Critical review of ADOT's hot mix asphalt specifications : final report 630.
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Critical review of ADOT's hot mix asphalt specifications : final report 630.

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  • English

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      Final report 630
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    • Abstract:
      The Arizona Department of Transportation (ADOT) has developed specifications and procedures to

      ensure the quality of the hot mix asphalt materials purchased by the Department. The document

      recording these specifications and procedures is the Standard Specifications for Road and Bridge

      Construction. The 2008 Standard Specifications is the reference used throughout this document.

      Specifications, however, are constantly changing as technology advances, materials change, and mix

      design criteria change. The objectives of this project are to: review the state-of-the-industry in Arizona

      with a focus on equipment and technologies currently being used; review ADOT’s construction

      operations conformance history reports to identify probable causes of non-conformance; perform a

      critical review of the asphaltic concrete sections of the current standard specifications; recommend

      asphaltic concrete specification changes; and prepare a report of the activities.

      These objectives were met by holding a series of workshops in Arizona with both ADOT and

      contractor personnel participating. The workshops gave participants an opportunity to discuss issues and

      concerns with details of the existing specifications. Based on this input, a critical review of the existing

      specifications was prepared and recommendations for revising the specifications to national state-of-thepractice

      were made. In addition, recommendations were made for revisions to ADOT’s construction

      operations conformance history reporting system.

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