Red Seal Concrete Finisher Practice Exam 2026 – Your All-in-One Guide to Exam Success!

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What is one method to control shrinkage cracking in concrete?

Using a higher water/cement ratio

Incorporating control joints

Incorporating control joints is an effective method to control shrinkage cracking in concrete. Control joints are strategically placed grooves in the concrete slab that allow for movement and help to manage the natural shrinkage that occurs as the concrete cures and dries. When the concrete shrinks, it will tend to crack, but if control joints are properly placed, they can guide the cracking to occur along the joints rather than randomly throughout the slab.

This proactive approach helps in minimizing aesthetic and structural issues that arise from uncontrolled cracking, ensuring that any fractures will be less noticeable and less likely to compromise the integrity of the concrete. Control joints also allow for planned expansion and contraction, making the concrete more resilient over time.

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Decreasing the amount of cement

Using larger aggregates

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