Red Seal Concrete Finisher Practice Exam 2025 – Your All-in-One Guide to Exam Success!

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What condition can result from excessive moisture during the curing process?

Thicker concrete layers

Formation of efflorescence

The correct answer is the formation of efflorescence. Efflorescence is a white, powdery substance that can appear on the surface of concrete when soluble salts migrate to the surface and crystallize as water evaporates. This condition is often exacerbated by excessive moisture during the curing process, as the increased water content can dissolve more salts within the concrete mix or from surrounding soils, leading to a greater likelihood of these salts appearing on the surface.

Maintaining an appropriate moisture level during curing is essential. Too much moisture can disrupt the balance needed for chemical reactions, affecting the overall durability and aesthetic of the concrete. While thicker concrete layers, stronger bonds with aggregate, or improved finish quality might seem beneficial, these outcomes are not typically associated with excessive moisture; in fact, they could indicate issues arising from poor curing practices.

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Stronger bond with aggregate

Improved finish quality

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