Assessing the Effect of Nano Hydrophobic Silane Silica on Aggregate-Bitumen Interface Bond Strength in the Spring-Thaw Season

Guo, Wei; Guo, Xuedong; Li, Jilu; Li, Yingsong; Sun, Mei; Dai, Wenting

doi:10.3390/app9122393

Cited by 8 publications

(6 citation statements)

References 38 publications

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“…The surface-modified SiO 2 NPs using the OTES (SiO 2 @C8) and DTES (SiO 2 @C12) were characterized based on TGA (Figure a and Figure S2). Generally, the alkoxide group of the silane coupling agent is hydrolyzed (R-Si(OH) 3 ), and subsequently, a condensation reaction between silanol groups proceeds. , The weight loss observed in pristine SiO 2 particles (Figure a and Figure S2) originated from the dehydration and condensation of silanol groups on the surface of silica . Although the weight loss of pristine SiO 2 particles varied (1.8–4.2%), surface-modified SiO 2 particles exhibited more significant weight loss, revealing successful introduction of organic modifiers on the particle surface.…”

Section: Resultsmentioning

confidence: 99%

A Quantitative Approach to Characterize the Surface Modification on Nanoparticles Based on Localized Dielectric Environments

Mochizuki,

Sampei,

Suga

et al. 2024

Anal. Chem.

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Nanoparticles (NPs) are utilized for the functionalization of composite materials and nanofluids. Although oxide NPs (e.g., silica (SiO 2 )) exhibit less dispersibility in organic solvents or polymers due to their hydrophilic surface, the surface modification using silane coupling agents can improve their dispersibility in media with low dielectric constants. Herein, SiO 2 NPs were functionalized using octyltriethoxysilane (OTES, C8) and dodecyltriethoxysilane (DTES, C12), wherein the degrees of surface modification of SiO 2 @C8 and SiO 2 @C12 were quantitatively evaluated based on the ratio of modifier to surface silanol group (θ) and the volume fraction of organic modifier to total particle volume (ϕ R ). The variations of surface properties were revealed by analyzing the Hansen solubility parameters (HSP). Particularly, the surface modification using OTES or DTES significantly affected the polarity (δ P ) of NPs. The local dielectric environments of surface-modified SiO 2 NPs were characterized using a solvatochromic dye, Laurdan. By analyzing the peak position of the steady-state emission spectrum of Laurdan in a NP suspension, the apparent dielectric environments surrounding NPs (ε app ) were obtained. A good correlation between ϕ R and ε app was observed, indicating that ϕ R is a reliable quantity for understanding the properties of surface-modified NPs. Furthermore, the generalized polarization (GP) of NPs was investigated. The surface-modified SiO 2 NPs with higher ϕ R (≥0.15) exhibited GP > 0, suggesting that the modifiers are well-organized on the surface of NPs. The localized dielectric environment surrounding NPs could be predicted by analyzing the volume fraction of nonpolar moieties derived from modifiers. Alternatively, ε app and GP can be utilized for understanding the properties of inorganic−organic hybrid NPs.

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Section: Resultsmentioning

confidence: 99%

A Quantitative Approach to Characterize the Surface Modification on Nanoparticles Based on Localized Dielectric Environments

Mochizuki,

Sampei,

Suga

et al. 2024

Anal. Chem.

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“…The findings indicated that NHSS could, in certain situations, inhibit the F-T aging process of asphalt cement, but, NHSS being an inorganic material, its connection with asphalt cement is more likely to be destroyed under the F-T aging process. However [3], NHSS could increase the aggregate-bitumen interface shear strength under any working conditions, including spring thaw season. Moreover, paper [3] offers two models to evaluate the moisture damage degree and moisture damage rate of aggregate-bitumen interface shear strength.…”

Section: Binders' Modificationmentioning

confidence: 95%

“…However [3], NHSS could increase the aggregate-bitumen interface shear strength under any working conditions, including spring thaw season. Moreover, paper [3] offers two models to evaluate the moisture damage degree and moisture damage rate of aggregate-bitumen interface shear strength.…”

