archive-com.com » COM » A » ASPHALTWA.COM

Total: 206

Choose link from "Titles, links and description words view":

Or switch to "Titles and links view".
  • Washington Asphalt Pavement Association |
    way with Read More Pavement Facts Posted by admin on Sep 18 2010 There are over 4 05 million public centerline road miles 8 52 million lane miles in the U S and of this 2 50 million miles or 63 percent are paved FHWA 2009 About 70 percent of Washington State roads are paved Pavement Purpose Typically pavements are built for three main Read More Member Benefits Posted by admin on Sep 13 2010 As a member of the Washington 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 Read More Previous Next Economics Life Cycle Cost Posted by admin on Sep 15 2010 Today s current national and local economic conditions combining reduced funding with high infrastructure needs have elevated the importance of prudent spending Read More Environment Sustainable Pavement Posted by admin on Sep 13 2010 Asphalt is the sustainable material for constructing pavements From the production of the paving material to the placement of the pavement on the road to rehabilitation through Read More Engineering Perpetual Pavement

    Original URL path: http://www.asphaltwa.com/page/3/ (2016-04-26)
    Open archived version from archive


  • Washington Asphalt Pavement Association › Log In
    Washington Asphalt Pavement Association Username Password Remember Me Lost your password Back to Washington Asphalt Pavement Association

    Original URL path: http://www.asphaltwa.com/wp-login.php?redirect_to=http%3A%2F%2Fwww.asphaltwa.com%2Fwp-admin%2F&reauth=1 (2016-04-26)
    Open archived version from archive

  • Resources | Washington Asphalt Pavement Association
    Generally gravel borrow refers to high quality granular fill This granular fill may contain a substantial amount of soil but it is generally devoid of most clays silts and other deleterious material HIPR Hot In Place Recycling A pavement recycling method that heats and rejuvenates an existing pavement surface typically using propane radiant heaters and a rejuvenating agent in place then mixes and levels the recycled mix using a standard auger system HMA Hot Mix Asphalt A high quality thoroughly controlled hot mixture of asphalt binder and aggregate that can be compacted into a uniform dense mass HMAC Hot Mix Asphalt Concrete Another term for HMA Ice lens Subterranean ice crystals that form along the plane of freezing temperature Water migrates up from below where the temperature is above freezing then freezes once it reaches the freezing depth in a soil forming an ice lens Independent assurance A management tool that requires a third party not directly responsible for process control or acceptance to provide an independent assessment of the product and or the reliability of test results obtained from process control and acceptance testing The results of independent assurance tests are not to be used as a basis of product acceptance In situ In place in it s original location Isotropic Refers to properties that are the same regardless of the direction that is measured Properties that are the same everywhere JMF Job mix formula A recommended specified mixture of aggregate and asphalt binder Laydown The portion of the HMA paving process where the HMA is actually placed or laid down by the paving machine LEF Load Equivalency Factor The output from the ESAL equation This factor relates various axle load combinations to the standard 18 000 lb single axle load Leveling course A first lift applied to an existing pavement used to fill in ruts and make up elevation differences Lift A layer or course of paving material Linear Elastic A material property meaning that an object or material will return to or is capable of returning to an initial form or state after deformation in a linear manner e g a plot of a linear elastic material would show a straight line Almost no material is completely linearly elastic but many materials are linearly elastic over a certain range of stress strain Liquid limit The water content above which a soil behaves as a viscous liquid i e its shearing strength is negligible Macadam Type of early bituminous pavement named after its inventor a Scotsman named John McAdam 1756 1836 McAdam sometimes spelled Macadam pavements used smaller angular aggregate over larger angular aggregate over a well compacted sloped subgrade windows antivirus software Maltenes non polar or relatively low polarity molecules within asphalt cement Mat A term used to describe the fresh asphalt surface behind the paving machine Most commonly used to refer to the asphalt during the laydown and compaction phase of construction Mat tearing A term used to describe the pulling of the HMA under the screed of the paver Generally results in coarse textured streaks behind the paver Microsurfacing An advanced form of slurry seal that uses the same basic ingredients emulsified asphalt water fine aggregate and mineral filler and combines them with advanced polymer additives to produce a more capable end product Mineral filler Defined by the Asphalt Institute as a finely divided mineral product at least 65 percent of which will pass through a No 200 sieve Pulverized limestone is the most commonly manufactured mineral filler although other stone dust silica hydrated lime portland cement and certain natural deposits of finely divided mineral matter are also used Asphalt Institute 1962 MTV Material Transfer Vehicle Used to assist the paver in accepting HMA Most pavers are equipped to receive HMA directly however in certain situations it can be necessary or advantageous to use an MTV Paving using bottom dump trucks and windrows requires a windrow elevator MTV while other MTVs are used to provide additional surge volume which is advantageous because it allows the paver to operate continuously without stopping minimizes truck waiting time at the paving site and may minimize segregation and temperature differentials NAPA National Asphalt Pavement Association NAPA supports an active research program designed to improve the quality of HMA pavements and paving techniques used in the construction of roads streets highways parking lots airports and environmental and recreational facilities The Association provides technical educational and marketing materials and information to its Members as well as product information to users and specifiers of paving materials The Association whose members number more than 1 100 companies was founded in 1955 http www hotmix org NCAT National Center for Asphalt Technology NCAT was established at Auburn University in 1986 with an endowment set up by the NAPA Research and Education Foundation Its mission is to improve HMA performance through research education and information services http www eng auburn edu center ncat NFS Not frost susceptible Optimum moisture content In a soil the moisture content at which maximum density can be achieved PCC Portland cement concrete Permeability A property describing the degree to which a material can be permeated or penetrated especially by liquids or gases Perpetual pavement Long lasting HMA pavement Plasticity index PI the numerical difference between the Liquid Limit and the Plastic Limit of a soil Plastic limit The water content below which a soil ceases to behave as a plastic medium and beings to exhibit the properties of a semisolid Polar molecule A molecule having a pair of electric charges or magnetic poles of opposite sign or polarity separated by a small distance This is usually determined by the arrangement of atoms and relative electron location probabilities of the bonded molecule Pothole Bowl shaped openings in a pavement resulting from localized disintegration Prime coat An application of asphalt primer to an absorbent surface Often used to prepare an untreated base for an asphalt surface The prime penetrates or is mixed into the surface of the base and plugs the voids

