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  • admin | Washington Asphalt Pavement Association
    Public Works Association and the Washington Association of County Engineers award those paving projects judged to be the most outstanding in the State The awards are presented at WAPA s Annual Meeting in November of each year To apply download the AWARD NOMINATION FORMS paper writing services zp8497586rq Read More Diamond Awards The Diamond Commendations encourage and recognize excellence Continuous improvement in all aspects of operations is the goal Taken together the three commendations below provide a blueprint for excellence in all aspects of the industry s operations both at the plant and on the paving site Read More Pavement Guide Welcome to the Washington Asphalt Pavement Association s Asphalt Pavement Guide This Guide will provide you with a general overview of hot mix asphalt HMA pavement from materials to design to construction to maintenance It is intended to assist those who work in any way with HMA pavement including architects engineers contractors government agencies private consultants students and homeowners Modern on line tools are available for pavement structural design calculations once the general principals HMA design and construction are understood zp8497586rq Read More Asphalt Pavement History Hot mix asphalt HMA pavements have existed in their present form as a

    Original URL path: http://www.asphaltwa.com/author/admin/ (2016-04-26)
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  • Pavement Facts | Washington Asphalt Pavement Association
    called flexible since the total pavement structure bends or flexes to accommodate traffic loads Flexible pavements comprise about 95 percent of U S paved roads This equates to about 63 of all roads paved and unpaved Rigid pavements These are portland cement concrete pavements which may or may not incorporate underlying layers of stabilized or unstabilized granular materials Since PCC is quite stiff rigid pavements do not flex appreciably to accommodate traffic loads Rigid pavements comprise 5 percent of U S paved roads This equates to about 4 of all roads paved and unpaved Hot Mix Asphalt HMA Defined Hot mix asphalt HMA is a bituminous concrete made principally from asphalt binder and aggregate It is distinguished from other bituminous products by its constituent materials asphalt and aggregate mixture design methods and elevated mixing temperature thus the term hot mix Although it is known by many different names such as hot mix asphalt concrete AC or ACP asphalt blacktop or bitumen this Guide makes a conscious effort to consistently refer to this material as HMA Other types of asphalt based pavement surfaces discussed in this Guide such as fog seals slurry seals and BSTs are not HMA but are nonetheless important to the pavement industry computer antivirus software Tar vs Asphalt Tar and asphalt are two different materials Tar often called coal tar is a byproduct of the destructive distillation of coal to form coke Coal is of plant origin and was formed in swamps similar to present day peat bogs and in lagoons probably partly from plants growing in the area and partly from plant material carried in by water and wind Asphalt is a petroleum residue left over from the distillation of crude oil Crude oil is the result of incompletely decayed ancient plant and animal remains The

    Original URL path: http://www.asphaltwa.com/2010/09/18/welcome-facts/ (2016-04-26)
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  • Member Benefits | Washington Asphalt Pavement Association
    Asphalt Pavement Association WAPA you will have access to the latest technologies resources and innovations for the industry In addition to networking sessions where you can interact with your counterparts at local and state agencies WAPA plays an active role in lobbying efforts on the industry s behalf in Olympia Regular members of the WAPA are also granted membership in the National Asphalt Pavement Association NAPA at no additional cost giving them access to national technical and advocacy resources Our Commitment WAPA is committed to do the following for its members Promote better relations between its members and public bodies to promote high professional standards in the asphalt paving industry to combat unfair trade practices to encourage efficiency among contractor associations and to encourage sound business methods tending to raise the standard of asphalt paving contractors generally in the business world Conduct only those activities which are for the common good and benefit alike for all members Conduct its operations to conform to the strictest interpretation of commercial morality and to all of the laws of the state and nation in avoidance of any unfair discriminatory trade practices Cooperate with the Associated General Contractors the Asphalt Institute and like organizations

    Original URL path: http://www.asphaltwa.com/2010/09/13/member-benefits/ (2016-04-26)
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  • Life Cycle Cost | Washington Asphalt Pavement Association
    Facilities Airfields Site Paving Awards Winners How To Apply Calendar Industry Events WAPA Events Home Economics Life Cycle Cost Life Cycle Cost Today s current national and local economic conditions combining reduced funding with high infrastructure needs have elevated the importance of prudent spending Decision makers exercising good stewardship practices can easily justify their decisions and choices to their constituents Good stewardship practices include a detailed logical and documented pavement type selection process that includes a life cycle cost analysis as a key component Life cycle Cost Analysis LCCA The APA has developed life cycle cost analysis software that uses the principles recommended by the Federal Highway Administration FHWA to compare the economics of alternative designs for a given road project It s easy to use unbiased and free There are two versions LCCA Original a comprehensive program and LCCAExpress geared to less complex projects Both are available as free downloads at http asphaltroads org why asphalt economics html Pavement Type Selection Pavement type selection is the process that identifies the best pavement structure for a given application Road agencies such as state DOTs and city county public works departments use PTS processes which may be as simple as specifying