Section: Binders' Modificationmentioning

confidence: 95%

“…In this group of papers, two ( [2] and [3]) addressed the use of nano hydrophobic silane silica (NHSS) modification for asphalt cement and studied its behavior under freeze-thaw (F-T) aging conditions. The findings indicated that NHSS could, in certain situations, inhibit the F-T aging process of asphalt cement, but, NHSS being an inorganic material, its connection with asphalt cement is more likely to be destroyed under the F-T aging process.…”

Section: Binders' Modificationmentioning

confidence: 99%

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Special Issue on Nano-Modified Asphalt Binders and Mixtures to Enhance Pavement Performance

Picado-Santos

Crucho

2020

Applied Sciences

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This Special Issue is dedicated to the use of nanomaterials for the modification of asphalt binders to support the analysis of the relevant properties and to determine if the modification indicated a more efficient use of asphalt mixtures’ fabrication or their modification in the context of asphalt mixtures’ fabrication and the improvement (or lack thereof) of these last ones to constitute effective asphalt pavement layers [...]

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“…Continuous high temperature accelerates the aging of asphalt, and this short-term aging is inevitable. During the construction process, improper compaction will increase the effective voids and infiltration voids of asphalt [5], which will lead to asphalt long-term aging and moisture damage of asphalt mixture under the impact of wheel loading of cars and trucks, immersion of rainwater, high temperature softening in summer and low temperature cracking in winter [6][7][8][9]. In recent years, many scholars have analyzed the pavement properties of asphalt mixture by studying its macroscopic properties such as elastic modulus, creep strength, fracture toughness, adhesion and moisture damage resistance to verify the effect of modifier, aging of asphalt and mineral species of aggregates on the performance of asphalt mixture [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

The short-term aging effect on the interface and surface wetting behavior of modified asphalt mixtures

Wang

et al. 2022

Mater. Res. Express

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In this study, the interface models and nanodroplets wetting models of base asphalt (BA), polyurethane modified asphalt (PU-MA) and polyurethane/graphene oxide composite modified asphalt (PU/GO-MA) with acidic and alkaline aggregates were constructed. The adhesion and debonding effects of modifiers on short-term aged asphalt mixtures were analyzed by molecular dynamics (MD) simulation. The moisture damage resistance of the mixture was evaluated by simulating the wetting characteristics of asphalt and water nanodroplets on the aggregate surface. The contact angle, adhesion work, debonding work and relative concentration distribution can effectively analyse the interface interaction behavior between asphalt and aggregate. The results show that the adsorption effect between aged asphalt and CaCO3 was stronger, and short-term aging enhanced the interfacial adhesion of asphalt mixtures. Calcite was more hydrophilic, and its resistance to moisture damage was far less than quartz. The difference between the contact angle of water-aggregate and that of asphalt-aggregate can effectively analyze the water sensitivity of asphalt mixture. In addition, different components played different roles in the adsorption of asphalt and different aggregate surfaces. The synergistic analysis of the asphalt-aggregate interface and the asphalt nanodroplet-wetting aggregate surface can more comprehensively reveal the variation principle of asphalt parameters and nanoscale properties of asphalt mixtures.

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Assessing the Effect of Nano Hydrophobic Silane Silica on Aggregate-Bitumen Interface Bond Strength in the Spring-Thaw Season

Cited by 8 publications

References 38 publications

A Quantitative Approach to Characterize the Surface Modification on Nanoparticles Based on Localized Dielectric Environments

A Quantitative Approach to Characterize the Surface Modification on Nanoparticles Based on Localized Dielectric Environments

Special Issue on Nano-Modified Asphalt Binders and Mixtures to Enhance Pavement Performance

The short-term aging effect on the interface and surface wetting behavior of modified asphalt mixtures

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