Tag Archives: crack

Amazon Warehouse – Full depth crack repair without sawing.

Full depth crack repair in warehouse floors usually involves cutting open the cracks with dry diamond saws. This is a slow process and creates a lot of hazardous silica dust that needs to be mitigated. Repair contractors at an Amazon Warehouse project are using an innovative way to repair cracks in the floor without the traditional cut and fill methods. 

The problem:

Some people question why these types of cracks should be repaired. Cracked floors in industrial and commercial settings are a liability.  The cracks will continue to get larger as wheeled traffic starts to crush the sidewalls. (More) Cracks will also fill with dirt and debris creating a hard to clean surface. Roadware 10 Minute Concrete Mender™ is a structural polyurethane that will restore load transfer and can bring a floor back to original serviceability. 

Thre level Amazon Warehouse with cracks in the floor.

This three level Amazon Warehouse developed thousands of linear feet of shrinkage cracks prior to being places into service. Roadware 10 Minute Concrete Mender will be used to repair them.

 

Crack in warehouse floor.
This floor presented thousands of feet of shrinkage and stress cracking. The cracks were all fairly clean without excessive foreign debris or dirt at time of repair. 

The Plan:

Use sacrificial vinyl weatherstrip to make a dam parallel to the cracks that will hold Roadware 10 Minute Concrete Mender™ in place while it soaks down into the cracks. Concrete Mender™ is nearly water thin when mixed and will flow easily deep into open cracks. Since Concrete Mender™ will start to gel up in 5-7 minutes, it will naturally self-seal the bottom of the crack as it cures. It sometimes takes three of four light pours of material, but it will fill the crack completely and start the structural Microdoweling™ process. Microdoweling™ is how Concrete Mender™ uses low surface tension and molecular attraction to penetrate concrete surfaces and locking into the aggregate and rock matrix. 

 

No cut full depth crack repair with Roadware 10 Minute Concrete Mender™.
No-cut crack repair with Roadware 10 Minute Concrete Mender™ uses removable peel-and -stick weatherstrip to form a temporary well that holds the Concrete Mender in place while it soaks down into the crack.

 

Roadware 10 Minute Concrete Mender injected deep into cracks using the Roadware Easy Injection System.
Roadware 10 Minute Concrete Mender injected deep into cracks using the Roadware Easy Injection System.

 

Amazon Warehouse full depth crack repair without cutting.
Wehtherstrip is used to hold Roadware 10 Minute Concrete Mender in place while it soaks deep into cracks.

Application:

With Concrete Mender™, expensive pumps and equipment is not needed. Once cracks are vacuumed and the surface is cleaned. The weatherstrip dam can be applied. Roadware 10 Minute Concrete Mender™ can be mixed on one gallon batches by hand in a bucket and poured directly into the cracks.  Additional manufactured sand can be added for larger cracks, but it is not recommended for this type of repair.  See more here: Concrete Mender Bulk Application Instructions 

Pour equal parts A and b into a mixing container and mix for about 15 seconds with a mixing stick.

 

Amazon Warehouse full depth crack repair without cutting.
Crack repairs are filled with Roadware 10 Minute Concrete Mender to refusal and the excess is removed.

When the Concrete Mender™ cures in about 10 Minutes at 72 degrees F (21C) , the weather stripping and excess material can be shaved clear or ground smooth with standard equipment. 

Amazon Warehouse full depth crack repair without cutting.
Roadware 10 Minute Concrete Mender filles hairline cracks completely using the dam and flood method. No cutting is needed.

 

After buffing and clearing excess material, floors can be returned to service immediately. 

Amazon Warehouse full depth crack repair without cutting.

Finished concrete crack repair blend in nicely at an Amazon warehouse using full depth Roadware 10 Minute Concrete Mender™.

Additional buffing and service traffic will blend the repairs even more into the surrounding concrete. 

Roadware 10 Minute Concrete Mender Technical Data Sheet

Download PDF:  

Concrete Mender™ TDS

Product used in the project:

80020 Roadware 10 Minute Concrete Mender Two-Gallon Kit
80020 Roadware 10 Minute Concrete Mender Two-Gallon Kit

80020 Roadware 10 Minute Concrete Mender Two-Gallon Kit

80050 Roadware 10 Minute Concrete Mender Ten-Gallon Kit
80050 Roadware 10 Minute Concrete Mender Ten-Gallon Kit

80050 Roadware 10 Minute Concrete Mender Ten-Gallon Kit

 

Busiest Cargo Gateway Airport in the World uses Flexible Cement II – HKG Hong Kong China

The Hong Kong International airport HKG is home to the world’s busiest cargo gateway airport. In 2015, HKG moved over 4.38 million metric tonnes of air cargo.  It is also one of the world’s business passenger airports accommodating over 68 million passengers that same year.

HKG Airport at night
HKG Airport at night

Operations at the world’s busiest cargo airport run 24/7/365 without stopping. Maintenance crews need a crack and joint repair material that can be applied in a wide range of conditions and be ready for service in minutes. Roadware Flexible Cement II  is a tough polyurethane crack repair material that can be applied at any ambient temperature. It bonds very well to distressed concrete and forms a tough semi-elastic polymer that will withstand heavy airline traffic in about 15 minutes. Crews at HKG airport have relied on Roadware Flexible Cement II to make repairs whenever and wherever needed for over 5 years.

