When you do a thorough inspection of your foundation, you can notice foundation spalling appear as flaking, chipping, or crumbling areas on your foundation. You can even see it as hairline cracks. Another indicator is efflorescence, also called salt deposits.
Generally, when spalling has occurred, we can repair that section by removing the damaged rebar and installing new rebar within a new concrete pour. But if the damage is too severe and compromises the home's structural integrity, we recommend removal and replacement of the affected areas.
Spalling is a particularly dangerous kind of foundation problem because most homeowners don't recognize that it's not the cosmetic issue it appears to be. The physical damage that occurs during spalling is relatively insignificant, but it's a sign of much more severe problems that need to be addressed immediately.
Repair Spalled Concrete Driveway
Concrete resurfacing resolves spalling issues and costs an average of $2.50 to $4 per square foot, with a range of $1,400 to $2,300 for a 24' x 24' driveway. Spalling occurs when some sections start to crumble. It could also cause the driveway to separate into thin layers.
Concrete Repairs & Remediation
If ignored, the crack could allow water to ingress the concrete and cause accelerated concrete spalling. A metre of concrete spalling will likely cost you between $900 and $5500 depending on the location to repair correctly.
As the owner, you are responsible for the prevention and repair of any spalling concrete in your flat. Spalling concrete within HDB flats can be prevented with regular maintenance. If there is spalling concrete, you can repair it yourself if the area is small.
Cleaning and sealing concrete soon after installation can help prevent spalling.
Concrete Spalling is the breakdown of concrete via natural weathering and/or chemical reaction that results in sections of cement chipping off the main body – often resulting in fractured, compromised concrete. Spalling looks like pitted acne scarring and breaks off in flecks which can expose rebar.
One of the leading causes of concrete spalling is the freeze-thaw cycle. When water seeps into the concrete, it can freeze and expand, leading to cracks and the surface layer peeling away. This damage gets worse with each freeze-thaw event.
Spot Signs of Foundation Problems Before It's Too Late. Spotting signs of foundation issues before it's too late is crucial. Look for cracks in walls or floors, uneven/sloping floors, sticking doors/windows, and gaps around them. Also, be mindful of cracks in exterior brick or concrete, and a sagging/uneven roofline.
There are a number of reasons why spalling occurs including freeze thaw cycling, the expansive effects of Alkali Silica Reaction or exposure to fire. However, the most common cause of spalling is the corrosion of embedded steel reinforcement bars or steel sections.
You may need to scarify the surface, depending on how many loose areas are present. Next, stabilize the area with S-1300 Pene-Krete®. This product will get into the pores of the concrete and provide a crystallization that does not allow for the movement of water through the concrete.
Depending on the size of the damage, the products needed for repair will vary. If the concrete spalling is less than 1/ of the concrete thickness, a surface repair will suffice. Epoxy or portland-cement-based work best. If damages are greater than 1/3 of the concrete thickness, full depth restoration may be required.
Flaking or chipping foundations are more than cosmetic flaws, they could indicate foundation failure due to aging, settlement, or water issues. If aging is the case, our experts can restore and stabilize your foundation.
The main difference between concrete scaling and spalling is that scaling affects only the surface layer, causing it to flake or peel, while spalling originates from deeper within the concrete, leading to the disintegration of larger surface fragments.
In order to detect spalling concrete slabs early, keep an eye out for flaking, chipping, or missing large chunks of concrete from the surface, as well as exposed coarse rocky concrete aggregate. Spalling, however, can be difficult to detect by physical signs alone.
In reinforced structures, spalling can cause problems in structural integrity if left untreated. Not to mention spoiling the aesthetics of your property. However, with the right preventive measures and expert spalling concrete repair services, you won't have to worry about the structural integrity of your buildings.
Fixing Spalling Concrete
If the spalls penetrate less than one-third of the depth of the concrete, a patch or repair can correct the issues. If deeper spalls or pits are present, however, it may be best to completely remove the concrete and pour a new foundation.
LIN-SEAL is specifically formulated to reduce spalling and scaling of concrete. This type of penetrating compound is recommended by many state Departments of Transportation for prolonging the life cycle of concrete exposed to water, de-icing salts, and other destructive materials.
Identifying Concrete Spalling
Surface Flakes and Chips: Look for visible signs of flaking or chipping on the surface of the concrete. Spalled areas often have a rough, uneven texture.
Mild spalling may be purely aesthetic, but serious spalling can threaten the structural integrity of the whole building, requiring costly repair work. If there is significant damage to the brickwork, you should get a specialist in to assess the risk as soon as possible.
Concrete is prone to spalling when the temperature between 200 °C and 500 °C. There are many factors that affect the spalling of concrete. Internal factors include the water–cement ratio, moisture content, aggregate types, permeability, etc.
We remove spalled and delaminated concrete using a saw, chipper, or mill. Jackhammers should be small—no more than 30 pounds to prevent concrete damage beyond the repair area. An ideal patch would be rectangular or square with vertical edges at the edges to contain it.