Evaluating the Effects of Recycling Agents on Asphalt Mixtures with High RAS and RAP Binder Ratios (2020) / Chapter Skim
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Pages 187-200
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C-1 A P P E N D I X C Indiana Construction Report La Porte County executed the reconstruction of CO Road W2100 South in the fall of 2015. This field project, located in north-central part of Indiana, consisted of a 2.8 mile-long binder course and asphalt overlay placement.
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C-2 Evaluating the Effects of Recycling Agents on Asphalt Mixtures with High RAS and RAP Binder Ratios Figure C.1: Sections Layout for the Indiana field project. Figure C.2: Binder course and existing pavement surface at the Indiana field project.
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Indiana Construction Report C-3 Figure C.3: Existing pavement surface at the Indiana field project. C.1 MATERIALS AND MIXTURES All three mixes were designed using the 9.5 mm Superpave Mix Cat 2/ Type B surface mix with 75 Superpave gyrations following the Indiana Department of Transportation specifications.
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C-4 Evaluating the Effects of Recycling Agents on Asphalt Mixtures with High RAS and RAP Binder Ratios Figure C.4: One of several aggregate stockpiles. Figure C.5: RAP stockpile.
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Figure C.6: Summary of virgin mix design.
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Figure C.7: Summary of T2 mix design.
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Figure C.8: Summary of control mix design.
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C-8 Evaluating the Effects of Recycling Agents on Asphalt Mixtures with High RAS and RAP Binder Ratios Figure C.9: Overview of asphalt mix plant at La Porte, Indiana. During production, the RAP and RAS materials were added along with the heated aggregate just outside the drying drum, before entering the mixing drum.
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Indiana Construction Report C-9 Figure C.10: Recycling agent injected to the binder line (left) and pump used to regulate the recycling agent dosage (right)
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C-10 Evaluating the Effects of Recycling Agents on Asphalt Mixtures with High RAS and RAP Binder Ratios Figure C.11: Paving of the surface layer at the Indiana field project. Placement of the T2 mix started near the Mailbox 7858 and continued for approximately 1.25 miles.
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Indiana Construction Report C-11 Figure C.12: Paver used for laydown at the Indiana field project.
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C-12 Evaluating the Effects of Recycling Agents on Asphalt Mixtures with High RAS and RAP Binder Ratios Figure C.14: Quality control results for the T2 mix.
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Indiana Construction Report C-13 Figure C.15: Quality control results for the control mix. C.4 SAMPLE COLLECTION Plant mix was collected from the dump trucks at the asphalt mix plant by climbing on scaffolding.
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C-14 Evaluating the Effects of Recycling Agents on Asphalt Mixtures with High RAS and RAP Binder Ratios Table C.4: Materials Sampling Scheme Sample Type Material Point of Sampling Lab-Mixed, Lab-Compacted Fine aggregate Stockpile Coarse aggregate Stockpile elipkcotSPAR elipkcotSSAR Recycling agent Storage tank (plastic tote in metal cage) at plant PG 64-22 binder Storage tank PG 58-28 binder Storage tank Plant-Mixed, Lab-Compacted Loose Mix Dump truck at plant Plant-Mixed, FieldCompacted Field Cores EB Travel Lane (Center)
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