Tips for Epoxy Injection: Proven Paths Towards Productivity and Quality
by John Trout

Although none of the following tips and methods are new, they've all been verified and found to be very rewarding. Perhaps one of the most important steps I'll discuss is the application of a seal, where a viscous epoxy is applied over the mouth of a crack so that resin can be injected under pressure into the crack through a series of parts. Other important tips I'll impart include injection and quality-control techniques that can help get the job done quickly and correctly. As with most things in life, some of these methods will require an initial investment of time and resources, but their use will produce benefits that far outweigh their initial costs. >> more

Cleaning Cracks Before Injection: Solution -- or Part of the Problem?
by John Trout

It is axiomatic in the concrete repair industry that if you are going to use an epoxy there has got to be a whole bunch of surface preparation or there will be a failure -- big time! Ergo, if you are going to inject a crack with an epoxy you had better think surface preparation.
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Methods of Payment for the Injection Contractor
by John Trout

On most construction applications it is fairly simple to prepare a specification which assures that the contractor is paid only for what he completes in a satisfactory manner and leaves little room for misunderstandings. >> more

Quality Control on the Injection Project
by John Trout

Deservedly, the resin injection process has more than a few skeptics. Specifiers have often been disappointed and embarrassed when assured results were not delivered. Specifications insisting upon years of experience, factory training, certifications, and licenses have not always helped. >> more

Resin Injection: A Permanent Fix
by John Trout

Epoxy injection has the reputation of being a structural repair procedure, and it is. However the vast majority of concrete crack injection applications (over 70% by the author's reckoning) are structural preservation rather than repair; that is, instances where resin is injected into faults in order to keep good concrete good rather than to restore design strengths. The sealing of cracks to protect exposed reinforcement is the most common example. >> more

Road Kill
by John Trout

For many years, reputable epoxy injection contractors struggled to gain the acceptance of performance (rather than procedural) specifications. Instead of being told how to do their job, they wanted the quality of their work to be judged by cores. >> more

Suggested Specification Language for the Injection of Cracks and Similar Voids in Concrete (Updated 4/01)
by John Trout

Including Scope of Work, Performance, Quality Assurance, Payment. >> more

Vacuum Assisted Pressure Injection vis-à-vis Unassisted Pressure

We much prefer to discuss our own technology rather than that of others, and that has been our policy and practice for over twenty years. But that has changed due to recent web-site claims by advocates of vacuum assisted pressure injection. They cite the benefits of vacuum assistance in the injection of ordinary cracks, and the dangers and limitations of high-pressure injection. >> more

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