Evaluation of Effect of Thermoplastic Polyurethane (TPU) on Crumb Rubber Modified (CRM) Asphalt Binder

Crumb rubber binder with thermoplastic polyurethane (TPU) has been experimented with to characterize the performance properties considering the workability, rutting, fatigue cracking and cracking resistance at low temperatures depending on the temperatures and aging states. Physical and rheological...

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Veröffentlicht in:Materials 2022-05, Vol.15 (11), p.3824
Hauptverfasser: Yun, Jihyeon, Mazumder, Mithil, Na, Il-Ho, Lee, Moon-Sup, Kim, Hyun Hwan
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container_issue 11
container_start_page 3824
container_title Materials
container_volume 15
creator Yun, Jihyeon
Mazumder, Mithil
Na, Il-Ho
Lee, Moon-Sup
Kim, Hyun Hwan
description Crumb rubber binder with thermoplastic polyurethane (TPU) has been experimented with to characterize the performance properties considering the workability, rutting, fatigue cracking and cracking resistance at low temperatures depending on the temperatures and aging states. Physical and rheological properties were evaluated to proceed with the study by applying Superpave asphalt binder testing and multi-stress creep recovery (MSCR). Based on the targeted experiments, the binder samples were produced at three aging states (original, short-term aged and long-term aged) using a rolling thin film oven (RTFO) and pressure aging vessel (PAV). The results revealed that (i) the addition of TPU into CRM binders has a potential effect on increasing viscoelasticity at the original condition, (ii) CRM binders containing TPU showed improved anti-aging performance based on results of RTFO residues and (iii) the inclusion of TPU made it possible for CRM asphalt binder to improve its fatigue and cracking resistance at low temperature.
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subjects Aging
Asphalt pavements
Binders (materials)
Crack propagation
Creep recovery
Fatigue cracking
Fatigue failure
Fracture mechanics
Low temperature
Low temperature resistance
Oxidation
Polyurethane resins
Rheological properties
Rubber
Shear strain
Statistical analysis
Temperature
Test methods
Thin films
Urethane thermoplastic elastomers
Variance analysis
Viscoelasticity
Viscosity
Workability
title Evaluation of Effect of Thermoplastic Polyurethane (TPU) on Crumb Rubber Modified (CRM) Asphalt Binder
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