5 Important Properties Of Concrete You Should Know As A Construction Professiona

1. Strength of Concrete:

Compressive strength stands as the most critical property of concrete. It signifies the maximum axial compressive stress a cylindrical concrete sample can endure before failing. While concrete is weak in tension, it exhibits remarkable strength in compression, making it an ideal material for foundations, walls, and beams.

Other essential strengths include:

• Tensile strength: Approximately 10% of the compressive strength.
• Bending strength: Roughly 15% of the compressive strength.
• Shear strength: Approximately 20% of the uniaxial compressive strength.

Various tests are conducted to determine concrete strength, such as compression tests, flexure tests, and split tensile strength tests. Among these, the compression test is the most common, wherein specimens are crushed to calculate the compressive strength.

2. Workability:

Concrete's workability refers to its ability to be shaped easily and achieve a smooth finish. The water-cement ratio plays a significant role in determining workability.

Theoretically, a water-cement ratio of 0.4 is sufficient for cement hydration and maximum strength. However, achieving proper compaction is crucial for optimal concrete strength, which may necessitate adjusting the water content.

3. Durability:

Concrete's durability enables it to withstand weathering, chemical attack, abrasion, and other forms of deterioration.

A proper mix design, along with adequate curing and protection against aggressive environments, contributes to concrete's long-term durability.

4. Creep:

Creep is a property of hardened concrete where it gradually deforms over time under sustained load.

Engineers consider creep when designing structures to ensure long-term stability.

5. Shrinkage:

Concrete experiences shrinkage due to drying and chemical reactions during hydration.

Proper curing and mix design play essential roles in minimizing shrinkage cracks in concrete structures.

Remember, mastering these properties empowers you to create defect-free concrete structures that stand the test of time!