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Concrete Contractors Phoenix

Dec 1

What are the methods of concrete crack repair?

Crack repair phoenix contractors have many options, including epoxy injection, grouting, sealing, grouting and stitching, grouting and drilling, as well as gravity filling concrete fractures.

 

These strategies are used to select the best methods for different types of concrete cracks.

 

Concrete Crack Repair Techniques

 

  • Epoxy injection



The epoxy injection procedure (0.05 mm) is used for fissures smaller than 0.002 inches. The basic steps include establishing entrance and venting openings at regular intervals along with fractures, sealing cracks on exposed surfaces, and injecting epoxy under pressure.

 

The effectiveness of epoxy injection in repairing fractures in concrete structures such as bridges, buildings, dams, and other concrete structures has been remarkable. It is important to address the source of cracking as it can cause further cracking.

 

Procedure for injecting epoxy

 

  • Cracks must be treated.



Clean up contaminated cracks to the extent that it is practical and practicable. Oil, grease, and small concrete particles can inhibit epoxy's ability to bond and penetrate, which reduces repair effectiveness. It is best to vacuum or flush out any accumulated contaminants with water or other suitable cleaning agents.

 

  • Seal all surfaces.

 

Surface fractures must be filled to prevent the epoxy from leaking before it has fully gelled. If the crack is too large to be filled, but the slab-on-grade or backfill is available, this may suffice to seal the crack.

 

  • Sealing cracks can be done by applying epoxy, polyester, or another suitable sealing substance to their surface. After it hardens, you can seal them with a tacky adhesive. If a crack's surface is dull or has a glossy appearance, a strippable plastic sealer can be applied.

 

Assemble the exit and entrance ports as follows



There are three options:

 

  • Fittings into drilled holes: This was the first procedure and is often used in conjunction with crack V-grooving. Drilling a hole in the crack with a diameter 3/4 inch. (20 mm) and 1/2 to 1-inch depth. The method is from 13 to 25mm below the V-grooved section's apex.

 

  • If cracks are not V-grooved, bonding a flush fitting with concrete over cracks is a way to provide an entry point. The flush fitting is designed to allow for the glue to be injected at the top, and has a flange that connects to concrete at the bottom.

 

  • You can also remove the seal from the crack. This method is possible when special gasket devices are available that cover the fracture and allow for the injection of glue directly into the crack. Combine the epoxy with the water.

 

  • This can be done in either continuous or batch procedures. Mixing the adhesive components in a batch fashion is called batch mixing. This is usually done with a mechanical stirrer that looks like a paint mixer paddle.

 

  • Before you begin the gelling process, make sure to only use the maximum amount of glue.



Inject the epoxy resin.

 

Hydraulic pumps, paint pressure pots, or air-actuated caulking guns are all options. It is important to choose the right injection pressure. An increase in pressure doesn't always improve the injection rate.

 

If cracks are sloped or vertical, you can inject epoxy at the lowest elevation into the entry port and work your way up to the entry port higher.

 

Horizontal cracks should be injected in the same way from each end. The crack will be filled if the pressure is maintained. If the pressure is not maintained, epoxy will flow into the crack or seep out.



Take off the sealant

 

When the epoxy has hardened, the surface seal should be removed by grinding or any other means.

 

  • Optional procedure

 

A series of holes are drilled, usually 7/8 to 4 in. An alternative method for large structures is to drill a series of holes [usually 7/8 to 4-in. Holes are usually located at intervals of 5 feet (1.5 meters). Another method recently adopted is the vacuum or vacuum assist approach.

 

  • Crack Routing and Sealing

 

Crack routing and sealing may be used in situations where structural repair is not possible. This involves expanding the fracture along its exposed side, filling it using a suitable joint sealant, and sealing it.

 

This common method of treating cracks is relatively simple compared to epoxy injection. This method is good for horizontal surfaces with a flat surface, such as pavements and floors.



 

Phoenix Concrete Contractors

Phoenix, Az

(480) 992 5070