Infrastructure Repairs Using Epoxy
Epoxy Concrete Injection Epoxy Wood Injection, epoxy crack repair
Epoxy Structural Concrete and Wood Repair / Waterproofing
The following article is written with enough information about resin injection systems to help protect the Owner from the misuse or improper installation of an injection systems. For more information contact me: Norm Lambert.
This is the second in a series on Infrastructure Repairs Using Epoxy. Part One was Introduction to Epoxy Injection. If your have not read that yet you may want to go back and read it before you proceed with reading this.
Part 2: Crack Analysis Before Epoxy Injection
As with all repair and rehabilitation of concrete, the initial job analysis is by far the most important step. Epoxy Injection Resin will weld concrete cracks but, of course, will not repair the cause of the cracking.
Analyze each potential injection application to determine the exact cause or causes of the cracking. Correcting the cracking problem can be fairly simple, or may be difficult involving design changes.
Consult a structural engineer when design changes are necessary. Do this before starting the injection. Repairing cracks by Injection is effective after these design changes. Prevent future cracks by fixing the original cause of the cracking, when ever possible.
Parking garages are an example of cracking problem that require a structural engineering analysis. Often inadequate design for expansion/contraction is the cause for parking garage structural cracking. Avoid weld injecting a crack if there are not enough expansion joints. Sometimes flexible overlays such as Epoxy.com System # 495 can be used to overcome this defect. This does not however encapsulate the rebar in a way that will totally stop the premature deterioration of the steel. Often times additional joints are needed, thus the analysis of cracking problems is critical.
Bridge decks and slab on grades can often be repaired with Epoxy.com Product #684LV crack healer and sealer and save some of the cost of doing epoxy injection.