Amazon Interview Questions and Answers

The strength of 7 days cube specimen for M50 concrete should be at least...

• The strength of concrete is measured in terms of compressive strength

• For M50 concrete, the strength of 7 days cube specimen should be at least 50 MPa

• This means that the cube specimen should be able to withstand a compressive force of 50 megapascals after 7 days of curing

IS 456 is a code of practice for the design and construction of reinforced concrete structures.

• IS 456 provides guidelines for the use of plain and reinforced concrete in construction.

• It specifies the minimum grade of concrete, reinforcement details, and design requirements.

• The code also covers the durability, workability, and strength of concrete.

• For example, it recommends a minimum grade of M20 for reinforced concrete and M15 for plain concrete.

• It also specifies the minimum ...read more

GGBS is included in concrete mix to improve its strength, durability, and sustainability.

• GGBS (Ground Granulated Blast Furnace Slag) is a by-product of the iron and steel industry.

• It is used as a partial replacement for Portland cement in concrete mix.

• GGBS enhances the workability of concrete and reduces the heat of hydration.

• It improves the long-term strength and durability of concrete.

• GGBS also reduces the risk of alkali-silica reaction and sulfate attack.

• By using GGBS, the...read more

IS 456 is a code of practice for the design and construction of reinforced concrete structures.

• IS 456 is a standard code of practice for the use of reinforced concrete in construction.

• It provides guidelines for the design, construction, and maintenance of reinforced concrete structures.

• The code covers various aspects of reinforced concrete, including materials, design, construction, and testing.

• It also includes provisions for durability, fire resistance, and earthquake resist...read more