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Roadware 10 Minute Concrete Mender™ and Easy-injection mixers make full depth crack repairs in hairline cracks without cutting. This less evasive crack repair technique breaks the rules for concrete repair.
Lets look at these, “rules” one by one.
Broken Rule One: Hairline cracks are not worth the trouble fixing. Did you know that just about every crack in concrete started out as a hairline crack? Some so fine, you can not even see them with the naked eye. Cracking naturally occurs in concrete slabs as the concrete cures and shrinks. We use saw cut control joins to encourage the concrete to crack inside the saw cut or tooled joints. The problem is, the concrete doesn’t always listen and can crack where it wants to crack. We don’t like it, but that’s just the way it is. The truth is, we would fix hairline cracks if there was a good and efficient way to do it. Most of the time, we ignore hairline cracks and blame them on the nature of concrete and say things like, “It will be fine, you still have aggregate interlock and the crack is just on the surface.” Or, “All concrete cracks, and its just the nature of the product… Check out our new floor covering selection.” The customer, who just invested in a new concrete floor, is never happy with these explanations.
The truth is, we would fix hairline cracks if there was a good and efficient way to do it.
Broken Rule Two: You have to cut open crack if you really want to repair it. A repair material has to actually get into a crack so it will actually do some good. Anything short of that is no better than caulk. For the most part, this is true. We can’t repair what we can’t reach. Traditional cut and cover techniques us a diamond blade saw to open up a crack, forming a shallow well for Concrete Mender to accumulate and flow down into the crack. It works really well and Roadware has been doing this for over twenty years.
What is needed is a way to actively push repair products into hairline cracks. With a few simple techniques and Easy Injection Mixers, Roadware 10 Minute Concrete Mender can do the job. That brings us to:
Broken Rule Three: Crack injection requires pumps, ports, slow epoxy, and lots of time.
For a successful crack injection repair you need to accomplish three things:
Roadware Easy Injection mixers make getting Concrete Mender cracks as small as 20 mil (0.02 inches) simple. Just drill a 3/8 inch hole into the crack and push the nearly water thin Concrete Mender into the cracks. You can actually watch the Concrete Mender flow along the length of the hairline crack. Leave the expensive injection pumps in the shop. A cartridge of Concrete Mender and a manual application gun is all you will need.
Roadware 10 Minute Concrete Mender starts to thicken and cure in about 5 minutes after application, so the material will stay where you put it. Traditional injection epoxies take hours to cure. In many cases, at the end of the day, the epoxy all ends up under the slab and no longer in the crack.
Roadware 10 Minute Concrete Mender™ with Microdoweling™ penetrates traditional bond lines and repairs concrete from the inside out. This structural polyurethane will not become brittle over time. Epoxy injection resins become very hard and brittle. As the the concrete deflects under traffic, the brittle epoxy will start grinding away at the bond-line and the deterioration will start all over again. Roadware 10 Minute Concrete Mender is designed to restore aggregate interlock and deflect with the concrete under heavy traffic and loading. This structural polyurethane will not become brittle over time and is designed to bring the cracked concrete back to original pre-cracked condition.
Bill Neal of Neals Design recently repaired spalled and cracked concrete on the fly at a service station in Washington. A customer had broken an ankle stepping out of a truck into the badly spalled concrete. Bill was able to make the repair in minutes, eliminating the safety hazard without major disruption to the service station.
Roadware 10 Minute Concrete Mender is your go to product for making long-lasting repairs with minimal downtime. At 70 degrees F or 21C, A Concrete Mender repair can be ready for heavy truck traffic in about 10 minutes.
The ultra low viscosity Concrete Mender mixes very easily with manufactured sand or quartz. A tough and durable polymer concrete mortar can be mixed in a bucket by hand with simple tools. No expensive pumps or power mixers needed. See how it is done here. Concrete Mender™ Bulk Application Instructions
The Busan Transportation Corporation uses Roadware 10 Minute Concrete Mender to repair the roll-way of Busan Metro Line 4 in South Korea. Metro Line 4 is a rubber-tired line with 14 stations and runs driverless with pneumatic tires on a 6.7 mile (10.8km) concrete track. Concrete Mender is used to structurally repair the cross joints in the track approximately every ten meters.
Concrete Mender is the right product for the job because it has a long service life and cures in about 10 minutes. This allows for minimal down time and keeps the Busan Metro Line 4 running on time with minimal service interruption.
