Today's sustainability-driven systems require a product or process to be environmentally beneficial as well as cost-effective. This study used life-cycle cost analysis (LCCA) and life-cycle assessment (LCA) to consider the economic and environmental feasibility of using a high content of reclaimed asphalt pavement (RAP) in asphalt mixtures.OSTI.GOV Journal Article: Recycling asphalt proves economical for paving contractors

RECLAIMED ASPHALT PAVEMENT (RAP) AS UNBOUND BASE AGGREGATE LAYER Dec. 06, 2018 Burak Tanyu (Associate Professor at George Mason University) ... • VDOT allows up to 30% RAP content in new HMA mixtures. • However there is still excess RAP within the State. 3 Degraded Asphalt PavementThe use of recycled asphalt pavement (RAP) in asphalt concrete mixes has become a common practice in the construction of new, and reconstruction of old, hot mix asphalt (HMA) pavements. A research project conducted by the Texas Transportation Institute (1) acknowledged wide use of RAP in most of the states but cites important differences in

Reclaimed Asphalt pavement (RAP) is removed using a milling machine which grinds the asphalt into small pieces and it is a useful alternative to materials because it reduces the use of aggregate. Base course is a layer that comes under the surface layer of asphalt pavement and consists of gravel materials with lower specifications than the surface …Investigating Impacts of Warm-Mix Asphalt Technologies and High Reclaimed Asphalt Pavement Binder Content on Rutting and Fatigue Performance of Asphalt Binder through MSCR and LAS Tests J. Cleaner Prod., 219 ( 2019 ), pp. 879 - 893, 10.1016/j.jclepro.2019.02.131

Recycled asphalt, or reclaimed asphalt pavement (RAP), is reprocessed pavement containing asphalt and aggregates. The United States Federal Highway …By: Powered by NAPA. When the Ohio Department of Transportation's (ODOT) Office of Materials Management met with Ryan Smith of Columbus-based RAP Management in 2020, the conversation was all about reclaimed asphalt pavement (RAP). Smith had recently purchased an high recycling technology (HRT) batch plant, and he was interested in …

RECLAIMED ASPHALT PAVEMENT CONTENT PRELIMINARY DRAFT FINAL REPORT Prepared for National Cooperative Highway Research Program Transportation Research Board of The National Academies Randy West National Center …Abstract: Reclaimed asphalt pavement (RAP) is a valuable, high quality material that can be replace over expensive aggregates and binder that can be used for technical, economical and environmental reasons. Use of RAP can be favored all over the world over material on the light of increasing cost of bitumen, the scarcity of high quality aggregates and …

hindered by the presence of recycled crumb rubber. The project aimed to enable an increase of recycled materials in asphalt and an increased opportunities for RAP use. Two trials were undertaken during the project, in partnership with Fulton Hogan and Downer, whereby crumb rubber asphalt was laid and then subsequently reclaimed usingRAP is made up of high-quality, well-graded aggregates coated in asphalt cement when properly crushed and screened. Milling or full-depth removal are the most common methods for removing asphalt pavement. Milling is the process of removing the pavement surface with a milling machine that may remove up to 50 mm (2 in) of material in one pass.

In addition to recycling into asphalt paving or incorporation into bases or subbases, some reclaimed asphalt pavement (RAP) has been used for embankment construction. It can also be used as a fill material. ... Due to its asphalt cement content, the compacted unit weight of RAP (1600 to 2000 kg/m 3 (100 to 125 lbs/ft 3)) ...This paper examines the effects of reclaimed asphalt pavement (RAP) content and binder grade on the fatigue resistance of Georgia asphalt concrete mixtures. The asphalt concrete mixtures were prepared based on two job mix formulas used in northern and southern Georgia and were composed of 12.5-mm nominal maximum aggregate size aggregate and ...

10.5.3 Reclaimed asphalt pavement containing slag aggregate Recent research found that some steel slag aggregates in RAP, with 92% steel slag aggregates, showed considerably high …This paper presents an experimental investigation on the combined use of high content of reclaimed asphalt pavement (RAP) and rejuvenators, for producing asphalt mixtures for wearing courses. First, the new Binder-Fast-Characterization-Test (Bitumen Typisierungs Schnell Verfahren in German) BTSV method, recently proposed in Germany, is used to ...

The binder (asphalt) content of the samples ranged from 4.4 to 6.1%. Based on this characterization, samples from three different plants that represented a low, medium, and high binder content RAP were selected for detailed evaluation. The ages of the collected RAP samples were not known and most likely varied.Asphalt Content and Properties: The asphalt content of most old pavements will comprise approximately 3 to 7 percent by weight and 10 to 20 percent by volume of the pavement. Due to oxidation aging, the asphalt cement has hardened and consequently is more viscous and has lower penetration values than the asphalt cement.

For smaller projects, the asphalt content may be determined in accordance to ASTM D6307 while for larger projects, the asphalt content should be referred to AASHTO …The optimized maximum RAP percentage in a given blend was determined in this study as up to 20% for RAP with low binder content (i.e., ≤ 4.6%) and up 30% for RAP with high binder content (i.e ...

operation), a hot mix asphalt plant, or a concrete, concrete product or a Portland cement product manufacturing facility. Title 14, CCR Section 17381(r) The construction industry generates millions of tons of recycled concrete and asphalt annu-ally. Recycling facilities are regulated by Califor-nia's Department of Resources Recycling andThe primary objective of this research is to examine the effects of reclaimed asphalt pavement (RAP) amounts and fractionation methods on the mix design of high-RAP content surface mixes. To determine the distribution of fine aggregates and binder in RAP stockpile, the sieve-by-sieve analysis of RAP materials was performed.

Reclaimed asphalt pavement constitutes a "treasure trove" of pre-processed road-building materials. The use of recycled asphalt pavement has grown widely, reducing the use of materials and helping to preserve landfill space. ... It is time to consider means for increasing RAP content even further. RAP is a resource rich in asphalt ...Reclaimed asphalt pavement material is asphalt that has been milled or excavated or crushed from existing asphalt pavements or returned from job sites. ... For smaller projects, the asphalt content may be determined in accordance to ASTM D6307 while for larger projects, the asphalt content should be referred to AASHTO T164. In Australia, binder ...