Full-scale evaluation of balanced cold in-place recycling (CIR) asphalt mixtures using a heavy vehicle simulator

Ahmed Saidi, Ayman Ali, Yusuf Mehta, Ben C. Cox, Wade Lein

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study was initiated with the goal of evaluating the impact of binder content on the field performance of Cold In-Place Recycling (CIR) asphalt mixtures. Three CIR sections were constructed at the Center for Research and Education in Advanced Transportation Engineering Systems (CREATEs) through reclaiming the existing asphalt pavement structure. All CIR sections were prepared using foamed asphalt (PG 64-22) at 2% (rut resistant), 3% (balanced), and 4% (crack resistant) recycling agent contents. The preparation of the CIR mixes (or sections) also involved adding 3% water by weight of reclaimed asphalt pavement with no virgin aggregates added into the mix. In addition, each of the sections was instrumented with four asphalt strain gauges and two pressure cells; placed at the bottom of the CIR layer. When the CIR layer cured sufficiently (after a week of construction), a thin hot mix asphalt (HMA) overlay (4.75 mm nominal max. aggregate size) was placed on the CIR layer. A Heavy Vehicle Simulator was used to apply accelerated loading on the balanced CIR section for: (1) 150,000 cycles using a truck tire to simulate low to medium traffic level and (2) 50,000 passes using a truck tire to simulate airfield pavements. A laser profiler was used as HVS loading progressed to measure the extent in pavement deformation. Based on the preliminary testing results, the binder content did not present a strong impact on rutting susceptibility of CIR mixtures under both accelerated truck and aircraft loading.

Original languageEnglish (US)
Title of host publicationAccelerated Pavement Testing to Transport Infrastructure Innovation - Proceedings of 6th APT Conference
EditorsArmelle Chabot, Pierre Hornych, John Harvey, Luis Guillermo Loria-Salazar
PublisherSpringer
Pages339-347
Number of pages9
ISBN (Print)9783030552350
DOIs
StatePublished - 2020
Event6th International Conference on Accelerated Pavement Testing, APT 2021 - Nantes, France
Duration: Sep 27 2021Sep 29 2021

Publication series

NameLecture Notes in Civil Engineering
Volume96 LNCE

Conference

Conference6th International Conference on Accelerated Pavement Testing, APT 2021
Country/TerritoryFrance
CityNantes
Period9/27/219/29/21

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

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