Rock Products

NOV 2014

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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Latest NAPA/FHWA Survey Finds Increasing Adoption of Sustainable Practices For Asphalt Pavements. ROCK products • NOVEMBER 2014 42 ENVIRONMENT A sphalt pavement mixes have grown significantly more sustainable over the past five years thanks to the in‐ creased use of recycled materials and energy‐saving warm‐ mix technologies. According to the latest survey of asphalt mix producers conducted by the National Asphalt Pavement Association (NAPA) in partnership with the Federal Highway Adminis‐ tration (FHWA), 106.4 million tons of warm‐mix asphalt – nearly a third of all asphalt pavement mix production – was used during the 2013 construction season. This marks a greater than 533 percent increase in the use of warm mix since 2009, the first year the survey was conducted. Warm‐mix asphalt is produced with a range of technologies that reduce the production and placement temperature of asphalt pavement mixtures. A variety of environmental, worker safety, and construction benefits have been realized through the adop‐ tion of warm‐mix asphalt. "Innovation is an important principle for the asphalt pave‐ ment industry. The use of warm‐mix technologies, as well as recycled materials, helps us improve both the quality and sustainability of asphalt pavements," said Bill Ensor, NAPA 2014 chairman and president of Maryland Paving Inc. "These latest survey results reveal just how cool and green today's asphalt pavements are, but we continue to seek greater use and adoption of these technologies." The survey also measures the use of reclaimed and recycled ma‐ terials in asphalt pavements, particularly the use of asphalt pavement material reclaimed from old roads and parking lots and recycled asphalt roofing shingles. In 2013, about 72 million tons of reclaimed asphalt pavement (RAP) and 1.7 million tons of reclaimed asphalt shingles (RAS) were used in new asphalt pavement mixes in the United States. Reclaiming and reusing the asphalt cement in RAP and RAS saved about $2 billion in 2013 compared to the use of virgin as‐ phalt binder. The use of RAP also conserved more than 68 mil‐ lion tons of virgin aggregate. Producers were also asked about ground tire rubber, steel and blast furnace slag, and other waste material repur‐ posed into pavements. Although national estimates of usage were not calculated, survey respondents reported using nearly 1.2 million tons of these materials in 2013 in the production of more than 6.6 million tons of asphalt pavement mixes. Asphalt Gets Cooler, Greener By Mark S. Kuhar ARTBA Foundation Seeks Environmental Award Nominees The American Road & Transportation Builders Associa‐ tion Transportation Development Foundation (ARTBA‐ TDF) is now accepting nominations for its 2015 Globe Awards program. The annual competition recognizes surface transporta‐ tion projects and transportation construction firms that utilize exemplary environmental processes to protect or enhance the natural environment. The Globe Awards competition is structured into two categories: project awards and process awards. Project Awards: recognizes private‐sector firms and pub‐ lic‐sector transportation agencies that do an outstand‐ ing job in protecting and/or enhancing the natural environment in the planning, design and construction of U.S. transportation infrastructure projects. Nominations may be made for projects in the following seven cate‐ gories: highways, local or secondary roads, bridges, pub‐ lic transit, airports, railroads, and waterways and ports. Process Awards: honors companies that have exhibited envi‐ ronmentally responsible manufacturing, production, resource extraction or other processes related to surface transporta‐ tion construction. Such organizations may include: • Heavy construction equipment and transportation safety product manufacturers (environmentally re‐ sponsible manufacturing). • Materials companies (environmentally responsible resource extraction and/or production). Nominations must be submitted online at‐ by Jan. 30, 2015.

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