Method for bonding prepared substrates for roadways using a low-tracking asphalt emulsion coating
AssigneeBlacklidge Emulsions, Inc.
InventorRoy B. Blacklidge
Life of this patent
Estimating the term…
Abstract
A method for bonding together an existing substrate layer and a pavement layer, such that a strong adhesive bond is formed by using a tack coat, provided by an asphalt emulsion, in between the layers as the bond coat. The tack coat layer is a low-tracking coating which cures quickly such that the pavement layer may be applied to the substrate, hours to days after the emulsion is applied to the substrate. The asphalt emulsion comprises at least a first phase of from about 30% to about 70% of an asphalt composition, about 30% to about 70% water, and about 0.1% to about 3.0% emulsifying agent, stabilizer and/or additives, or 0.1% to about 30% if polymeric or other additives are also included.
Claims33
A method for bonding a layer of asphalt pavement material comprising asphalt material to a substrate pavement layer comprising paving material, the paving material selected from the group consisting of asphalt material, soil, clay, sand, shell, cement, limestone, fly ash and mixtures thereof, the method comprising:
- providing an emulsified composition which includes at least a first phase of an asphalt composition, a second phase of water, emulsifier and a stabilizer, the asphalt composition selected to provide a coating having a penetration value less than about 20 dmm and a softening point greater than about 140° F. (60° C.) when applied to the substrate pavement layer and cured;
- applying the emulsified composition which includes the first phase of asphalt composition, and the second phase of water, emulsifier and stabilizer to an exposed surface of the substrate pavement layer at a rate sufficient to provide an exposed coating on the exposed substrate surface, the emulsified composition having an amount of the asphalt composition effective to bond the layer of asphalt pavement material to the substrate pavement layer;
- heating the asphalt pavement material to provide a heated pavement material to a temperature sufficient to soften the coating an amount effective to form a bonding surface on the exposed coating;
- and
- applying the heated asphalt pavement material to the exposed coating to form a pavement layer and to soften the exposed coating forming a bond between the pavement layer and the substrate pavement layer.
A method for forming a low-tracking tack coating capable of bearing traffic without significant loss of bonding strength on a substrate pavement layer and paving the substrate pavement layer with an asphalt pavement material, the substrate pavement layer comprising paving material, the paving material selected from the group consisting of asphalt material, soil, clay, sand, shell, cement, limestone, fly ash and mixtures thereof, the method comprising:
- providing an emulsified composition which includes at least a first phase of an asphalt composition, and a second phase of water, emulsifier and a stabilizer, the asphalt composition selected to provide a coating having a penetration value less than about 20 dmm and a softening point greater than about 140° F. (60° C.) when applied to the substrate pavement layer and cured, the asphalt phase comprising from about 30% to about 70% of the total weight of the emulsified composition and the second phase comprising from about 30% to about 70% of the total weight of the emulsified composition;
- applying the emulsified composition to an exposed surface of the substrate pavement layer at a rate sufficient to provide an exposed coating on the exposed surface, the emulsified composition having an amount of the asphalt composition effective to bond the asphalt pavement material to the substrate pavement layer;
- exposing the coating to the atmosphere for not more than about sixty minutes to provide a cured coating, the curing effective to permit traffic to pass over the cured emulsified composition without the cured coating substantially adhering to tires of the traffic;
- heating the asphalt pavement material to provide a heated pavement material to a temperature of greater than about 140 degrees F. and sufficient to soften the cured coating an amount effective to form a bonding surface on the exposed coating;
- and
- applying the heated asphalt pavement material to the cured coating to form a pavement layer and to soften the cured coating forming a bond between the pavement layer and the substrate pavement layer.
A pavement structure comprising a substrate pavement layer comprising paving material selected from the group consisting of asphalt material, soil, clay, sand, shell, cement, limestone, fly ash and mixtures thereof, at least one layer of asphalt pavement material, and at least one bonding layer between the substrate pavement layer and the asphalt pavement layer, the bonding layer formed from an application of an emulsified composition having at least a first phase of an asphalt composition, a second phase of water, emulsifier and a stabilizer the asphalt composition selected to provide the bonding layer with a penetration value less than about 20dmm and a softening point greater than about 140° F. (60° C.) when cured.
A method for bonding a layer of asphalt pavement material comprising asphalt material to a substrate pavement layer comprising paving material, the paving material selected from the group consisting of asphalt material, soil, clay, sand, shell, cement, limestone, fly ash and mixtures thereof, the method consisting essentially of:
- providing an emulsified composition which includes at least a first asphalt phase of an asphalt composition, a second phase of water, emulsifying and stabilizing additives, the asphalt composition selected to provide a coating having a penetration value less than about 20 dmm and a softening point greater than about 140° F. (60° C.) when applied to the substrate pavement layer and cured, the asphalt phase comprising from about 30% to about 70% of the total weight of the emulsified composition and the second phase comprising from about 30% to about 70% of the total weight of the emulsified composition;
- applying the emulsified composition which includes the first phase of asphalt composition, and second phase of water, the emulsifying additive and the stabilizing additive to an exposed surface of the substrate pavement layer at a rate sufficient to provide an exposed coating on the exposed surface, the emulsified composition having an amount of the asphalt composition effective to bond the asphalt pavement material layer to the substrate pavement layer;
- curing the exposed coating of emulsified composition for not more than about sixty minutes to provide a cured coating, the curing effective to permit traffic to pass over the cured emulsified composition without the cured coating substantially adhering to tires of the traffic;
- heating the asphalt pavement material to provide a heated pavement material to a temperature of greater than about 140 degrees F. and sufficient to soften the cured coating an amount effective to form a bonding surface on the exposed coating;
- and
- applying the heated asphalt pavement material to the cured coating to form a pavement layer and to soften the cured coating forming a bond between the pavement layer and the substrate pavement layer.
Dependencies are inferred from the claim text.