Using Recycled Asphalt Shingles with Warm Mix Asphalt Technologies (2018) / Chapter Skim
Currently Skimming:
Pages 191-200
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 191... ...
191 Best Practices for Processing Recycled Asphalt Shingles Introduction As a result of increasing prices for construction of asphalt pavements, contractors as well as state DOTs continue to look for ways to reduce asphalt production costs. One method to reduce costs that has shown promise and that has been adopted by many state DOTs and contractors is to use reclaimed asphalt shingles (RAS)
|
From page 192... ...
192 Now that RAS is permitted by most state DOTs and used by many contractors in asphalt production, more guidance is needed for its use. This document provides best practices for processing and stockpiling the recycled asphalt shingles.
|
From page 193... ...
193 RAS are used in the same mixture, their proportions should be maintained constant since the asphalt binders in these two products are much different and this can significantly affect the mixture properties. It is not recommended to interchange PC waste with MW during construction of a project.
|
From page 194... ...
194 the paving contractor. The effort to clean the material may cost the paving contractor a little more, but it is typically worth it to have the RAS partially cleaned when it is delivered to the paving contractor.
|
From page 195... ...
195 Stockpiling of Waste Shingles Prior to Processing General Stockpiling RAS should be accomplished in a way that minimizes variability when processed. This requires that RAS from different sources be stockpiled separately and that as many contaminants as possible are removed prior to grinding.
|
From page 196... ...
196 these RAS particles with the other mixture components. However, grinding to a smaller size takes more effort and is costlier.
|
From page 197... ...
197 Testing Testing shingle particles to determine the RAS characteristics is very important. Tests that generally need to be conducted may include particle size distribution, asphalt content, asphalt binder recovery and testing, deleterious material, and asbestos.
|
From page 198... ...
198 there is usually a need for asbestos testing. Keep in mind that local, state, and federal requirements may vary.
|
From page 199... ...
199 National Association of Home Builders. From Roofs to Roads: Recycling Asphalt Roofing Shingles into Paving Materials, 1999.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.