180-26 - Exhibit A. CDBG 2025 SPECS_compressed.pdf

Procedure. Perform the following steps: 1. Sample Preparation. a. Laboratory Molded Specimens - Use cylindrical specimens that have been compacted using the gyratory compactor (AASHTO T 312). Specimen diameter must be 6 inches (150 mm) and a specimen height must be 4.5 inches +/- 0.2 inches (115 +/- 5 mm). Note 1 - Experience has shown that molded laboratory specimens of a known density usually result in a greater density (or lower air voids) after being trimmed. Therefore, it is recommended that the laboratory technician produce molded specimens with an air void level slightly higher than the targeted trimmed specimen. Determine the density of the final trimmed specimen in accordance with AASHTO T 166. Core Specimens — Specimen diameter must be 6 inches +/- 0.1 inch (150 mm +/- 2 mm). Determine the density of the final trimmed specimen in accordance with AASHTO T166. 2. Trimming of Cylindrical Specimen. Before starting, refer to the sawing device manufacturer's instructions for cutting specimens. Place the cutting template on the top surface of the laboratory molded specimen or roadway core. Trace the location of the first two cuts by drawing lines using paint or a permanent maker along the sides of the cutting template. Trim the specimen ends by cutting the specimen perpendicular to the top surface following the traced lines. Discard specimen ends. Trim off the top and bottom of the specimen to produce a sample with a height of (1.5 inches +/- 0.02 inches (38 mm +/- 0.5 mm). Measure the density of the trimmed specimen in accordance with AASHTO T 166. If the specimen does not meet the density requirement as specified for performance testing for the mix being tested, then discard it and prepare a new specimen. Air dry the trimmed specimen to constant mass, where constant mass is defined as the weight of the trimmed specimen not changing by more than 0.05% in a 2 hour interval. 3. Mounting Trimmed Specimen to Base Plates (Platens). a. Mount and secure the base plates (platens) to the mounting jig. Cut'a piece of adhesive tape approximately 4.0 inches (102 mm) in length. Center and place the piece of tape over the gap between the base plates. Prepare the epoxy following manufacturer's instructions. Cover a majority of the base plates (platens) with epoxy, including the tape. Glue the trimmed specimen to the base plates. Place a 10 lb (4.5 kg)

re the epoxy following manufacturer's instructions. Cover a majority of the base plates (platens) with epoxy, including the tape. Glue the trimmed specimen to the base plates. Place a 10 lb (4.5 kg) weight on top of the glued specimen to ensure full contact of the trimmed specimen to the base plates. Allow the epoxy to cure for the time recommended by the manufacturer. Remove the weight from the specimen after the epoxy has cured. Turn over the glued specimen so the bottom of the base plates faces upward. Using a hacksaw, cut a notch through the epoxy which can be seen through the gap in the base plates. The notch should be cut as evenly as possible and should just begin to reach the specimen underneath the epoxy. Great care should be taken not to cut more than 1/16 inch (1.58 mm) into the specimen. Place the test sample assembly in the Overlay Tester's environmental chamber for a minimum of 1 hour before testing. 4. Start Testing Device. Please refer to manufacturer's equipment manual prior to operating equipment. 61