Question

The modulus of elasticity of concrete is influenced by:

• A. Age of concrete
• B. Type of aggregate
• C. Water-cement ratio
• D. All of the above

Hint:

For concrete, a lower water-cement ratio and the right choice of aggregate result in a higher modulus of elasticity.

Answer 1

The Correct Option is D

The modulus of elasticity of concrete depends on several factors, including: 1. Age of concrete: As concrete ages, its modulus of elasticity increases due to the continued hydration of cement particles.
2. Type of aggregate: The nature and properties of the aggregate (e.g., density, type) influence the overall stiffness of the concrete.
3. Water-cement ratio: A lower water-cement ratio leads to higher concrete strength and stiffness, thus increasing the modulus of elasticity.
Since all of these factors affect the modulus of elasticity, the correct answer is:
\[ \boxed{(D) \, \text{All of the above}} \]