Laboratory evaluation of field produced hot mix asphalt containing post-consumer recycled asphalt shingles and fractionated recycled asphalt pavement Andrew A. Cascione, R. Christopher Williams, William G. Buttlar, Sarfraz Ahmed, Brian Hill, Debra S. Haugen, Steven Gillen
Warm Mix Usage Skyrockets. Asphalt pavement is not only America's most recycled and reused material, it now is being recycled and reused at a rate over 99 percent. Use of environmentally friendly warm-mix asphalt grew by more than 148 percent from 2009 to 2010, a trend that is expected to continue. Recycling of asphalt pavements and asphalt ...
Recycled Mixtures. Substitution of reclaimed asphalt pavement (RAP) and/or recycled asphalt shingles (RAS) for part of the new materials required to produce the HMA is acceptable as described in the following subsections. Produce the mixture according to subsection 501.02.C. Inclusion of RAP and/or RAS in the mixture will not change the
Sep 28, 2010· Dem-Con Recovery & Recycling, a subsidiary of Dem-Con Companies, Shakopee, MN, recently invested in a Rotochopper RG1 grinder to grind tear off asphalt shingles for use in hot-mix asphalt (HMA) plants. The plants produce asphalt that paving contractors use in building bituminous pavement roads, parking lots and driveways.
In January 1997, CalRecycle submitted a proposal to Caltrans Pavement Design and Rehabilitation Committee (PDRC). The proposal suggested that Caltrans (1) write an SSP allowing 5 percent ground factory scrap asphalt shingles in hot mix asphalt pavement, …
c. Reclaimed Asphalt Pavement, Recycled Asphalt Shingles, and Binder Grade Selection. The method for determining the binder grade in HMA mixtures incorporating RAP and/or RAS is divided into three categories designated Tier 1, Tier 2 and Tier 3. Each tier has a range of percentages that represent the contribution of the RAP and/or RAS binder toward
Information Series 123 Recycling Hot Mix Asphalt Pavements NAPA's guide to processing RAP at the hot-mix asphalt plant has been updated, enhanced, and significantly expanded in 2007 and this revised publication explains how to reclaim, size, store, and determine the value of using RAP.
Post Consumer Recycled Asphalt Shingles (PRAS) Since 2011, North Carolina paving companies have been able to use clean post-consumer recycled asphalt shingles (PRAS) as feedstock material in hot mix asphalt on North Carolina Department of Transportation (DOT) road projects. Asphalt shingles are considered clean if metal, wood, insulation, flashing and other trash are removed.
In February 2009, the Texas Commission on Environmental Quality (TCEQ) issued a memo to allow hot mix plants to include either post-industrial or tear-off recycled asphalt shingles under the TCEQ Air Quality Standard Permit for Permanent Hot Mix Asphalt Plants.
Recycled asphalt shingles (RAS), Shingles, Recycled asphalt pavement (RAP), Recycled materials, Hot mix paving mixtures, Mixture design, Laboratory tests, Asphalt binder extraction and gradation, Dynamic modulus of elasticity, Field performance, Pavement performance, binder criterion, Binders, Asphalt, Pavement No restrictions.
possible, the use of recycled asphalt shingles (RAS) in hot mix asphalt looks appealing. However, the handling and performance of these mixtures is still highly questioned and viewed as potentially problematic by most agencies. A laboratory study was conducted to evaluate the impact on recycled asphalt shingles (RAS) on the
Mar 11, 2019· At present, asphalt shingle recyclers can generate revenue in the form of tippage fees to accept old shingles (typically lower than at landfills), as well as through marketing activities to sell processed material. Markets for recycled asphalt shingles include existing early stage markets such as hot-mix asphalt and cold patch, as well as other emerging and potential markets.
During in-place hot mix asphalt recycling, repaving is performed as either a single or multiple pass operation. This process relies on equipment specialized in heating, scarifying, rejuvenating, laydown and compaction. Cold Mix Asphalt. Recycled cold mix produced at a central RAP processing facility requires similar materials as hot mix asphalt.
Recycled Asphalt Shingles in Hot Mix Asphalt Jim McGraw1, Adam Zofka2, Dan Krivit3, Joe Schroer4, Roger Olson1, and Mihai Marasteanu2 Abstract Using recycled asphalt shingles in hot mix asphalt (HMA) has been a developing technology for more than two decades with growing acceptance by both construction contractors and government agencies.
You can now recycle asphalt shingles at the Marathon County landfill. WHY RECYCLE SHINGLES? Research has found that adding 5% ground asphalt shingles to the hot-mix for paving and repairing roads improves its performance and makes it hold up better than a hot-mix without the ground up shingles.
It does not cover the use of recycled asphalt shingles in hot-in-place pavements, cold in-place pavements or cold recycled pavements. (5) A Standard Recommended Practice for Design Considerations when using Reclaimed Asphalt Shingles in Hot Mix Asphalt has also been submitted for publication. This document includes the following sections to aid ...
Apr 26, 2012· Evaluation of Recycled Asphalt Shingles in Hot Mix Asphalt ... The objective of this study was to evaluate the performance of asphalt mixtures containing different dosages of recycled asphalt shingles (RAS) using the dynamic modulus (|E*|) test with a universal testing machine and rutting test with the asphalt pavement analyzer (APA). ...
Apr 17, 2019· Recycled Asphalt Shingles. Using recycled asphalt shingles has several benefits in the production of Hot-Mix Asphalt (HMA). By reusing asphalt from shingles, asphalt manufacturers can reduce costs and improve the quality of asphalt pavement. Using recycled shingles provides a source of aggregate, which reduces the need for mined aggregate.
Recycling Hot-Mix Asphalt and Recycling Manufacturer Waste Asphalt Roofing Shingles General Guidelines Producing quality hot-recycled asphalt pavement or producing quality asphalt pavement containing recycled manufacturer waste asphalt roofing shingles is most successful when "best practices" are followed. Today, through many years of ...
An asphalt shingle contains the same basic ingredients as hot-mix asphalt: aggregate, asphalt cement, and mineral filler. Laboratory and field testing by researchers at the University of Minnesota and the Minnesota Department of Transportation (Mn/DOT) shows that scrap from asphalt shingle manufacturers (pre-consumer) can be used successfully in hot-mix asphalt.
Asphalt hardness. Another issue that the hot mix producer must address is the hardness of the asphalt cement in the shingles. The asphalt cement in the shingles is usually air-blown and is substantially harder than the normal asphalt binder used in a standard HMA mix.
We invest heavily in recycled materials, such as Reclaimed Asphalt Pavement (RAP), Recycled Asphalt Shingles (RAS) and Warm-Mix Asphalt (WMA) technologies. These consume less burner fuel and release fewer emissions. Continuous Improvement and Sustainability
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