Laboratory study on the suitability of nano-silica as a modifier for asphalt binders

Sukhija, Mayank; Saboo, Nikhil; Yadav, Akhilesh Kumar; Rath, Chandana

doi:10.1016/j.conbuildmat.2021.124406

Cited by 21 publications

(6 citation statements)

References 76 publications

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“…According to the findings, the Jnr increases as the degree of stress increases from 100 to 3200 Pa. At increasing levels of stress, the effectiveness of modification is proven to be more This demonstrates the efficacy of nanosilica in enhancing bitumen binders' stress sensitivity [29]. At 100 Pa, the decreases of Jnr in comparison with the base bitumen were 46.27 %, 42.44 %, and 56.87 % when nanosilica was added at 2 %, 4 %, and 6 %, respectively.…”

Section: Mscr Testmentioning

confidence: 83%

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Rheological Properties of Hot and Warm Asphalt Binder Modified with Nanosilica

ALOTHMAN

Gökçekuş

Ali‬

2022

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The impact of base and zycotherm binders modified with various proportions of nanosilica (i.e., 2 %, 4 %, and 6 %) based on the weight of the binder at high-temperature performance was investigated. Brookfield viscosity, penetration, softening point, and storage stability tests were all conducted on base and modified binders. Moreover, the Superpave rutting parameter (G*/sin δ) and Multiple stress creep recovery (MSCR) were utilized to assess the resistance of binders to rutting. By observing the outcomes of the modified binder tests, the incorporation of nanosilica into the base and zycotherm binders improved temperature susceptibility. Binders modified with nanosilica showed remarkable storage stability at elevated temperatures, as the variation in softening point between the upper and bottom parts was less than 2.5 °C for all binders. Based on the outcomes of the Superpave rutting parameter, the inclusion of nanosilica enhanced the stiffness of the modified binders up to 130 % for 6 % of nanosilica, while the improvement was caused by 6 % of nanosilica with zycotherm was nearly 92 % at 70 °C. The MSCR test revealed that the base and zycotherm binders' recovery (R%) was 27.72 % and 25.99 % for 6 % of nanosilica and 6 % nanosilica with zycotherm, respectively, while the nonrecoverable creep compliance (Jnr) decreased by 56.87 % for 6 % of nanosilica, and 43.23 % for 6 % nanosilica with zycotherm at 100 MPa. The results show that the incorporation of nanosilica is capable of improving the rutting potential regardless of the levels of stress. The rheological characteristics of modified base and zycotherm binders were improved at all concentrations of nanosilica, with the optimal concentration being 6% nanosilica.

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Section: Mscr Testmentioning

confidence: 83%

“…Sukhija et al investigated the rutting resistance of neat asphalt binder after adding 2 % and 4% nanosilica. According to their findings, the inclusion of nanosilica raised the performance grade (PG), reduced Jnr, increased R%, and reduced stress susceptibility [29].…”

Section: Introduction *mentioning

confidence: 99%

Rheological Properties of Hot and Warm Asphalt Binder Modified with Nanosilica

ALOTHMAN

Gökçekuş

Ali‬

2022

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“…This tendency, however, is observed to be more evident at lower frequency ranges. Generally, lower frequencies indicate slower-moving vehicles, making the pavement more susceptible to rutting [31]. On the other hand, Fig.…”

Section: Master Curvesmentioning

confidence: 97%

Rheological Performance of ZycoTherm/Nano-Silica Composite Modified Binders at High and Low Temperatures

Ali‬

ALOTHMAN

Gökçekuş

2023

Turkish Journal of Civil Engineering

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This study aims to investigate the impact of control and warm mix binders modified with Nano-Silica on the asphalt binder functioning to resist rutting endurance and low-temperature cracking. According to asphalt binder weight, the percentages of Nano-Silica employed in this research were 2%, 4%, and 6%. The control and modified binders were evaluated by performing conventional and rheological tests. The rheological properties were examined by master curves, isochronal plots, multiple stress creep recovery (MSCR), Superpave rutting parameter, and bending beam rheometer. The outcomes implied that the performance of the asphalt binder (with or without ZycoTherm) improved when Nano-Silica was added concerning (G*/sin δ) parameter. The MSCR test demonstrated that the recovery (R %) of the control and warm mix binders improved whereas the non-recoverable creep compliance (Jnr) dropped, implying that Nano-Silica boosted the rutting potential. Moreover, it was observed at different temperatures that the values for the complex shear modulus raised when the phase angle values were reduced. Furthermore, at low temperatures, it is presumed that the performance of Nano-Silica modified asphalt binders will have minimal performance as opposed to the binders prepared with ZycoTherm, which prevents low-temperature cracking.

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“…The time-scan test was informed by the results of the NCHRP 9-10 project [20]. In order to avoid the phenomenon of test failure occurring at the asphalt-fixture interface at lower temperatures, and with reference to the literature [21][22][23], the time scan test temperature was chosen to be 30 • C. The other specific parameters of the time-scan test used in this study were 10 Hz test frequency, selection of parallel plates with a diameter of 8 mm and 2 mm spacing. The strain pattern was adopted, with a strain level of 5%.…”

Section: Time-scan Testmentioning

confidence: 99%

Study of the Molecular Components and Rheological Properties of Asphalt after Long-Term Aging under the Action of Moisture

Luo

Xie

Zhao³

et al. 2022

Sustainability

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This study aimed to investigate variations and relationships between molecular components and rheological properties during the long-term aging of SBS-modified asphalt by the action of moisture. The chemical components and changes in molecular weight during aqueous PAV aging were observed using a four-component test and GPC test, and these morphological changes were quantified. Viscosity tests, time-scan tests and damage-healing tests were carried out to investigate the rheological properties during the aging process. Finally, the mechanism of asphalt aging under the influence of moisture was discussed. The results showed that moisture facilitated the long-term aging of asphalt and complicated the aging behavior under pressure-aging conditions. The dissolution of certain hydrophilic groups may be responsible for the decrease in resin content. The fatigue and self-healing properties of asphalt were weakened by moisture during the aging process. This was mainly attributed to a decrease in the composition of the asphalt colloidal dispersion medium, which resulted in earlier and faster development of microcracks under repeated loading as well as retardation in the rate of asphalt surface approach, wetting and spreading. Under long-term aging in the presence of moisture, the molecular components of the asphalt showed significant correlations with the rheological properties. The results of this study can contribute to further explaining the influence of moisture on the thermal-oxidative aging of asphalt.

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Laboratory study on the suitability of nano-silica as a modifier for asphalt binders

Cited by 21 publications

References 76 publications

Rheological Properties of Hot and Warm Asphalt Binder Modified with Nanosilica

Rheological Properties of Hot and Warm Asphalt Binder Modified with Nanosilica

Rheological Performance of ZycoTherm/Nano-Silica Composite Modified Binders at High and Low Temperatures

Study of the Molecular Components and Rheological Properties of Asphalt after Long-Term Aging under the Action of Moisture

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