Maintenance workers repair the taxiway with Roadware Flexible Cement II.
Maintenance workers repair a taxiway at night with Roadware Flexible Cement II.

 

Crews use Roadware Flexible Cement II in 600ml cartridges to quickly repair concrete cracks in a taxiway at HKG airport.
Crews use Roadware Flexible Cement II in 600ml cartridges to quickly repair concrete cracks in a taxiway at HKG airport.

 

HKG crews use Flexible Cement II to seal cracks near an in-ground refueling port in damp conditions.
HKG crews use Flexible Cement II to seal cracks damp conditions.

 

Roadware Flexible Cement II™ 300x300ml cartridge Item #91300
Roadware Flexible Cement II™ 300x300ml cartridge Item #91300

 

 

Crack Repair Under VCT or Laminate Flooring

Use Concrete Mender™ to repair  cracks, joints and curling slabs under VCT or tile floors. The permanent performance and 10 minute cure turns this 2 day job into a one day (or one night) job. Keep business running with minimal down time.

Repairing control or contraction joints under VCT.
Repairing contraction joints under VCT.

For spalled or failed control joints that are reflecting through the tile and the slabs are not curled, clean out the joints with a dust collecting diamond grinder.

Control or contraction joints repaired with 10 Minute Concrete Mender™ under VCT.
Control or contraction joints repaired with 10 Minute Concrete Mender™ under VCT.

Repair the control joints with Roadware 10 Minute Concrete Mender™, grind the surface flush and replace the tile.

 

For curled and buckled slabs, a major retailer specifies this heavy duty solution. This is the ultimate fix it once and fix it forever repair.

crack-repair-concrete-mender-vct-flooring_03

Step 1: Remove VCT, Ceramic, or vinyl floor coverings.

 

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Step 2: Saw cut parallel lines to the crack at a depth of no less than 1.5 inches. Ideally 30% of the slab depth.

 

crack-repair-concrete-mender-vct-flooring_08

Step 3: Chip out the concrete between the saw cuts. Clean the surface well with a wire brush and vacuum.

 

crack-repair-concrete-mender-vct-flooring_10

Step 4: Add Roadware 10 Minute Concrete Mender and Sand to the finished grade. Also use Concrete Mender to repair the underlaying crack. See Concrete Mender™ Bulk Application Instructions.

 

crack-repair-concrete-mender-vct-flooring_13

Step 5: Replace the floor treatment and open to store traffic.

 

 

Roadware 10 Minute Concrete Mender™ Top Applications

Roadware 10 Minute Concrete Mender™ top applications:

General full depth crack repair:

Use the high-penetration abilities of Roadware 10 Minute Concrete Mender™ to make full depth crack repair.

 

CRACK REPAIR

1. Clean out with diamond grinder and remove dirt and dust.
2. Flood with Roadware 10 Minute Concrete Mender™
3. Add a fine graded silica sand and additional liquid to grade.
4. Strike off excess material and allow to cure for 10 minutes at 70°F.
5. Open to traffic. Finish and blend with a grinding stone if desired.

 

SPALL REPAIR

1. Clean out with diamond grinder and remove dirt and dust.
2. Flood with Roadware 10 Minute Concrete Mender™
3. Add a fine graded silica sand and additional liquid. Work in one inch lifts to grade.
4. Strike off excess material and allow to cure for 10 minutes at 70°F.
5. Open to traffic. Finish and blend with a grinding stone if desired.

HAIRLINE CRACKS

1. Score the top of the crack with diamond blade or wire brush.
2. Remove dust with a vaccume.
3. Flood with Roadware 10 Minute Concrete
Mender™ supplied in twin cartridges and optional needle tip mixer.
4. Add a fine graded silica sand to larger areas and allow to soak in.
5. Strike off excess material and allow to
cure for 10 minutes at 70° F.
6. Open to traffic. Finish and blend with a
grinding stone if desired.

SPALLED CONTROL JOINT

(Fully cured non-moving)
1. Clean out with diamond grinder and remove dirt and dust. Score back spall with blade for a finished look.
2. Flood with Roadware 10 Minute Concrete Mender™
3. Add a fine graded silica sand and additional liquid to grade.
4. Strike off excess material and allow to cure for 10 minutes at 70°F.
5. Open to traffic. Finish and blend with a grinding stone if desired.

DELAMINATED SLAB

1. Drill hole into void.
2. Remove dust with a vacuum.
3. Flood with Roadware 10 Minute Concrete
Mender™ supplied in twin cartridges.
4. Add a fine graded silica sand and
additional liquid to fill holes to grade.
5. Strike off excess material and allow to
cure for 10 minutes at 70° F.
6. Open to traffic. Finish and blend with a
grinding stone if desired.

THRESHOLDS AND
UNEVEN SLABS

1. Clean out with diamond or wire grinder and remove dirt and dust. Score lower edge with diamond blade for a finished look.
2. Flood with Roadware 10 Minute Concrete Mender™
3. Add a fine graded silica sand and additional liquid to a mortar consistency.
4. Shape with a clean steel trowel and allow to cure for 10 minutes at 70° F.
5. Open to traffic. Finish and blend with a grinding stone if desired. Maintain existing expansion joint if necessary.