The most common reason for a concrete repair failure is poor design, installation, or construction. Concrete repairs fail because they are not adequately designed to address the problem they intended to fix or install improperly or untrained people. Sometimes, even when installed correctly, the same repair fails again because it wasn’t designed with future damage in mind. The common causes of concrete repair failures generally fall into three categories: insufficient load-bearing capacity, lack of sufficient bond strength, and chemical grouting.

What does chemical grouting mean?

Chemical grouting involves applying a special kind of epoxy resin to cracks inside the concrete instead of traditional crack repair. This kind of repair is highly effective in filling small cracks but can also be used to fill voids and improve the strength of concrete structures. An epoxy resin is inserted into fractures within the concrete, penetrating the interior surface. Next, an adhesive chemical agent is mixed with resin, which chemically strengthens the surrounding material.

How does this process work?

This process involves filling cracks or voids by injecting a unique mixture called an epoxy resin into it. There are two steps involved: firstly, the crack should be prepared for injection; secondly, after preparing the crack, it must be filled with this resinous compound before hardening. The hardened resin will help prevent further degradation of the structure due to moisture penetration. The area where the chemical is injected starts to swell very quickly, which means it expands into all of the tiniest crevices in your concrete. It then hardens into a seal that will prevent water from seeping underground – which causes many issues with your slab surface.

Why Chemical Grouting Fails

A common reason chemical grouting fails is that it wasn’t done correctly or with high-quality materials. When it comes to chemical grouting, you must make sure that it is injected into the ground at an even depth around the edges of your crack or hole. This means that there can’t be any exposed dirt left on top after finishing. It also means that if one side isn’t deep enough, it won’t receive a continuous seal and can develop another issue in your patched area.

Another cause for chemical grouting failure could be a lack of sand cement stabilization, which makes up a large portion of proper concrete mixing. The sand cement mixture prevents water from seeping down while still allowing water to pass through. If the area doesn’t have proper sand cement stabilization, it will be challenging to properly inject chemical grouting because water may seep in before the mixture cures. Plus, if the mixtures aren’t mixed correctly, there is a high chance that they won’t cure at all.

Ultimately, chemical grouting must be done correctly for it not to fail. Be sure you hire someone with the proper knowledge and experience by reading reviews online or asking friends and family members for recommendations.

Meet Lance Davis


Lance Davis is a third generation Concrete Contractor with over 10+ years experience in concrete repair and slabjacking. His company Davis & Sons Concrete has proudly served all of North Central Illinois, Rockford and the outer suburbs - and he would love to hear from you!

Click for your FREE Estimate!
Or Call (815) 663 - 5555