Pavement Guide Washington Asphalt Pavement Association
“Aggregate” is a collective term for sand, gravel and crushed stone mineral materials in their natural or processed state (NSSGA 1991). In 2009, the U.S. produced nearly 2 billion “Aggregate” is a collective term for sand, gravel and crushed stone mineral materials in their natural or processed state (NSSGA 1991). In 2009, the U.S. produced nearly 2 billion Materials Washington Asphalt Pavement Association
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Washington Center for Asphalt Technology Washington
Washington Asphalt Paving Association Kiewit Corporation Washington State University WCAT is accredited by the American Association of State Highway and Transportation In this research, the possibility of improving the properties of local asphalt concrete mixes by replacing different portions of the [Show full abstract] PDF Using Reclaimed Asphalt Pavement(PDF) Performance of Asphalt Mixes Containing
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About Us Washington Asphalt Pavement Association
The Washington Asphalt Pavement Association (WAPA) was formed in 1954, originally as the Asphalt Pavement Association of Washington (APAW), by a progressive group of hot Associate Members. Associate members are persons, firms or corporations who place asphalt mixes, but do not produce them, or who supply materials, machinery or services Associate Members Washington Asphalt Pavement Association
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Pavement Facts Washington Asphalt Pavement Association
About 70 percent of Washington State roads are paved. Nearly 94% of the paved roads in the U.S. are paved with asphalt surfacing (Asphalt Institute 2014), which is a testament WASHINGTON. David Gent, Executive Director Washington Asphalt Pavement Association. 451 SW 10th St., Renton, WA 98057 (425) 207-8814 Fax: (425) 970-3198 Massachusetts Aggregate Members SAPA
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Laboratory characterization of reclaimed asphalt pavement
This paper presents the engineering characteristics of reclaimed asphalt pavement (RAP), blended with virgin aggregate for unbound base and subbase layers. The proportions of RAP were 0%, 20%, 60%, 80%, and 100% by total mass of the blend. The experimental laboratory testing included index properties such as gradation, modified Introduction. This design catalog is intended to give general structural design and mix type selection guidance for some typical Washington State HMA pavements. It is organized by general purpose, with each use type being addressed on a different page. These guidelines are intended for use in lieu of other guidance or specification.Introduction Washington Asphalt Pavement Association
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Maximizing the Use of Recycled Asphalt on Road
with new aggregate, sand, and asphalt binder to create Hot Mix Asphalt (HMA) to be used for paving new driving surfaces or mixed with other materials for use as fill material. This is considered cost effective and environmentally responsible. Washington Asphalt Pavement Association, and local agency representatives for assistance. The [11] ASTM 2015 American Society for Testing and Materials Annual Book of ASTM Standards, Road and Paving Materials 04-03. Google Scholar [12] ASHTO Designation 2015 Standard Specification for Transportation Materials and Methods of Sampling and Testing 35 (Washington, D.C., U.S.A: American Association of State Reduced Permanent Deformation of Asphalt Pavement by
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NCHRP Report 441 Transportation Research Board
JAMES A. WILDING, President and CEO, Metropolitan Washington Airports Authority M. GORDON WOLMAN, Professor of Geography and Environmental Engineering, The Johns Hopkins University DAVID N. WORMLEY, Dean of Engineering, Pennsylvania State University MIKE ACOTT, President, National Asphalt Pavement Association (ex officio)Recycled HMA. HMA is one of the most recycled products in the U.S. As much as 100 million tons of HMA are milled off roads during resurfacing and widening projects each year. Of this amount, 80 million tons (80 percent) are recycled as “reclaimed asphalt pavement” (RAP) (Bloomquist et al. 1993). Additionally, in-place recycling techniquesRecycled HMA Washington Asphalt Pavement Association
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David M. Gent, P.E. Executive Director Washington Asphalt Pavement
Paving/ Grading & QC Manager. ICON Materials. Mar 2002 Apr 20119 years 2 months. Management and oversight of all aspects of asphalt paving and related construction activities for CRH's materialsWashington, DC: The National Academies Press. doi: 10.17226/14524. Because of the complexity of incorporating recycled or reclaimed asphalt pavement (RAP) into HMA mix designs, this topic is discussed in a separate chapter in this manual. and estimating specification properties for aggregate mixes from test data on individual aggregateChapter 1 Introduction The National Academies Press
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A review on the mechanisms involved in reclaimed asphalt pavement
Reclaimed Asphalt Pavement (RAP) is a widely used recycled material in pavement construction. Whereas the integration of RAP into asphalt mixtures is a complex subject and need to understand every aspect that entailed in the mix design. The aim of this review paper is to provide comprehensive knowledge about the developments and National Stone, Sand & Gravel Association. American Road and Transportation Builders Association. Historical Construction Equipment Association. Industrial Minerals Association North America. International Society of Explosives Engineers. National Asphalt Pavement Association. National Lime Association. National Mining Association.Associations Pit & Quarry
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Ken Swedeen National Asphalt Pavement Association
In closing, providing immediate relief for state transportation departments and enacting a robust Federal-aid Highway program authorization will jumpstart the economy, provide jobs, and build theRecycled asphalt pavement (RAP) has increasingly been used as a base material for highway construction as a sustainable solution. Due to the existence of asphalt, 100 % RAP typically has low strength and high potential of creep and permanent deformations. RAP can be blended with virgin aggregate, stabilized by cement and fly Recent Development of Recycled Asphalt Pavement (RAP)
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Washington Asphalt Pavement Association
Claim Listing Return to Directory. Our mission is to further the use and quality of hot mix asphalt pavements through communication, research, education, innovative design, specifications and construction and to promote ethical conduct throughout the construction industry. 451 SW 10th Street, Suite 110A. Renton. WA. 98057. 425-207-8814.This research examines how the addition of recycled asphalt pavement (RAP) changes the volumetric and mechanistic properties of asphalt mixtures. The voids in mineral aggregate (VMA) and voids filled with asphalt (VFA) of the RAP mixtures increased at the 25% and 40% levels, and there was also an influence of preheating time Mechanistic and Volumetric Properties of Asphalt Mixtures
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A New Method for the Aggregate Proportion Calculation
Asphalt-treated base (ATB-25) is a widely used flexible base material. The composition and gradation of mineral aggregate are important factors affecting pavement performance of asphalt treated base. In this study, two new methods were proposed to address the problems of existing aggregate proportion calculation for asphalt mixtures: In 2004 and 2005, the National Asphalt Pavement Association and FHWA sponsored a series of . workshops around the country to assess the current state of the practice in hot-mix asphalt (HMA), including Superpave implementation. What was working well with Superpave and what aspects were . perceived by the users as needing refinement were Practical Approaches to Hot-Mix Asphalt Mix Design and
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Pavement Guide Washington Asphalt Pavement Association
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 This guide is published by the Asphalt Pavement Association of Oregon (APAO) for the use and benefit of designers. It covers a number of applications, including streets and driveways, commercial and industrial facilities and specialty applications such as bikeways, cart paths, tennis courts and tracks. Recent additions include chapters on LifeDesign Guides Asphalt Pavement Association of Oregon
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Porous asphalt concrete: A review of design, construction
Porous asphalt concrete (PAC) is an open-graded friction course that is specifically designed to have high air void contents for removing water from the pavement surface. PAC surfaces, which include open-graded friction courses, permeable friction courses, and drainage asphalt pavements, have increasingly gained acceptance among
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