What Causes Concrete to Bubble When It Cures?

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Concrete is no longer just for driveways, floors and basketball courts. The versatile materials is less expensive than many other hard surfaces, and there are a variety of stains and paints used to create the perfect color and texture. Homeowners cure the concrete prior to sealing and painting. Bubbling occurs when there is an improper cure before applying a stain.

Curing Overview

  • Newly poured and hardened concrete needs anywhere from a week to three weeks of curing before applying any stain or sealant. The concrete is in a fragile state and is sensitive to temperature and moisture levels. Curing maintains a specific level of heat and moisture for an extended period of time until the concrete solidifies throughout.

Curing Benefits

  • Curing concrete makes the concrete stronger for the duration of its existence. It also makes it less prone to scratching, chipping and dusting due to such conditions as weather, hard contact and erosion. It is a necessary step to ensure the concrete stays pristine for as long as you need it.

Bubbling Cause

  • Curing allows air and moisture in the concrete to escape until fully hardened. If a homeowner applies a stain or sealant to the concrete before curing completion, then the air and moisture have a difficult time escaping. This causes bubbling in the stain as well as chipping and cracking. Bubbling can ruin the look of the concrete stain.

Fixing

  • It's not the actual concrete bubbling, it's the stain on top of the concrete. Fix the bubbling, chipping and cracking by removing the stain with a stain-stripping agent and waiting for the concrete to finish curing. Reapply the stain two to three weeks after the concrete was originally poured and the bubbling will not be a problem.

References

  • Photo Credit Jupiterimages/Photos.com/Getty Images
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