    Original URL path: http://www.asphaltwa.com/category/5/ (2016-04-26)
    Open archived version from archive

  • Patching | Washington Asphalt Pavement Association
    Calendar Industry Events WAPA Events Home Evaluation Patching Patching An area of pavement that has been replaced with new material to repair the existing pavement A patch is considered a defect no matter how well it performs Two patches on an urban arterial placed after utility cuts A patch on an urban arterial used to repair a spalled joint reflective crack Problem Roughness Possible Causes Previous localized pavement deterioration that

    Original URL path: http://www.asphaltwa.com/2010/09/18/patching/ (2016-04-26)
    Open archived version from archive

  • Raveling | Washington Asphalt Pavement Association
    Streets Rural Roads Arterials Highways Parking Lots Residential Driveways Pathways Recreational Facilities Heavy Industrial Facilities Airfields Site Paving Awards Winners How To Apply Calendar Industry Events WAPA Events Home Evaluation Raveling Raveling The progressive disintegration of an HMA layer from the surface downward as a result of the dislodgement of aggregate particles Raveling possibly resulting from segregation temperature differentials or inadequate compaction Raveling that is likely the result of segregation and or construction related temperature differentials Problem Loose debris on the pavement roughness water collecting in the raveled locations resulting in vehicle hydroplaning loss of skid resistance Possible Causes Loss of bond between aggregate particles and the asphalt binder as a result of A dust coating on the aggregate particles that forces the asphalt binder to bond with the dust rather than the aggregate Aggregate segregation If fine particles are missing from the aggregate matrix then the asphalt binder is only able to bind the remaining coarse particles at their relatively few contact points Inadequate compaction during construction High density is required to develop sufficient cohesion within the HMA Mechanical dislodging by certain types of traffic studded tires snowplow blades or tracked vehicles Repair A raveled pavement should be investigated

    Original URL path: http://www.asphaltwa.com/2010/09/18/raveling/ (2016-04-26)
    Open archived version from archive

  • Contact Us | Washington Asphalt Pavement Association
    Evaluation Surface Distressess Maintenance and Rehab Design Catalog Residential Streets Collector Streets Rural Roads Arterials Highways Parking Lots Residential Driveways Pathways Recreational Facilities Heavy Industrial Facilities Airfields Site Paving Awards Winners How To Apply Calendar Industry Events WAPA Events Home Contact Us Contact Us Washington Asphalt Pavement Association Work Phone 425 207 8814 work Work Fax 425 970 3178 work fax Work Email Info AsphaltWa com INTERNET Washington Asphalt Pavement

    Original URL path: http://www.asphaltwa.com/contact-us/#wpcf7-f3651-p299-o1# (2016-04-26)
    Open archived version from archive

  • Contact Us | Washington Asphalt Pavement Association
    Evaluation Surface Distressess Maintenance and Rehab Design Catalog Residential Streets Collector Streets Rural Roads Arterials Highways Parking Lots Residential Driveways Pathways Recreational Facilities Heavy Industrial Facilities Airfields Site Paving Awards Winners How To Apply Calendar Industry Events WAPA Events Home Contact Us Contact Us Washington Asphalt Pavement Association Work Phone 425 207 8814 work Work Fax 425 970 3178 work fax Work Email Info AsphaltWa com INTERNET Washington Asphalt Pavement

    Original URL path: http://www.asphaltwa.com/contact-us/## (2016-04-26)
    Open archived version from archive

  • Pavement Guide | Washington Asphalt Pavement Association
    cracks generally having two ends pointed into the direction of traffic Read More Rutting Surface depression in the wheelpath Pavement uplift shearing may occur along the sides of the rut Ruts are particularly evident after a rain when they are filled with water There are two basic types of rutting mix rutting and subgrade rutting Mix rutting occurs when the subgrade does not rut yet the pavement surface exhibits wheelpath depressions as a result of compaction mix design problems Subgrade rutting occurs when the subgrade exhibits wheelpath depressions due to loading In this case the pavement settles into the subgrade ruts causing surface depressions in the wheelpath Read More Raveling The progressive disintegration of an HMA layer from the surface downward as a result of the dislodgement of aggregate particles Read More Potholes Small bowl shaped depressions in the pavement surface that penetrate all the way through the HMA layer down to the base course They generally have sharp edges and vertical sides near the top of the hole Potholes are most likely to occur on roads with thin HMA surfaces 1 to 2 inches and seldom occur on roads with 4 inch or deeper HMA surfaces Roberts et al

    Original URL path: http://www.asphaltwa.com/category/6/page/3/ (2016-04-26)
    Open archived version from archive



  •