Asphalt Plants – Know the facts

Posted by on Sep 22, 2017 in News |

Thousands of communities across the country coexist peacefully with asphalt pavement mix plants. These facilities are in urban, suburban, and rural areas, and most of them are known as good neighbors who are engaged with their community and dedicated to sustainable operations. However, there is a lot of misleading and often daunting information about asphalt plants and products. Therefore, it’s important to understand what is fact and what is fiction. The asphalt pavement industry has a long record of working with the environmental regulatory agencies including the U.S. Environmental Protection Agency (EPA) and the Minnesota Pollution Control Agency (MPCA) to accurately determine the amount of emissions from an average asphalt plant. The studies show that asphalt plant emissions are typically very low and controlled. Some of the emissions from asphalt pavement plants (as well as other combustion sources) are regulated as air pollutants. The relevant question when considering the potential air quality and human health impacts of emissions from an asphalt plant (or any other source of air emissions) is whether the emissions are great enough to affect local air quality and health, or whether these emissions are instead low enough to be harmless. The U.S. Environmental Protection Agency (EPA) has collected extensive test data from asphalt pavement plants.1 On the basis of this testing, the EPA has determined that even very large facilities – which produce 1,000,000 tons per year of asphalt pavement – are not major sources of air pollution,2 and easily satisfy federal and state regulatory requirements designed to protect public health. In 2002, the EPA officially delisted asphalt plants as a major source of air pollution. Therefore, it has been determined that asphalt plant emissions are very low and getting lower due to innovative control systems and manufacturing technology. A typical facility produces about 200,000 tons per year of asphalt pavement and plants are equipped with air pollution controls that curb dust and vapor emissions. As comparative context, the amount of volatile organic compounds (VOCs) released from the stack of an asphalt pavement plant in a year equate to the same yearly emissions from 20 residential fireplaces or 5 gasoline filling stations. Asphalt plants are an essential component of our transportation infrastructure. Today, more than 94% of the nation’s 2 million miles of paved streets and highways are surfaced with asphalt.3 That’s because state and federal highway departments have long known that asphalt pavements are smooth, cost-effective to construct and maintain, exceptionally durable, environmentally friendly, and 100% recyclable. In addition to paving Minnesota’s interstate and local roadways, asphalt pavements can provide solutions for multiple facilities including bus rapid transit lanes, airport runways, parking lots, walking/biking trails, cycle tracks, tennis courts, and more. Asphalt plants are good neighbors, who are active in their community. They offer opportunities for local employment, and often contribute to community events with volunteers and financial donations. Many asphalt plants are family-owned and -operated and have been an important part of their community for decades. To learn more about the asphalt industry and asphalt plants, visit, and   References: See and  associated  links, especially the Emission Assessment Report at See Federal Register: February 12, 2002, Volume 67, No. 29, pp. 6521-6536, available at filed.pdf. Note that asphalt pavement plants there are called “asphalt concrete manufacturing plants.”...

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MnDOT Receives Record Awards

Posted by on Apr 11, 2017 in News |

The Minnesota Department of Transportation (MnDOT) has the record of 15 National Perpetual Pavement Awards over the past 15 years for the following roadways: Interstate 35 near Willow River in 2002, USTH 71 south of Park Rapids in 2003, USTH 10 in Anoka in 2004, TH 18 between Garrison and Brainerd in 2005, USTH 61 between Wabasha and Kellogg in 2006, USTH 71 near New London in 2007, TH 36 south of Stillwater in 2008, USTH 10 east of Detroit Lakes to Perham in 2009, USTH 61 near Silver Bay in 2010, USTH 71 between Sauk Centre and Long Prairie in 2011, USTH 61 between Kellogg and Minnesota City in 2012, and TH 95 south of Stillwater to Bayport in 2013, TH 47 in Fridley in 2014, and TH 71 north of Bemidji in 2015. TH 371 north of Pine River The criteria for this prestigious national award are pavement sections that are 35 years or older, have not had major structural failure, have on average at least 13 years between overlays, and should demonstrate excellence in design, quality in construction and value to the traveling public (see The figure below shows the number of Perpetual Pavement Awards per states or province. The concept of Perpetual Pavement was introduced in 2001 by the Asphalt Pavement Alliance (APA) [visit the APA’s updated web site at]. From 2001 to today, the APA has presented 100 Perpetual Pavement awards. The awards recognize that many well-built asphalt pavements have been in service for decades with only minor periodic surface rehabilitation. There are several advantages to building long-life pavements including low life-cycle cost, low user-delay impacts, and low environmental impacts by reducing the amount of materials needed over the life of the pavements. The submitted project is Minnesota Trunk Highway 371 in Cass County from 0.573 miles north of TH 84 in Pine River, MN to 0.7 miles south of TH 87. This highway is an example of design and endorsement of long-life, perpetual asphalt pavement in Minnesota. The initial staged construction of TH 371 started in 1971 with 3” of asphalt pavement placed. 2” was added for the final lift in 1977. This 7.7 mile long segment of TH 371 is a major route for daily commuting and truck traffic. Thanks to the progressive vision and partnering efforts of agency and industry representatives, this project (TH 371) is proudly being submitted by Minnesota as a Perpetual Pavement Award Nomination. The project has demonstrated outstanding design, construction, and performance value for 45 years of service to the traveling public of...

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MultiCool App Available Now!

Posted by on Apr 25, 2014 in News |

MultiCool is an asphalt pavement cooling prediction program for use during construction. Funding for this app was provided by the National Asphalt Pavement Association. MultiCool is meant to estimate how rapidly a freshly-placed mat will cool as a function of the initial mat temperature, ambient conditions, mat thickness and other properties. The cooling rate prediction can help contractors better plan their rolling operations to more efficiently achieve target mat density. MultiCool has been validated in cold (Minnesota) and warm (California and Alabama) climates for typical Superpave mixtures, stone matrix asphalt (SMA) mixes, warm mix asphalt (WMA), reclaimed asphalt pavement (RAP), reclaimed asphalt shingle (RAS) and ground tire rubber (GTR) mixtures. It is available in the following formats: Android app: Search for MultiCool in the Google Play store or use this link   In a web browser on a mobile device (use this option for iPhone):   In a web browser on your desktop:...

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Asphalt Pavements and LEED Credits

Posted by on Mar 13, 2014 in News |

Global economic competition, metropolitan congestion, and global climate change are among the new dynamics that require new thinking in the nation’s transportation and development systems of the future. Did you know that the production and placement of asphalt pavements consumes less fuel and produces lower levels of greenhouse gases? Download the Asphalt Pavements and LEED Credits PDF »

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Free Software

Posted by on Feb 11, 2014 in News | Comments Off on Free Software

Software for designing Perpetual Pavements, PerRoad 3.5 and PerRoadXpress 1.0; and Life Cycle Cost Analysis (LCCA), LCCA Original and LCCAExpress, are available for free at

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