For Immediate Release
Repairing cracked, spalled and broken concrete has always been a dusty, noisy and time- consuming job. Even for minor repairs, prep and cure times can take hours, especially in coolers and freezers. Roadware Inc., manufactures two-part, high-speed polyurethane, called 10 Minute Concrete Mender ™ it eliminates most of the noisy, dusty, prep work and provides permanent repairs in minutes. Works at-40°F and is an absolute must in repairing thresholds.
Concrete Mender boasts a penetrating viscosity of 8.6 Cps. It is wetter-than-water. It can penetrate into frozen base concrete and holds bond indefinitely. It is estimated that over 10 million linear feet of cracked and broken concrete are repaired each year with Concrete Mender and the failure rate, even after years of service, is close to zero.
Scanning electron microscopy was used to unlock the bonding secrets of 10 Minute Concrete Mender™. The Department of Civil Engineering, University of Illinois at Urbana-Champaign recently performed the tests, under the direction of Prof. David A. Lange. His summary reads in part:
The microstructure of the interface between Concrete Mender and concrete substrate indicates that a high quality bond is achieved. The success ofConcrete Mender is due to the compatibility of Concrete Mender with concretematerials. The fresh liquid has a low viscosity and a low surface tension that allows capillary forces to draw Concrete Mender into the pore structure of the concrete. Experiments indicate that repairs using Concrete Mender fully engage the underlying substrate. The shrinkage of Concrete Mender is low and should not pose concern for debonding or delamination due to volume changes. The Modulus of Elasticity of Concrete Mender, as with almost all-polymeric materials, is lower than that of concrete. The strength of Concrete Mender is on the order of concretes used in construction. It is reasonable to expect that repairs with Concrete Mender largely restore the structural performance of the original concrete.
Duplex cartridges and static mixing technology are employed to deliver ratio-mixed, 10 Minute Concrete Mender to the repair site. Used neat as a low viscosity liquid or extended with sand, hairline cracks and trench wide repairs can be made with equal ease in the same ten-minute time frame. Using this repair system, labor savings of 80% are possible over conventional repair materials and practices.
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