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Pages 4-5

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From page 4...
... 5 • Guidance for asphalt mix design practices and procedures that include different or a higher percentage of recycled materials. • Understanding how the age and type of asphalt plant equipment impacts the addition of recycled materials during production.
From page 5...
... 6 Information related to these topics was collected through a literature review and two agency surveys. The state materials engineers were surveyed to collect information about determining recycled material properties, procedures, and practices for preparing mix design samples, volumetric and performance testing, and their perceptions of the impact of different types and percentages of recycled materials on performance.

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