maintain workability Signup and view all the answers

What threat can the impermeable microstructure of rice husk ash help concrete resist?

Sulfate attack Signup and view all the answers

What characteristic of coconut shells makes them significant for construction purposes?

Exceptional strength and modulus Signup and view all the answers