    Original URL path: http://www.asphaltwa.com/2010/09/15/economics-2/ (2016-04-26)
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  • Sustainable Pavement | Washington Asphalt Pavement Association
    building and development practices Sustainable development tries to balance the needs of people nature and the economy Pavement type selection concrete vs asphalt on its own directly contributes to only a few LEED credits Credits can be earned in these ways Porous asphalt systems earn credits for stormwater management The ability to recycle asphalt pavement and the use of asphalt with high percentages of RAP reclaimed asphalt pavement make asphalt eligible for credits under the materials and resources heading Light colored asphalt pavements earn credits for urban heat island mitigation The fact that asphalt pavement material is produced locally can earn credits for materials and resources Warm mix asphalt offers several advantages which support sustainable development When all these factors are considered asphalt pavements can contribute more LEED credits than other pavement types Quiet Pavement There is no better way to reduce road noise than to treat the problem at its source By paving roads and highways with hot mix asphalt the noise inside homes and businesses can be significantly reduced Research in the U S and Europe shows that a Stone Matrix Asphalt SMA or Open Graded FrictionCourse OGFC asphalt pavement mix will reduce highway noise by 3 to 5 dB A To the average person this reduction is the same as doubling the distance between the source of the noise and their location When comparing the noise reduction that is possible by choosing HMA pavement up to 7 dB A we see how much more practical pavement surface selection is than construction of noise barrier walls To learn more about quiet pavement visit http www asphaltroads org why asphalt environment quiet pavement Recycling and Energy About 100 million tons of asphalt pavement is reclaimed each year and over 95 percent of that total is reused or recycled When

    Original URL path: http://www.asphaltwa.com/2010/09/13/environment/ (2016-04-26)
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  • Perpetual Pavement | Washington Asphalt Pavement Association
    over the last decade synthesizes the information in way that is useful to providing guidance for Perpetual Pavement design and construction and provides a vision for further research and development to refine Perpetual Pavements Smoothness Smooth roads conserve energy and extend the life of pavements Studies at a pavement test track in Nevada have shown that driving on smoother surfaces can reduce fuel consumption in the neighborhood of 4 5 to 5 percent compared to fuel consumption on a rough pavement A study in Sweden concluded that vehicles traveling on the smoothest roads in that country s network consumed up to 10 percent less fuel than vehicles on their roughest roads what is antivirus software Smoother pavements also result in longer pavement life by as much as 10 to 25 percent resulting in lower maintenance costs As a rule asphalt pavements are smoother than concrete pavements Smoothness measurements on interstate highways in Oregon and Washington showed that asphalt pavements are on average 33 percent smoother in Oregon and over 50 percent smoother in Washington Smoothness also means that truck tires don t bounce on the pavement and deliver the kind of impact loading they would on a rougher pavement Some

    Original URL path: http://www.asphaltwa.com/2010/09/13/engineering/ (2016-04-26)
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  • Livable Communities | Washington Asphalt Pavement Association
    Winners How To Apply Calendar Industry Events WAPA Events Home Policy Livable Communities Livable Communities There is no doubt that societal trends and economic realities will shape the pavement market going forward Those driving factors include public funding issues an emphasis on sustainable growth and livability unemployment trends and future supply capacity Accounting for all of these factors asphalt is perfectly positioned to address future markets in both highways and other infrastructure Asphalt in Livable Communities Because asphalt is a renewable sustainable material it is environmentally friendly What may surprise some is that asphalt fits very well into livable communities places where people have multiple transportation options Buses run on asphalt pavements Asphalt underlayments help high speed trains stay on track Asphalt can keep bicycles and pedestrians out of the mud Porous asphalt can be used to manage stormwater Jobs in Asphalt best computer security software The asphalt pavement industry is a leader in the construction and maintenance of America s road and highway transportation network While asphalt pavements serve a national market they are built by people who live and work in the areas that they serve Asphalt jobs truly are Main Street jobs that cannot be outsourced overseas

    Original URL path: http://www.asphaltwa.com/2010/09/12/policy/ (2016-04-26)
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  • 2016 / 2017 WAPA Meeting Schedule | Washington Asphalt Pavement Association
    2016 Link to Conference Presentations https www dropbox com sh u901rp6koqt8htv AADgrKgQp3ZdOhKN4Bn8NX7ca dl 0 World of Asphalt March 22 through 24 Nashville TN http www worldofasphalt com WAPA Mid Year Meeting May 18th 20th 2016 The Resort at Coeur d Alene ID Save the Date Hotel Information Mark Your Calendars Mid Year Template NAPA Mid Year Meeting In Seattle July 18 through 20 Seattle WA http www asphaltpavement org Midyear

    Original URL path: http://www.asphaltwa.com/2015/01/14/2016-annual-meeting/ (2016-04-26)
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