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A Concrete Example Video Lecture | English Poorvi Class 8 - New NCERT
FAQs on A Concrete Example Video Lecture - English Poorvi Class 8 - New NCERT
| 1. What is the significance of concrete in construction? |  |
Ans.Concrete is a vital material in construction due to its strength, durability, and versatility. It can be molded into various shapes and is used in a wide range of structures, from buildings and bridges to roads and dams. Its ability to withstand compression makes it an ideal choice for load-bearing applications.
| 2. What are the main components of concrete? | |
Ans.The primary components of concrete are cement, water, aggregates (sand and gravel or crushed stone), and admixtures. Cement acts as a binder, while water initiates the chemical reaction that hardens the concrete. Aggregates provide bulk and strength, and admixtures can enhance certain properties, such as workability or curing time.
| 3. How does the curing process affect concrete? | |
Ans.Curing is the process of maintaining adequate moisture, temperature, and time to allow the concrete to achieve its desired strength and durability. Proper curing prevents cracking and ensures that the concrete develops its full potential. It typically involves keeping the surface moist for several days after pouring.
| 4. What are the common types of concrete used in construction? | |
Ans.Common types of concrete include normal strength concrete, high-strength concrete, lightweight concrete, and reinforced concrete. Each type has specific applications; for instance, reinforced concrete is used where tensile strength is necessary, while lightweight concrete is often used in structures where reducing the overall weight is crucial.
| 5. What are the environmental impacts of concrete production? | |
Ans.Concrete production has several environmental impacts, including high carbon dioxide emissions from cement manufacturing, resource extraction, and energy consumption. Additionally, the extraction of aggregates can lead to habitat destruction and water pollution. Efforts are being made to develop more sustainable practices, such as using recycled materials in concrete.
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Sep 24, 2025
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