Transition phase of concrete- Effect of the transition phase of Concrete

Concrete is considered to be two-phase material

1.Paste phase

2.Aggregate phase

At the microscope level, the complexities of the concrete begin to slow up, particularly in the vicinity of large aggregate particles.

This area is considered as a third phase called the transit zone, which represents the interfacial region zone between the particles of coarse aggregate and hardened paste.

The transition zone is a plane of weakness and therefore has a great influence on the mechanical behavior of concrete.

Effect of Transition zone in properties of concrete is explained below:

1. The transition phase is considered a strength-limiting phase.
2. Microcracks are developed due to shrinking and variation in temperature.
3. Forgiven W/C ratio or cement contain hydration strength decreases with an increase in coarse aggregate size. A similar increase in W/C ratio makes concrete prone to permeability.
4. Concrete shows brittle behavior in tension and tough behavior in compression.

I hope this article on “Transition Phase of Concrete” remains helpful for you.

Happy Learning – Civil Concept

Contributed by,

Civil Engineer – Ranjeet Sahani

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