Question

transition zone in concrete is * 1 point time where concrete gets converted from the wet form to the dry form cement particles taking part in hydration process the process in which concrete shrinks when allowed to dry in air at low relative humidity zone between aggregate and hydrated cement paste

Answer 1

A larger porosity and lower cement content than other areas, the area known as the "interfacial-transition zone" (ITZ) where aggregates and cement paste meet is crucial

By "transition zone in concrete," what do you mean?

• Because it has a larger porosity and lower cement content than other areas, the area known as the "interfacial-transition zone" (ITZ) where aggregates and cement paste meet is crucial (Figure 1). The ITZ is where microcracks frequently start and spread most quickly.
• ITZ is the "weak-link" of concrete, as indicated in section 3.1, because of its high porosity. Damages done to concrete therefore have a major impact on the ITZ (either chemically, mechanically, or thermally). A higher level of damage consequently results in less contact between the aggregate and the mortar.      

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