827Pavement Patching Mastic

827.1 General Description

This section includes the requirements for a single component pavement patching mastic material composed of a polymer modified asphalt binder and aggregate. The patching mastic will be used for sealing, filling and repairing distresses in both Asphaltic Concrete and Portland Concrete pavements and bridge deck surfaces that required more extensive repair than typical crack and joint sealing. This patching mastic material is not intended for use on distresses requiring plant produced asphaltic concrete mixture patching.

827.1.01 Related References

A. Standard Specifications Section 802 – Aggregates for Asphaltic Concrete Section 820–Asphalt Cement B. Referenced Documents AASHTO T 30 ASTM D 36 ASTM D 5329 (Modified)

827.2 Materials

827.2.01 Requirements

A. Modified Asphalt Binder The modified asphalt binder must meet the requirements established in Table 1. B. Aggregate The aggregate must be factory blended and meet the requirements established in Table 1. C. Pavement Patching Mastic (Combined Materials) The Pavement Patching Mastic must meet the requirements established in Table 1 and provide a well bonded, flexible, durable and traffic resistant repair when properly applied. Ensure packaging consist of cardboard boxes weighing approximately 40 pounds. Boxes must contain a quick melting release film covering that enables easy removal of product from the cardboard box. When purchased by the pallet, the units must be protected from the weather using a plastic pallet cover, with a minimum two layers of six-month U.V. protected stretch wrap. Pallets must be labeled with product name, part number, lot number and net product weight. TABLE 1—REQUIREMENTS FOR PAVEMENT PATCHING MASTIC COMPONENTS AND COMBINED MATERIAL Asphalt Binder Properties Test and/or Quality Characteristics Test Method Requirements Cone Penetration, 77 °F (25°C) (dmm) ASTM D 5329 - modified 60 maximum Cone Penetration, 122 °F (50 °C) (dmm) ASTM D 5329 - modified 120 maximum Softening Point, (°F) ASTM D 36 195 minimum Aggregate Properties Aggregates Must be factory blended to ensure a consistent and homogenous blend Gradation (%) AASHTO T 30 100 % passing 5/8 in. - Report Abrasion Resistance (%) ASTM C 131 25 % maximum - Report Pavement Patching Mastic Combined Material Tensile Adhesion, PSI, (kPa) ASTM D 5329 Modified (1) 25 PSI (172 kPa) with 0.5 in. (12.5 mm) minimum elongation Flexibility ASTM D 5329 Modified (2) No cracking or loss of aggregate adhesion Flow ASTM D 5329 Modified (3) 3 mm maximum Shelf Life 2 years minimum Heating/Application Pot Life 8 hours minimum - 12 hours maximum Notes: The specimen for the tensile adhesion is 75 mm length x 50 mm width x 37.5 mm thickness. The specimen is 150 mm length x 100 mm width x 20 mm thickness. The test is performed at 77 °F (25 °C) and the specimen is bent over a 25.4 mm mandrel to 180 degrees over 10 seconds. The specimen for the flow test is 60 mm length x 40 mm width x 13 mm thickness. Allow the specimen to cool for 1 hour at room temperature before removing from the mold. Allow the specimen to cool overnight prior seating on the base plate and starting the oven cycle. Seat the cooled specimen on the center of the base plate and mark a reference line around the specimen. Place the specimen in a 140 °F oven on a holding rack at a 75 ± 1-degree angle for 5 hours. Remove the specimen from the oven after 5 hours and measure any movement of the specimen below the reference line in millimeters. D. Fabrication and Application Ensure the pavement patching mastic component material is combined into a melter/applicator pot, heated, mixed and applied to the area requiring repair as recommended by the manufacturer. Ensure the material is heated no greater than 410 °F. Ensure that the equipment produces and maintains a homogenous mixture of modified asphalt binder and aggregates at a uniform temperature without gradation related or temperature related segregation in the pavement patching mastic. The material must provide a repair that can be opened to traffic once the pavement patching mastic has cooled and solidified. General Provisions 101 through 150. E. Acceptance At the request of the Department, pavement patching mastic material may be subject to project related testing for acceptance when field application and and/or actual in-place performance indicates the material does not meet its intended purpose. F. Materials Warranty General Provisions 101 through 150. G. Payment Pavement Patching Mastic is paid for at the Contract Unit Price per pound. Payment is full compensation for furnishing materials including polymer-modified bituminous materials and aggregate. Payment will be made under: Item No. 827 Pavement Patching Mastic, including polymer-modified bituminous materials and aggregate Per pound