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Review the QCP and verify that it includes the required elements and sufficiently describes the contractor’s proposed quality control processes. For temperature range requirements, refer to Section 39-2.01C(1) “General,” and 39-2.02C, “Construction,” of the. Verify that the contractor submits a job mix formula and a QCP for HMA production and placement for all types of HMA. When a WMA technology is used, Section 39-2.01A(1), “Summary,” of the Standard Specifications requires that contractors choose a technology that is on an Authorized Material List for WMA authorized technologies. Certification Program for Suppliers of Asphalt, METS: Material Plant Quality Program, Division of Construction. The air and surface temperature of the building have been measured and a set of meteorological parameters have been collected. If HMA loads are rejected before placement, note on the back of the weighmaster certificate and Form CEM-4601, “Assistant Resident Engineer’s Daily Report,” why the HMA was rejected, such as cold mix, segregated mix, or contaminated mix. Before the work begins, the resident engineer will: Review the documents in the contractor’s job mix formula submittal information to verify they are complete. For samples that will be shipped to the district material laboratory or field construction laboratory for testing, completes Form TL-0101, “Sample Identification Card.” Follows the instructions printed in the book that contains the form and the information in Section 6-103, “Field Sampled Material Identification for Testing,” of this manual. Can stain due to mold, mildew, leaves and drainage from vehicles. Asphalt concrete, commonly called asphalt, tarmac, pavement or black top, is a composite material used in the construction of roadways and parking lots.This composite is a mixture of a petroleum byproduct, asphaltic bitumen and aggregate materials. Ship to METS as detailed in Section 6-2, “Acceptance of Manufactured or Fabricated Materials and Products,” of this manual. Quality assurance must be performed regularly and the material acceptance test processed in a timely fashion. Make sure the proper chain of custody is maintained throughout the process, including delivery to and receipt from a commercial shipping service. Review the project specifications’ measurement and payment clauses and determine what records must be kept. Ship the samples to the district materials laboratory or field construction laboratory for testing. The type of underlying soil and type of vehicles that will use it dictate the thickness. However, the resident engineer is responsible for enforcing contract specifications at the plant. Privacy Policy. Direct the testing labs to test all samples between the first and second out-of-specification acceptance tests and any remaining samples immediately before or after any failure. If the total layer thickness is less than 0.15 foot, the contractor must follow the requirements of the method process listed in Section 39-2.01C(15)(b), “Method Compaction,” and the “Construction” sections of the applicable type of HMA: 39-2.02C for Type A, 39-2.03C for RHMA-G, or 39-2.04C for OGFC, of the Standard Specifications. ( �� It is good practice to test aggregate samples for moisture content in accordance with AASHTO T 255, “Standard Method of Test for Total Evaporable Moisture Content of Aggregate by Drying,” or AASHTO T 329, “Standard Method of Test for Moisture Content of Asphalt Mixtures by Oven Method,” because moisture influences proportioning. The word is derived from the Ancient Greek ἄσφαλτος ásphaltos. 1 0 obj Coarse, fine, and supplemental aggregate from stockpiles, cold feed belts, or hot bins. Hot mix asphalt is composed of aggregate bound together into a solid mass by asphalt cement. During HMA placement, the paving inspector generally takes the following steps: Below is an example spread-rate calculation assuming 12 feet wide, 0.15-foot thickness, mix 150 pounds per cubic foot, and 16 tons shown on a weighmaster certificate. The job mix formula must be verified if Form CEM-3513 was not issued within 12 months of proposed HMA production. Regular pressure washing improves the appearance. Transport the cores to the district materials laboratory or construction field laboratory where they will be tested for in-place density (California Test 375), except the density of each core will be determined using AASHTO T 275, Method A, and the theoretical maximum density of the mix will be determined using AASHTO T 209, Method A. For each day of aggregate lime treatment, obtain the treatment data log in electronic format for the resident engineer’s project files. The treatment method can be either lime treatment (by dry lime, dry lime with marination, or lime slurry with marination) or liquid antistrip.

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