Pavement repair compositions, kits, and methods
The invention relates to a product and method for repair of roadway or pavement damage such as potholes, concrete/asphalt joints, and other damage to paved surfaces. The product can be adjusted in terms of the cure time of the product, allowing the user to customize the product for best use in the particular repair being made. Fast cures can be obtained of 5 minutes or less, suitable for quick repair of a small defect in pavement, or the cure time can be extended to 60 or more minutes, suitable for larger projects that can take many hours to complete. The product, when mixed, handles like easily pourable concrete mix, but acts like a hot mix repair when cured.
1 . A method for repairing a damaged area of a substrate selected from asphalt, concrete, or a combination thereof, the method comprising
providing a roadway repair kit comprising
a first container comprising a pre-mix composition,
a second container comprising one or more aggregate compositions,
a third container comprising one or more radical initiators, and
a fourth container comprising N,N-dimethyl-p-toluidine;
determining an ambient temperature at a damaged area;
determining an expected cure time for an unmodified composition for the roadway repair, the unmodified composition comprising a combination of all components of the first container, the second container, and the third container at the ambient temperature;
determining a preparation time required to mix all components of the first container, the second container, and the third container to produce the unmodified composition for roadway repair;
determining a pour time required to pour the unmodified composition for roadway repair into the damaged area;
determining a required cure time, wherein the required cure time is greater than a sum of the preparation time and the pour time;
comparing the required cure time to the expected cure time;
if the expected cure time is greater than or equal to the required cure time,
preparing the unmodified composition for roadway repair, and
filling the damaged area with the unmodified composition for roadway repair;
if the expected cure time is less than the required cure time,
preparing a modified composition for roadway repair by mixing all components of the first container, the second container, the third container, and the fourth container, and filling the damaged area with the modified composition for roadway repair;
wherein the pre-mix composition comprises:
a) about 25 wt % to about 51 wt % of a solution containing about 20 wt % to about 30% of one or more acrylic or methacrylic polymer precursor binder compounds;
b) about 18 wt % to about 74 wt % of one or more fillers;
c) about 14 wt % to about 57 wt % of silica sand;
d) about 0 wt % to about 2.25 wt % of one or more pigments, and
e) about 0 wt % to about 2 wt % percent by weight of one or more rheology additives.
2 . The method of claim 1 , wherein the composition for roadway repair cures within a time of from 1 to 10 minutes, after which the substrate is ready to be driven upon.