Linear and nonlinear viscoelastic and viscoplastic analysis of asphalt binders with warm mix asphalt additives

Sadeq, Mohammed; Masad, Eyad; Al-Khalid, Hussain; Şirin, Okan; Mehrez, Loujaine

doi:10.1080/10298436.2016.1213592

Cited by 22 publications

(4 citation statements)

References 14 publications

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“…In other words, creep compliance (Jnr3.2) values of CR at both stress levels decrease by using the Sasobit additive. This effect of Sasobit addition is also determined in another study (Sadeq, Masad, Al-Khalid, Sirin, & Mehrez, 2018). Besides, considering the Jnr3.2 values especially at high temperatures, 4% SBS and 5% CR+2% Sasobit modified binders yield nearly similar creep compliance values, while 5% CR+2% Sasobit at 0.1 kPa stress level reveal lower creep compliance values.…”

Section: Mscr Test Resultssupporting

confidence: 65%

Investigation of rutting, fatigue and cracking resistance parame-ters of CR modified warm asphalt binders compare with SBS modified binders

Akpolat

2022

rdlc

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This study compares the rutting and cracking resistance and fatigue parameters of crumb rubber (CR) modified warm asphalt binders, which were determined by viscoelastic continuum damage (VECD) theory. The effect of the combination of CR modification and Sasobit, a warm mix additive, was investigated. Performance of CR + Sasobit compound was compared with styrene-butadiene-styrene (SBS) modification. Newly developed rheological tests such as multi stress creep recovery (MSCR), lineer amplitude sweep (LAS) and conventional tests were applied to modified binders. It was determined that the CR + Sasobit modified binders improved the rutting parameter better in comparison to SBS-added binders. Although the CR additive improved the rheological properties of the binder at low and medium temperatures, this effect was reduced when used with Sasobit additive. Sasobit additive increased the stiffness and decreased the fatigue parameter at low temperatures. Besides, the results of the LAS test revealed that at high strain values (i.e.> 6%), the fatigue life of CR and Sasobit modified binders was lower than the fatigue life of the pure binder. In other words, CR and Sasobit modified binders could not preserve material integrity.

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Section: Mscr Test Resultssupporting

confidence: 65%

Investigation of rutting, fatigue and cracking resistance parame-ters of CR modified warm asphalt binders compare with SBS modified binders

Akpolat

2022

rdlc

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“…(15) In the second step, an amplitude sweep is carried out to identify the damage accumulation of the binders over a range of amplitude levels linearly from 0 to 30% at a constant frequency level of 10 Hz in 5 min. e viscoelastic continuum damage (VECD) model is introduced to determine the fatigue life of the binders [43][44][45][46]. By means of the VECD theory, the fatigue behavior under varying strain levels of binders can be predicted [47].…”

Section: Linear Amplitude Sweep (Las)mentioning

confidence: 99%

Research on Rheological Properties of High‐Percentage Artificial RAP Binder with WMA Additives

Wang

Huang

Qin

et al. 2020

Advances in Materials Science and Engineering

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With the development of pavement recycling technology, the requirement of reclaimed asphalt pavement (RAP) is substantially increasing. Warm-mix recycled asphalt (WMRA) technology has made great progress, which can effectively decrease the working temperature and improve the RAP content. In this study, the rheological properties of recycled binders with incorporation of high-percentage artificial RAP binder (30–70%) were evaluated using two types of warm-mix asphalt (WMA) additives, i.e., polyethylene wax R and surfactant M. The dynamic shear rheometer (DSR) and beam bending rheometer (BBR) tests were conducted on the recycled binders. The results showed that the temperature and frequency played an important role in determining the complex shear modulus of the high-percentage WMRA binders. The dependency of phase angle on frequency increased after the long-term aging. The WMA additive R had a relatively huge impact on the rheological properties of asphalt, which mainly occurred before the PAV aging of recycled asphalt binder; the WMA additive M had no significant impact on the rheological properties of recycled asphalt binder. The WMA additive R enhanced the low-temperature rheology of recycled asphalt binder, while the WMA additive M enhanced the high-temperature rheology of recycled asphalt binder. Both of these types of WMA additives improved the antifatigue performance of recycled asphalt binder. The increased content of RAP binder improved the high-temperature performance and reduced the low-temperature performance of the recycled asphalt binder. However, it had no obvious impact on the fatigue performance. In addition, there was a good linear relation between the RAP binder content and the two indexes of the multiple stress creep recovery (MSCR) test.

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“…Since Sasobit crystallizes in the asphalt binder when cooled, its rheological properties are enhanced. Studies have shown that, when increasing the Sasobit content, the high-temperature performance grade (PG) increases [14,15], and the non-recoverable creep compliance (J nr ) decreases, i.e., increasing the traffic level at any given temperature grade [16][17][18]. As for intermediate temperatures and fatigue resistance, Sasobit has shown the potential to enhance fatigue resistance when a lateral amplitude sweep test (LAS) is carried out [19,20].…”

Section: Introductionmentioning

confidence: 99%

Rheology of Crumb Rubber-Modified Warm Mix Asphalt (WMA)

Al-Khateeb,

Sukkari,

Ezzat

et al. 2024

Polymers

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This study explores the impact of adding waste vehicular crumb rubber to the commercially available warm mix additives Sasobit® and Zycotherm® on modified asphalt binders’ physical and rheological properties. Various concentrations of crumb rubber (0%, 10%, 15%, and 20%) were introduced to asphalt binder samples with 2% and 4% Sasobit and 1.5% and 3% Zycotherm. The investigation employed conventional tests (penetration and softening point) and advanced mechanical characterization tests, including Superpave rotational viscosity (RV), Dynamic Shear Rheometer (DSR), DSR multi-stress creep recovery (MSCR), DSR linear amplitude sweep (LAS), and Bending Beam Rheometer (BBR). Traditional tests measured the asphalt consistency, while workability was assessed through the RV test. The results showed that the Zycotherm binders experienced a more significant penetration reduction than the Sasobit binders. Additionally, an increased crumb rubber content consistently elevated the softening point and rotational viscosity, enhancing the complex shear modulus (G*) values. Rubberized binders exhibited an improved rutting performance and low-temperature PG grades. Increasing the crumb rubber content enhanced fatigue life, with Z1.5CR20 and S2CR20 demonstrating the longest fatigue lives among the Zycotherm and Sasobit binders, respectively. Overall, Z1.5CR20 is recommended for colder climates, while S2CR20 is suitable for hot-climate applications based on extensive analysis.

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Linear and nonlinear viscoelastic and viscoplastic analysis of asphalt binders with warm mix asphalt additives

Cited by 22 publications

References 14 publications

Investigation of rutting, fatigue and cracking resistance parame-ters of CR modified warm asphalt binders compare with SBS modified binders

Investigation of rutting, fatigue and cracking resistance parame-ters of CR modified warm asphalt binders compare with SBS modified binders

Research on Rheological Properties of High‐Percentage Artificial RAP Binder with WMA Additives

Rheology of Crumb Rubber-Modified Warm Mix Asphalt (WMA)

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