How To Repair A Transfer Station Floor

Escambia County, Solid Waste Transfer Stations
Tipping Floor Repair, Re-topping, and Protection
Epoxy bulwark lining with Epoxytec 17G
October 2022
Certified Applicator: Cypress Construction & Coatings, Inc.

Municipal solid waste transfer stations across the earth have one thing in common, their tipping floors experience some of the worst corrosion in existence; a combination of ultra-high abrasion and wear coupled with deteriorating chemical attack due to leachate and microbial induced acid, not to mention the array of unidentified contaminants to kick. This of class was not different for Escambia County, Florida.

At the transfer station, garbage trucks cycle and constantly dump (tip) mounds of waste onto bare concrete floors, where bulldozer blades push button the pass up into bunkers for extraction.

During the process, corrosives saturate the concrete leaving it etched and weakened, while the blades follow through and expedite the wear to the already weakened physical.

To solve this, solid waste facilities consult with Epoxytec, a leader in tipping floor system solutions for ultra-high performance repair and rehabilitation.

Epoxytec is the manufacturer of the 17G organisation, a customized epoxy barrier slab for combating ultra-high wear and abrasion, while sealing and protecting the concrete as a liner against ponding leachate/h2o and therefore protecting the surroundings.

The video below demonstrates the typical process of the rehabilitation organisation:

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The Epoxytec 17G system was selected as a exclusive system for this project to be installed on half the flooring in 2022, and the other one-half later in the virtually future. For this blog, the first half is documented.

To successfully apply the arrangement as a sectional liner, an undercut was created into the existing slab to provide a flush transitional betoken of termination, so the that the dozer blades do not scrap a high exposed edge, but rather make a flush arroyo.

After creating the key way, undercut, the floor then needed to be prepared. The Epoxytec certified contractor utilized an Ultra-High Force per unit area H2o Jetting rig to blast. The UHP equipment non just blasts and etches concrete, but too rids all contaminants with 40,000psi of water, plenty to cut granite.

The UHP method is practical and effective, as it cleans and blasts all-in-one-shot. Attached is an optional "floor hog" add-on for blasting while overspray is being contained in a vacuum environment, therefore droppings doesn't effect the surrounding coiffure or equipment.

The picture below demonstrates the crawly nature of the blast, leaving a noticeable, clean and etched surface, ridding all loose concrete and removing all contaminants past deep and high pressure extraction. Doing this provides a surface to NACE Surface Grooming standards, SSPC-SP13/NACE No.6.

After diggings, the crew worked throughout the evening and rinsed with ultra-loftier temperature, high pressure water diggings to farther rinse and clean via deep penetrating steam.

Afterward the surface prep was completed, the rinse exposed a medley of cracks throughout the floor surface. To navigate through this setback, the experienced crew knew they needed to level these cracks before applying the 17G system. Using the resin-mix of the 17G with a small ratio of aggregate filler, provided a consistent slurry mix to make full the cracks in earlier application.

The cracks appeared in all sizes.

Beingness the the cracks were acquired from unknown reasons, the system had to address the potential of motility. Therefore, the crew decided to employ fiber-mesh within the slurry filler to gainsay and bridge any unforeseen movement that may occur in the hereafter.

Using fiber-rolls, the fabric was laid on top of the 17G resin filler and crack.

After which, the 17G resin was applied to embed the fiberglass.

Before applying the arrangement, priming was specified to assist in whatsoever out-gassing or and water vapor transmission (MVT) that may occur. Using the Epoxytec B2 Primer, a water-based epoxy primer, ensures the proper sealing of moisture and out-gassing before awarding of the epoxy 17G system.

The unabridged surface of the tipping floor to be lined by 17G is coated start with the B2 Primer . This waterborne primer has no VOCs, indicates top blanket readiness when it turns clear, and penetrates deep into the concrete surface crosslinking with the existing wet, as it is itself, water-based. In one case cured, the B2 Primer provides a the chemically sealed agglutinative enhancement with a sleeky stop to facilitate the application and glide for the top liner.

Once the primer is initially cures, the application of Epoxytec 17G can begin. The 17G is a highly filled, iii component, trowel-course epoxy liner, and when practical and cured provides anti-abrasive wearable resistance with incredible compressive properties of 17,800psi. The highly dense material cured to a heavy, epoxy slab like top liner which also provides chemical resistance and sealed barrier lining.

To get started with 17G, mixing logistics must showtime exist organized and decided upon. Typically, the textile can be mixed in a pre-proportioned kit with a ability drill. Even so, for large job, a mortar mixer provided a more than efficient method of mixing in volume.

Once mixed in volume, the material was transported with a unproblematic mitt cart and then poured onto the surface. The material needed to float, ultra-high build at a to the lowest degree ane/iv″ – 3/8″. Some floors, depending on the profile may even require more, such as i/2″ – i inch. For this project, the 17G was applied betwixt 3/eight″ – i/2″ in some areas.

Utilizing a pour-and-spread method, certain tools benefited the awarding crew well. These tools included an assortment of trowels and pin rakes. The 17G material, although trowel-grade, has an ability to blend in well, as the top surface does settle a fleck to help convalesce small inconsistencies.