Hydrophobic chemical treatment of aggregate surfaces to re-engineer the mineral/bitumen interface and improve bitumen adhesion

Bagshaw, Stephen A.; Kemmitt, Tim; Brooke, Samuel J.; Waterland, Mark R.; Fertel, Larry

doi:10.1080/14680629.2020.1713200

Cited by 7 publications

(3 citation statements)

References 26 publications

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“…Another interesting result was that the products of coating and mixing did not show any significant results, the water contact angles differing by no more than 1.1°. Although bitumen is a hydrophobic material due to its composition consisting of naphthenic acid, other mineral aggregates are hydrophilic, so that the condition is fundamentally incompatible to provide a superhydrophobic effect [37]. Therefore, it can be concluded that modified silica nanoparticles can be used for the large-scale fabrication of superhydrophobic surfaces on the bitumen, which can protect the degradation of the bitumen on the road.…”

Section: Resultsmentioning

confidence: 99%

A facile approach to synthesis of silica nanoparticles from silica sand and their application as superhydrophobic material

Ismail

Saputri

Dwiatmoko

et al. 2021

Journal of Asian Ceramic Societies

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We present a facile method to produce silica nanoparticles as a superhydrophobic material which has been successfully synthesized by mechanical milling and the sol-gel method. The powder obtained was characterized using scanning electronic microscopy, X-Ray Diffraction, particle size distribution, and zeta potential. The effects of alcohol solvents on synthesis, such as on particle size, particle size distribution, and zeta potential, were examined thoroughly. To evaluate the surface modification of silica nanoparticles from hydrophilic to hydrophobic properties, IR spectra was applied. Surface modification was conducted prior to the evaluation of the superhydrophobic properties of silica nanoparticles on the glass substrate. In this study, silica nanoparticles in the ethanol solvent achieved optimum results with a particle size of 170.3 ± 14.3 nm and the highest zeta potential of −50.4 ± 0.3 mV, which is the best superhydrophobic effect on the glass substrate. In addition, the superhydrophobic effect of the silica nanoparticles was also applied to the bitumen, as both coating and mixing with the water contact angle was increased to 149.2° and 148.1° compared to the bitumen without silica nanoparticles. Due to their simplicity and low-cost, modified silica nanoparticles show great potential for industrial applications as superhydrophobic material on the bitumen.

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Section: Resultsmentioning

confidence: 99%

A facile approach to synthesis of silica nanoparticles from silica sand and their application as superhydrophobic material

Ismail

Saputri

Dwiatmoko

et al. 2021

Journal of Asian Ceramic Societies

View full text Add to dashboard Cite

show abstract

“…Many different adhesion enhancers have been utilized, all of which aim to change the surfaces of aggregates by rendering them hydrophobic through treatment with various chemicals. Bagshaw et al [ 110 ] employed alkyl phosphonate or alkyl phosphate surface modifiers. Following this treatment, the interfacial free energy of the aggregates surface/bitumen interface becomes favoured over that of the aggregates surface/water interface which led to a very strong aggregate/bitumen adhesion that resisted de-bonding by water.…”

Section: Factors Affecting Bitumen Propertiesmentioning

confidence: 99%

Durability of bitumen binder reinforced with polymer additives: Towards upgrading Nigerian local bitumen

Olalekan,

Olatunde,

Kolapo

et al. 2024

Heliyon

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“…at a slope of 2.5%. This occurred because of the hydrophobic characteristic of tire-derived crumb rubber compared with hydrophilic character of the mineral aggregates, that is, the adhesion between the water molecules and rubber is lower than that of the mineral aggregate since the tire surface includes 62% oil and rubber (58,59). Also, studies showed a water droplet contact angle value of around 93°for tire-derived particles (59) which is higher than the 90°typical contact angle for hydrophobic surfaces, such as alkanes and oils (Figure 13).…”

Section: Effects Of Contributing Factorsmentioning

confidence: 99%

Water Film Depth Prediction Model for Highly Textured Pavement Surface Drainage

Pourhassan

Gheni

ElGawady

2021

Transportation Research Record

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Water film depth (WFD) is an important factor for road traffic safety because of its direct connection with skid resistance, hydroplaning speed, and the tendency of splash and spray. Increasing the pavement macrotexture reduces WFD. However, existing models for WFD prediction have not been developed on highly textured surfaces such as chip seal. Furthermore, the rainfall intensities used for developing most of these models were relatively low, leaving no or low WFD on chip seal surfaces. To propose a WFD prediction model suitable for highly textured surfaces and to consider the effect of surface material type, an experimental study was conducted with 154 different combinations of mean texture depth (MTD), surface material type, surface slope, drainage length, and rainfall intensity. The tests were carried out on chip seal specimens using a full-scale rainfall simulator. Test results from 1,784 WFD readings indicated that the Gallaway and PAVDRN models were not accurate for highly textured surfaces used in this study with MTD ranging from 0.05 to 0.20 in. Two experimental models were, therefore, proposed to predict the WFD; both models displayed a significantly higher correlation between the measured and predicted WFD compared with the existing models. Furthermore, the eco-friendly rubberized chip seal showed an enhanced drainage capability compared with conventional chip seal, especially in low slopes, because of the hydrophobic nature of crumb rubber versus the hydrophilic character of mineral aggregates. Accordingly, the proposed model incorporated a term to consider the effect of surface material type.

show abstract

Hydrophobic chemical treatment of aggregate surfaces to re-engineer the mineral/bitumen interface and improve bitumen adhesion

Cited by 7 publications

References 26 publications

A facile approach to synthesis of silica nanoparticles from silica sand and their application as superhydrophobic material

A facile approach to synthesis of silica nanoparticles from silica sand and their application as superhydrophobic material

Durability of bitumen binder reinforced with polymer additives: Towards upgrading Nigerian local bitumen

Water Film Depth Prediction Model for Highly Textured Pavement Surface Drainage

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