Superpave Construction Guidelines analyzes problems that have been encountered with coarse-graded Superpave mixes, and construction issues that may be different from those encountered when using conventional Hot Mix Asphalt (HMA) mixes.

While the performance of Superpave-designed mixes has been good to date, some problems in production and placement have been experienced. NAPA and the Federal Highway Administration (FHWA) sponsored a colloquium on the subject, and the report is the outcome of that discussion.

The 20-page booklet is $12, plus shipping and handling. It is available to NAPA Members at $6 per copy. Quantity discounts are available.

Also, NAPA released Longitudinal Joints: Problems & Solutions. The publication discusses construction of durable longitudinal joints as a critical element in the longevity of Hot Mix Asphalt (HMA) pavements.

Achieving uniform density both longitudinally and transversely on the pavement will assist in meeting the goal of high-performance HMA pavements. This publication identifies proper techniques that have been successfully used to construct good longitudinal joints. It was developed through a cooperative effort of NAPA and the Construction Industry Manufacturers Association (CIMA).

The list price for the 10-page publication is $8, plus shipping and handling ($4 for NAPA members).

NAPA's toll-free order line is (888) 468-6499. Orders may also be placed via fax to the Publications Department at 301-731-4621, or on-line via the NAPA home page at www.hotmix.org. Credit card payments are accepted. NAPA is located at 5100 Forbes Blvd., Lanham, MD 20706-4413. 

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