TY - GEN
T1 - Full-scale evaluation of balanced cold in-place recycling (CIR) asphalt mixtures using a heavy vehicle simulator
AU - Saidi, Ahmed
AU - Ali, Ayman
AU - Mehta, Yusuf
AU - Cox, Ben C.
AU - Lein, Wade
N1 - Publisher Copyright:
© Springer Nature Switzerland AG 2020.
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
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U2 - 10.1007/978-3-030-55236-7_35
DO - 10.1007/978-3-030-55236-7_35
M3 - Conference contribution
AN - SCOPUS:85090095744
SN - 9783030552350
T3 - Lecture Notes in Civil Engineering
SP - 339
EP - 347
BT - Accelerated Pavement Testing to Transport Infrastructure Innovation - Proceedings of 6th APT Conference
A2 - Chabot, Armelle
A2 - Hornych, Pierre
A2 - Harvey, John
A2 - Loria-Salazar, Luis Guillermo
PB - Springer
T2 - 6th International Conference on Accelerated Pavement Testing, APT 2021
Y2 - 27 September 2021 through 29 September 2021
ER -