Repair crews of a very limited repair window, The train operates approximately 20 hours per day from 5am to 1am the next day. That leaves a minimal amount of time for maintenance and repair operations. Crews have to be efficient and productive. The fast cure and rapid strength gain of 10 Minute Concrete Mender is well suited for these mission critical applications.
Having a smoother roll-way saves wear and tear on the rubber tires and reduces operating costs. Roadware 10 Minute Concrete Mender will keep the Busan Metro Line 4 running smooth and efficiently for years to come.
Roadware 10 Minute Concrete Mender is a self-injecting structural polyurethane for the permanent repair of commercial floors, decks, slabs and surfaces. The exclusive Microdoweling™ action in Concrete Mender allows it to migrate past bond lines, restore aggregate interlock and make long lasting repairs.
Click here to request more information of find a local Roadware distributor.
Click here to request more information or find a local Roadware distributor.
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.
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.
Roadware is exhibiting at the CP&S show in Milwaukee on October 20-22, 2016 in booth #
119. NOW #219
The International Concrete Polishing & Staining Conference and Expo is the only event of its kind specifically designed for concrete polishing professionals. This show offers 20+ conference sessions, an Exhibit Hall featuring polishing equipment and products, slab demonstrations and more.
To take advantage of our exclusive VIP offer for free access to the CP&S Exhibit Hall, simply enter promo code RINC when registering online. We look forward to seeing you at the show! P.S. Be sure to check out the CP&S Conference, offering more than 20 technical and business management sessions geared specifically for concrete polishing professionals!
On Wednesday, October 19 … CP&S is offering Brad Humphrey’s All-Day Leadership Boot Camp for contractor owners and employee leaders in ANY construction business. With more than 35 years in the industry, Brad is a veteran construction contractor and coach who is in high demand throughout the industry. Don’t miss this intensive, all-day coaching session to help you take your company to the next level!
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.
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.
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.
Step 1: Remove VCT, Ceramic, or vinyl floor coverings.
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.
Step 3: Chip out the concrete between the saw cuts. Clean the surface well with a wire brush and vacuum.
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.
Step 5: Replace the floor treatment and open to store traffic.
Repairing seasonal pop-outs in stamped and colored concrete is easy with MatchCrete™ Clear. Just add some powered pigment or grout to the clear MatchCrete™ aliphatic polyurethane and you can match most any color. Come back after 24 hours and give the repairs a light sanding to blend them in. See the short video below.
Less Evasive Concrete Repair
Reducing worker exposure to silica dust is an OSHA and job site priority.
“Workers may be exposed to dangerous levels of silica dust when cutting, drilling, grinding, or otherwise disturbing materials that contain silica. These materials and tasks are common on construction jobs. Breathing that dust can lead to serious, often fatal illnesses.” The Center for Construction Research and Training. Click here to learn how to work safely with silica.
With Roadware 10 Minute Concrete Mender™, you can make excellent crack and spall repairs with much less cutting and grinding. Standard preparation for most concrete repair products calls for invasive actions from square cutting and removal to deep cutting, grinding and sandblasting. Aggressive preparation is necessary for standard repair material like epoxy and polyureas. They are too thick to penetrate and bond to compromised concrete surfaces. Roadware 10 Minute Concrete Mender™ has an extremely low viscosity of less than 8cps when applied with a surface tension one third of water. Concrete Mender™ can penetrate and bond concrete surfaces where other materials will fail.
Many concrete crack repairs can be made with Concrete Mender™ with just a light scoring with variable speed diamond grinder. This reduces dust production by nearly 70% over conventional methods.
In some situations, cracks can be repaired directly with only a shop vacuum used to remove dirt and dust. Roadware’s needle tip application mixers are great for getting Concrete Mender™ into small cracks in fissures.
A wire wheel can be used for preparing cracks and spalls. We recommend using a variable speed grinder with a twisted wire wheel. This generates less dust than diamond blades and still does a good job preparing the crack for a Concrete Mender repair.
After the crack or spall is repaired, grinding and buffing to make the repair flush can be made using wet methods in just 10 minutes after application when using Concrete Mender™. Other low dust methods include razor scrapping and dustless grinding equipment.
Whenever cutting or grinding concrete, have a plan to keep harmful dust away from workers and bystanders. Using Roadware 10 Minute Concrete Mender™ with these minimal evasive techniques can help keep dust exposure to a minimum.