Examination of hot mix asphalt and binder performance modified with nano silica

Saltan, Mehmet; Terzi, Serdal; Karahançer, Şebnem

doi:10.1016/j.conbuildmat.2017.09.069

Cited by 74 publications

(21 citation statements)

References 4 publications

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“…Refs. [36][37][38][39][40] also made similar studies on the effect of nano-silica on asphalt binder and mixtures. Table 1 summarizes the review of previous studies on the characterization of asphalt binder modified with nano-silica.…”

Section: Nanomaterials and Their Application As A Modifier In Asphaltmentioning

confidence: 86%

“…[32] Nano-silica Improves the self-healing of HMA [10] Nano-silica Improves marshal stability, resilient modulus, and fatigue life [29] Nano-silica Enhances antiaging property and rutting and fatigue cracking performance [30] Nano-silica Improves temperature stability, decreases temperature cracking resistance and reduces susceptibility to moisture damage [28] Nano-silica Enhances the complex shear modulus and improves the anti-rutting performance of asphalt mixture [34] Nanosilica Reduces the susceptibility to moisture damage and increases the strength of asphalt mixes [35] Nano-silica Improves the performance and durability of asphalt mixtures [36] Nano-silica Improve rutting and fatigue performance of asphalt binder [37] Nano-silica Decreases the interaction between asphalt molecules and increases free volumes in the configuration [38] Nano-silica Decreases the consistency, rate of water absorption and porosity of the roller compacted concrete pavement [39] Nano-silica Improves the rheological characteristics, toughness, and viscosity of bitumen [40] Nano-silica Reduces the creep strain deformation and increases the dynamic shear modulus…”

Section: Type Of Nanomaterials Effect On Asphalt Binder and Mixturesmentioning

confidence: 99%

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Life Cycle Assessment for the Production Phase of Nano-Silica-Modified Asphalt Mixtures

2019

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To combat the rutting effect and other distresses in asphalt concrete pavement, certain modifiers and additives have been developed to modify the asphalt mixture to improve its performance. Although few additives exist, nanomaterials have recently attracted significant attention from the pavement industry. Several experimental studies have shown that the use of nanomaterials to modify asphalt binder results in an improved oxidative aging property, increased resistance to the rutting effect, and improves the rheological properties of the asphalt mixture. However, despite the numerous benefits of using nanomaterials in asphalt binders and materials, there are various uncertainties regarding the environmental impacts of nano-modified asphalt mixtures (NMAM). Therefore, this study assessed a Nano-Silica-Modified Asphalt Mixtures in terms of materials production emissions through the Life Cycle Assessment methodology (LCA), and the results were compared to a conventional asphalt mixture to understand the impact contribution of nano-silica in asphalt mixtures. To be able to compare the relative significance of each impact category, the normalized score for each impact category was calculated using the impact scores and the normalization factors. The results showed that NMAM had a global warming potential of 7.44563 × 103 kg CO2-Eq per functional unit (FU) compared to 7.41900 × 103 kg CO2-Eq per functional unit of the conventional asphalt mixture. The application of LCA to NMAM has the potential to guide decision-makers on the selection of pavement modification additives to realize the benefits of using nanomaterials in pavements while avoiding potential environmental risks.

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Section: Nanomaterials and Their Application As A Modifier In Asphaltmentioning

confidence: 86%

Section: Type Of Nanomaterials Effect On Asphalt Binder and Mixturesmentioning

confidence: 99%

Life Cycle Assessment for the Production Phase of Nano-Silica-Modified Asphalt Mixtures

2019

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“…During hot storage of polymer-modified bitumen (PMB), polymers tend to separate from the asphalt binders due to viscosity and density differences as well as incompatibility between the two components, which float and agglomerate at the top of the modified binders [31][32][33]. The instability of PMB motivates pavement engineers and researchers to find new materials to improve the performance of PMB.…”

