Properties of Concrete Video Lecture | RCC & Prestressed Concrete - Civil Engineering (CE)

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1. What are the key properties of concrete in civil engineering?
Ans. Concrete in civil engineering possesses several important properties, including high compressive strength, good durability, excellent fire resistance, low maintenance requirements, and versatility in design and construction.
2. How is compressive strength determined in concrete?
Ans. Compressive strength in concrete is determined by conducting compression tests on cylindrical or cube-shaped specimens. These specimens are made by pouring and compacting concrete into molds, curing them for a specified period, and then subjecting them to a compressive load until failure occurs.
3. What factors affect the durability of concrete structures?
Ans. Several factors can impact the durability of concrete structures, such as exposure to aggressive chemical environments, freeze-thaw cycles, carbonation, and the presence of reinforcing steel. Proper mix design, adequate curing, and the use of appropriate construction practices can help enhance the durability of concrete.
4. How does concrete provide fire resistance in buildings?
Ans. Concrete offers excellent fire resistance due to its inherent properties. It has low thermal conductivity, which means it does not conduct heat quickly. Additionally, concrete does not burn or release toxic gases when exposed to fire, providing a significant advantage in ensuring the structural integrity and safety of buildings during fire incidents.
5. Is concrete a sustainable material in civil engineering?
Ans. Yes, concrete can be considered a sustainable material in civil engineering. It is produced from readily available raw materials, such as cement, aggregates, and water. Concrete structures have a long lifespan, require minimal maintenance, and can be recycled or repurposed at the end of their service life. Additionally, the use of supplementary cementitious materials, such as fly ash or slag, can further reduce the environmental impact of concrete production.
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