Nonlinear Rheological Characterizations of Reactive Elastomeric Terpolymer-Modified Asphalt Binder Based on Large-Amplitude Oscillatory Shear TestSource: Journal of Materials in Civil Engineering:;2023:;Volume ( 035 ):;issue: 012::page 04023482-1Author:Enhui Yang
,
Yunchuan Du
,
Yingxiang Wang
,
Hai Yuan
,
Jiale Chen
,
Haibo Di
,
Feiyun Yuan
,
Yanjun Qiu
DOI: 10.1061/JMCEE7.MTENG-16597Publisher: ASCE
Abstract: In this paper, we investigated the nonlinear rheological behavior of two types of modified asphalt binders, namely reactive elastomeric terpolymer-modified asphalt binder (REA) and styrene-butadiene-styrene–modified asphalt binder (SBA), under large strains using large-amplitude oscillatory shear (LAOS) testing. To determine the test strain levels, we conducted strain sweeps at different temperatures and shear frequencies before subjecting the asphalt binders to the LAOS test. Our findings show that the nonlinear critical strain of asphalt binders has a temperature and frequency dependence, with smaller values at lower temperatures and higher frequencies, indicating stronger nonlinear rheological properties. We used Fourier-transform rheology to analyze the relative intensity of higher harmonics of asphalt binders (In/I1, 3≤n≤9) and found that the nonlinear parameter I3/I1 increased with shear frequency and strain amplitude, and that the In/I1 of REA was much larger than that of SBA. To evaluate the performance of the modified asphalt binders, we used the zero-strain nonlinear parameter Q0 and found that REA had a higher Q0 value than SBA at the same frequency. Furthermore, based on the Lissajous curves at 25°C and 10 rad/s, we observed that the aberration degree of the curves increased with increasing strain amplitude. The Lissajous curves of both base asphalt binder (BA) and SBA failed to form a closed ellipse due to sample damage at larger strain levels, which means that BA and SBA are less resistant to large deformations, whereas REA maintained a higher load-bearing capacity. We also observed that both modified asphalt binders exhibited continuous shear-thinning properties. At higher strains, the intermolecular forces in SBA were overcome by shear deformation, whereas the chemical bonds formed between oxygen-containing functional groups and carboxylic acid groups in REA were gradually broken by stretching. LAOS test results demonstrated that REA exhibited higher deformation resistance potential at large strain levels compared with SBA.
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contributor author | Enhui Yang | |
contributor author | Yunchuan Du | |
contributor author | Yingxiang Wang | |
contributor author | Hai Yuan | |
contributor author | Jiale Chen | |
contributor author | Haibo Di | |
contributor author | Feiyun Yuan | |
contributor author | Yanjun Qiu | |
date accessioned | 2024-04-27T20:53:03Z | |
date available | 2024-04-27T20:53:03Z | |
date issued | 2023/12/01 | |
identifier other | 10.1061-JMCEE7.MTENG-16597.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4296168 | |
description abstract | In this paper, we investigated the nonlinear rheological behavior of two types of modified asphalt binders, namely reactive elastomeric terpolymer-modified asphalt binder (REA) and styrene-butadiene-styrene–modified asphalt binder (SBA), under large strains using large-amplitude oscillatory shear (LAOS) testing. To determine the test strain levels, we conducted strain sweeps at different temperatures and shear frequencies before subjecting the asphalt binders to the LAOS test. Our findings show that the nonlinear critical strain of asphalt binders has a temperature and frequency dependence, with smaller values at lower temperatures and higher frequencies, indicating stronger nonlinear rheological properties. We used Fourier-transform rheology to analyze the relative intensity of higher harmonics of asphalt binders (In/I1, 3≤n≤9) and found that the nonlinear parameter I3/I1 increased with shear frequency and strain amplitude, and that the In/I1 of REA was much larger than that of SBA. To evaluate the performance of the modified asphalt binders, we used the zero-strain nonlinear parameter Q0 and found that REA had a higher Q0 value than SBA at the same frequency. Furthermore, based on the Lissajous curves at 25°C and 10 rad/s, we observed that the aberration degree of the curves increased with increasing strain amplitude. The Lissajous curves of both base asphalt binder (BA) and SBA failed to form a closed ellipse due to sample damage at larger strain levels, which means that BA and SBA are less resistant to large deformations, whereas REA maintained a higher load-bearing capacity. We also observed that both modified asphalt binders exhibited continuous shear-thinning properties. At higher strains, the intermolecular forces in SBA were overcome by shear deformation, whereas the chemical bonds formed between oxygen-containing functional groups and carboxylic acid groups in REA were gradually broken by stretching. LAOS test results demonstrated that REA exhibited higher deformation resistance potential at large strain levels compared with SBA. | |
publisher | ASCE | |
title | Nonlinear Rheological Characterizations of Reactive Elastomeric Terpolymer-Modified Asphalt Binder Based on Large-Amplitude Oscillatory Shear Test | |
type | Journal Article | |
journal volume | 35 | |
journal issue | 12 | |
journal title | Journal of Materials in Civil Engineering | |
identifier doi | 10.1061/JMCEE7.MTENG-16597 | |
journal fristpage | 04023482-1 | |
journal lastpage | 04023482-14 | |
page | 14 | |
tree | Journal of Materials in Civil Engineering:;2023:;Volume ( 035 ):;issue: 012 | |
contenttype | Fulltext |