Section: Research Objective and Significancementioning

confidence: 99%

Improving Storage Stability and Physicochemical Performance of Styrene-Butadiene-Styrene Asphalt Binder Modified with Nanosilica

et al. 2020

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Due to storage stability drawbacks of polymer-modified bitumen (PMB), this study investigated the storage stability and physicochemical performance of Styrene-Butadiene-Styrene (SBS) asphalt binders (herein PMB) modified with Silicone surface-treated nanosilica (SNS). Dosages 0% (control), 1.5%, 3% and 5% SNS powder were added to PMB to prepare modified binders. Hot storage, Viscosity, Multiple Stress Creep Recovery (MSCR), Scanning Electron Microscopy (SEM), Fluorescence Microscopy (FM), Linear Amplitude Sweep (LAS), Fourier Transform Infrared (FTIR), and Proton Nuclear Magnetic Resonance (1H-NMR) tests were conducted using modified binders. The study found that adding nanosilica powder to PMB improved storage stability, increased viscosity and complex modulus, and reduced rutting of binders. However, this bitumen modification was not beneficial to fatigue cracking. The performance improvement was because of the interaction between the polymer and nanosilica, creating a new polymer-nanosilica network which lowered the dynamics around the SNS particles, thereby reducing phase separation. Further, the Silicone Si–O–Si backbone bond present in SNS modified asphalt binder reduced temperature sensitivity thereby preventing thermal degradation at high storage temperature. Nanosilica modified binders presented well-dispersed nanosilica particles in the asphalt matrix. The modification mechanism was predominantly physical. Overall, the study concluded that nanosilica improves storage stability, rutting, and morphology of PMB binders.

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“…Nanosilica is recognized as a modifer of asphalt for its superior stability, thixotropy, reinforcing, and thickening properties [20][21][22]. Yao et al found that the antiaging property and rutting and fatigue cracking performance of nanosilica modified asphalt binders are enhanced, and the addition of nanosilica in the control asphalt asphalt mixture significantly improves the dynamic modulus, flow number, and rutting resistance of asphalt mixtures [23].…”

Section: Nano Hydrophobic Silane Silicamentioning

confidence: 99%

Evaluation of the Durability and the Property of an Asphalt Concrete with Nano Hydrophobic Silane Silica in Spring-Thawing Season

Guo

Sun

et al. 2018

Applied Sciences

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In the spring-thawing season, the high frequency of freeze-soak-scour cycles in the short term is the main cause of pavement damage in the frozen region. One of the methods to improve the durability of asphalt concrete in spring-thawing season is to add suitable modifiers and additives which improve adhesion between asphalt binder and aggregate. This study evaluates the effect of nano hydrophobic silane silica (NHSS) on the performance damage of asphalt concrete (AC) in spring-thawing season. The effectiveness of nano hydrophobic silane silica was evaluated by conducting mixture tests after different freeze-soak-scour cycles, and the damage model of NHSS modified asphalt concrete was established based on the logistic damage model. The results showed that adding NHSS is an effective technique for mitigating freeze-soak-scour cycle damage of asphalt concrete in spring-thawing season. Moreover, the influence of scour, soak, and freeze—three separate factors on NHSS-modified AC in spring-thawing season—was discussed based the gray rational degree theory. The results illustrated that the freeze factor had a more significant impact on the damage process of NHSS modified asphalt concrete compared with the soak and scour factor.

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Examination of hot mix asphalt and binder performance modified with nano silica

Cited by 74 publications

References 4 publications

Life Cycle Assessment for the Production Phase of Nano-Silica-Modified Asphalt Mixtures

Life Cycle Assessment for the Production Phase of Nano-Silica-Modified Asphalt Mixtures

Improving Storage Stability and Physicochemical Performance of Styrene-Butadiene-Styrene Asphalt Binder Modified with Nanosilica

Evaluation of the Durability and the Property of an Asphalt Concrete with Nano Hydrophobic Silane Silica in Spring-Thawing Season

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