Patch and method for repairing asphalt pavement

Abstract

A patch and a method for repairing an asphalt pavement are provided. The patch includes a first asphalt layer having first and second bonding surfaces opposite to each other, a second asphalt layer having third and fourth bonding surfaces opposite to each other, the third bonding surface of the second asphalt layer facing the second bonding surface of the first asphalt layer, a textile layer disposed between the second bonding surface of the first asphalt layer and the third bonding surface of the second asphalt layer, and a crushed stone layer disposed on the first bonding surface of the first asphalt layer. A pothole of an asphalt pavement may be repaired quickly by using the patch according to the present disclosure. Moreover, the patch according to the present disclosure may not pollute environment around roads.

What is claimed is: 
     
         1 . A patch for repairing an asphalt pavement, comprising:
 a first asphalt layer having first and second bonding surfaces opposite to each other;   a second asphalt layer having third and fourth bonding surfaces opposite to each other, the third bonding surface of the second asphalt layer facing the second bonding surface of the first asphalt layer;   a textile layer disposed between the second bonding surface of the first asphalt layer and the third bonding surface of the second asphalt layer; and   a crushed stone layer disposed on the first bonding surface of the first asphalt layer.   
     
     
         2 . The patch of  claim 1 , further comprising a release layer disposed on and covering the fourth bonding surface of the second asphalt layer. 
     
     
         3 . The patch of  claim 1 , wherein the textile layer includes an alkali-resistant glass fiber mesh or a basalt fiber bidirectional cloth. 
     
     
         4 . The patch of  claim 1 , wherein the textile layer has a thickness in a range of 1 to 2.5 mm, and the first asphalt layer, the second asphalt layer and the textile layer have an entire thickness in a range of 2 to 4.5 mm. 
     
     
         5 . The patch of  claim 1 , wherein the crushed stone layer includes crushed stones each having a particle size in a range of 1.18 to 4.75 mm, and has a coverage rate of 75% to 95% on the first bonding surface of the first asphalt layer. 
     
     
         6 . The patch of  claim 1 , wherein the crushed stone layer has a thickness in a range of 1 to 5 mm. 
     
     
         7 . The patch of  claim 1 , wherein the release layer includes a polyethylene blown thin film, and has a thickness equal to or less than 0.05 mm. 
     
     
         8 . The patch of  claim 2 , wherein the patch has a thickness in a range of 5 to 8.5 mm. 
     
     
         9 . A method for repairing an asphalt pavement, comprising:
 pretreating an area of the asphalt pavement to be treated, according to distress characteristic of the asphalt pavement; and   laying a patch on the pretreated area of the asphalt pavement, and tamping the patch, wherein the patch comprises:
 a first asphalt layer having first and second bonding surfaces opposite to each other; 
 a second asphalt layer having third and fourth bonding surfaces opposite to each other, the third bonding surface of the second asphalt layer facing the second bonding surface of the first asphalt layer; 
 a textile layer disposed between the second bonding surface of the first asphalt layer and the third bonding surface of the second asphalt layer; and 
 a crushed stone layer disposed on the first bonding surface of the first asphalt layer. 
   
     
     
         10 . The method of  claim 9 , wherein the pretreating comprises:
 spraying a curing agent to the area of the asphalt pavement to be treated when the distress characteristic of the area of the asphalt pavement to be treated has a partially loose state, or filling the area of the asphalt pavement to be treated with a sealant when the distress characteristic of the area of the asphalt pavement to be treated includes a crack having a width greater than 5 mm or a depth greater than 10 mm; and   applying an adhesive on the area of the asphalt pavement to be treated.