Concrete honeycombing essentially results in little hollow cavities left on the surface of the concrete, or right beneath it. They are a surface blemish which is usually a result of poor concrete consolidation, and are known as honeycombs due to their bees nest appearance. You could also compare the surface to cottage cheese, if you will.
Why Do Honeycombs Form?
Honeycombing occurs when the fine mortar fails to thoroughly fall and fill the gaps created by the coarse aggregate. As mentioned previously, poor concrete consolidation is usually the top cause of honeycombing, along with poor vibration, improper ratio of fine to coarse aggregate, dry concrete and construction conditions that are not up to standard.
Should You Worry About Concrete Honeycombing?
If you have noticed your property or concrete structure with honeycomb formations, you are probably wondering if this is an issue to be concerned about. Generally, it is merely a cosmetic deformation sitting on the exterior. The majority of surfaces affected by this condition are left untreated with no side effects or compromises to the actual foundation or its function.
Do keep in mind, however, that if the honeycombing has affected the concrete structure deeply, it can allow water to enter the home and freeze during winter time – this worsens the condition with the freeze and thaw cycles during wintertime. Water and moisture can also cause a whole host of problems like mold, and corrosion weakening the home’s foundation. In this case, proper steps should be taken to ensure the problem is corrected in order to sustain the integrity of the structure.
Repairing Concrete Honeycombing
If the condition is solely on the surface of the concrete and has not heavily or deeply affected the home’s structure, only a few steps are necessary to get it back to health. These steps include:
- Removing layers of honeycomb on the areas affected, until healthy concrete is exposed
- Thoroughly cleaning the exposed area of loose aggregate and accumulated debris
- Wetting the area in need of patching
- Applying grout matching in colour to retain aesthetic appeal
If you have any issues with concrete honeycombing on your property or driveway, contact Richmond Blacktop. We have more than 40 years of experience in our industry, with a team that is always ready to help you on your next project. Contact us for a free estimate!