2019, Asphalt Pavements, Washington

The Path to a Specification Update: Oscillatory Rollers for HMA Bridge Deck Paving

A Western/Pacific Smooth Ride Sentinel 1st time exclusive! by David Gent, P.E., Executive Director Washington Asphalt Pavement Association (WAPA) The Washington State Department of Transportation (WSDOT) has long used relatively thin (typically less than two-inch depth) hot mix asphalt (HMA) overlays, often in combination with waterproofing membranes, to protect concrete bridge decks from surface wear… Continue reading The Path to a Specification Update: Oscillatory Rollers for HMA Bridge Deck Paving

2019, Asphalt Pavements, Plants, Washington

Asphalt Institute Mix Design Technology Certification Course

April 9-12, 2019 Washington DOT Materials Lab 1655 S. Second Avenue SW Tumwater, Washington The Asphalt Institute Mix Design Technology Certification (MDT) course provides advanced technicians, designers, and engineers responsible for mix designs with a thorough understanding of the properties of the materials which compose asphalt mixtures, as well as the physical and mathematical processes… Continue reading Asphalt Institute Mix Design Technology Certification Course

2018, People, Washington

Lakeside Industries Exemplifies Many Paths to Industry Success

The asphalt paving industry is diverse in many ways, including ownership and business models. Hot-mix asphalt (HMA) producers include international, national, regional and local companies, each successfully filling the need for production and paving within individual economic environments. Even the country’s largest producer accounts for only about 10 percent of the total HMA tonnage produced… Continue reading Lakeside Industries Exemplifies Many Paths to Industry Success

2018, Alaska, American Samoa, Arizona, Asphalt Pavements, California, CNMI, Colorado, Guam, Hawaii, Idaho, Montana, Nevada, New Mexico, Oregon, Pavement Treatments, Utah, Washington, Wyoming

NAPA Issues New Thinlay Guidance

Thinlays are a suite of thin-asphalt overlays designed specifically for pavement preservation. With Thinlays, agencies can extend the life of pavements that are in good to fair condition, decreasing life-cycle costs, improving ride, and decreasing roadway noise. The guide, Thinlays for Pavement Preservation (Information Series 141), provides comprehensive guidance on the proper use of Thinlays,… Continue reading NAPA Issues New Thinlay Guidance

2018, Alaska, Arizona, Asphalt Pavements, California, Emulsions, Hawaii, Nevada, Oregon, Washington

Tack Coat Specifications, Materials, and Construction Practices

Click here to view the PDF of this report. TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 516: Tack Coat Specifications, Materials, and Construction Practices provides state agencies across the United States with guidance as they reevaluate their tack coat specifications, the materials they use, and the practices by which the tack coats are placed.… Continue reading Tack Coat Specifications, Materials, and Construction Practices

2018, Alaska, American Samoa, Arizona, Asphalt Pavements, California, CNMI, Colorado, Guam, Hawaii, Idaho, Montana, Nevada, New Mexico, Oregon, Porous Asphalt, Sustainability, Utah, Washington, Wyoming

Structural Design Guidelines for Porous Asphalt Pavements (July 2018)

Often the design of porous asphalt pavements is focused on how well the pavement will handle water, not traffic. For most parking lots and light-duty surfaces this may be a reasonable approach, but as public agencies look to use full-depth porous asphalt pavements on roadways a traditional structural design methodology is needed. Written by Charles… Continue reading Structural Design Guidelines for Porous Asphalt Pavements (July 2018)

2018, People, Washington

Meet the State Exec: WAPA’s David Gent

The AsphaltPro magazine has their “Meet the State Executive” article series. They hope to feature the executive director from each State Asphalt Pavement Association (SAPA) over a number of their upcoming editions. Editor Sandy Lender goals is to provide the state executive with the opportunity to provide advice or tips based on the experiences from… Continue reading Meet the State Exec: WAPA’s David Gent