Water Treatment Plant – Crack Leak Sealing Repair

This newer water treatment plant has the capacity to meet the needs of the growing city’s population and industrial demands. It utilizes state-of-the-art technology to reduce seasonal taste and odor issues, treats for sulfates from Devils Lake discharges, and meets regulatory requirements related to pharmaceuticals, pesticides and herbicides. Located in a harsh climate, the Treatment Plant is an all indoor facility with multiple basins for the various processes of treatment.

A SealBoss Technical made a rush delivery of a P2002 Pro-Kit and NSF Drinking Water Contact Certified SealBoss Water Stop Foam to the North Dakota Water Treatment Plant where previous attempts to mitigate various leaks through concrete cracks had failed. SealBoss provided intensive on the job crack injection training for the in-house maintenance and repair team to provide them with product and application knowledge to be able to inject and leak-seal any cracks within the facility successfully.

The chlorine basin had developed cracks and water with minimal solids had been leaking from the bottom of the basin on to the pumps and other mechanical components. Previously, the leaking cracks had been unsuccessfully addressed by a contractor with a undisclosed product and were found to be covered with an epoxy paste.

Prior to injection with SealBoss hydro active hydrophobic polyurethane foam the face of the concrete needed to be cleaned and stripped back to bare concrete. Some leaking areas had previously been injected by drilling directly into the crack (which is not a recommended procedure for this type of application)  and were left unfinished with some ports or parts thereof still in place. The old remaining ports needed to be removed and the old drill holes were quickly and temporarily plugged with SealBoss 3/8” Hammer-in ports.

Once this was accomplished, new injection holes were drilled following the SealBoss 1, 2, 3, 45-Degree Injection Guidelines and starting roughly 6” from the center of the crack and placing packers in a staggered fashion. Under the job site conditions the SealBoss 45-Degree packer installation technique provided for much better product penetration and travel within the cracks and hairline fissures. Once all the holes were drilled the SealBoss Evolution 13-100AL aluminum packers were placed and the overhead injection began.

SealBoss NSF/ANSI 61 certified 1510 Water Stop Foam chemical grout is approved by the supervising  engineering firm for the crack and leak-seal repair on this project. The product was injected with the SealBoss P2002 high pressure single component injection pump system.

Within a short time the low viscosity SealBoss 1510 Foam was traveling through the cracks and began reacting. Refusal of the resin from the face of the crack was visible at distances far exceeding the next packer hole indicating very good penetration.

Utilizing the SealBoss 1, 2, 3, 45-Degree Injection Method with staggered packer placement, rather than drilling directly into the cracks, the low viscosity SealBoss 1510 chemical grout was able to travel much farther inside the cracks, hairline fissures and non-visible shrinkage cracks thus creating an immediate and permanent seal.

SealBoss provided intensive on-the-job crack injection training for the in-house maintenance and repair team and taught them all the product and application knowledge to be able to inject and leak-seal any cracks within the facility successfully.

fter several hours of on-site guidance, the facility’s repair team felt confident in devising a strategy to address the remaining cracks. They were also well-acquainted with the systems for anticipated future leak repairs.

• Case Study, pdf — Click Here