Use of Surface Free Energy method to evaluate the moisture susceptibility of sulfur extended asphalts modified with antistripping agents

Shafabakhsh, Gholamali; Faramarzi, Masoud; Sadeghnejad, Mostafa

doi:10.1016/j.conbuildmat.2015.08.123

Cited by 50 publications

(16 citation statements)

References 13 publications

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“…The findings showed that adding NZ was a successful technique to compensate the deteriorated adhesion due to using sulfur. Also it was demonstrated that SFE test results were so compatible with the common mechanical tests in predicting moisture damages [34]. Zhang et al (2016) evaluated the moisture sensitivity of different aggregate-bitumen combinations through three different approaches: surface energy, peel adhesion and the Saturation Ageing Tensile Stiffness (SATS) tests.…”

Section: Literature Reviewmentioning

confidence: 96%

“…The results indicated that although zycotherm significantly improves water susceptibility performance of asphalt mixtures pre-pared with all aggregate types and gradations, it does not function properly as a WMA additive because an effective additive should improve both the unconditioned and moisture conditioned characteristics of bituminous mixtures to make sure appropriate performance of asphalt pavements in the long run [33]. Shafabakhsh et al (2015) aimed to improve it by reinforcing the adhesion between asphalt binder and aggregate. An anti-stripping additive named nanotechnology Zycotherm (NZ) was used to achieve this goal.…”

Section: Literature Reviewmentioning

confidence: 99%

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Examining the Effect of Dry Resin on Moisture Sensitivity of Asphaltic Mixtures

Jajin

Hamedi

2018

CivileJournal

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Moisture damage in asphaltic mixtures is defined by the loss of durability and resistance caused by the effect of moisture. The most common way to improve moisture damage in asphaltic mixtures is to use anti-strip additives. This study tended to use dry resin polymer additive to make a moisture-resistant asphaltic mixture. Two types of aggregate indicating different sensitivities against moisture were studied. In order to compare the effect of this material with other anti-strip additives, this study evaluated the effect of hydrated lime on reducing moisture damage and comparing its effect with dry resin polymer additive. The effect of these materials was evaluated by mechanical and thermodynamic concepts using indirect tensile ratio and surface free energy. The results indicated that dry resin polymer used in this study increased alkaline content and reduced acidic content of bituminous surface free energy, resulting in more adhesion between acidic aggregates which are more sensitive to resistance. It also improved bitumen-aggregate adhesion and reduced strip rate. Moreover, hydrated lime as an aggregate anti-strip agent and dry resin polymer as a bituminous modifier significantly increased the resistance of warm asphalt mixtures against moisture. The results of this study show that dry resin polymer can be used as an anti-strip agent instead of hydrated lime with operational problems.

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Section: Literature Reviewmentioning

confidence: 96%

Section: Literature Reviewmentioning

confidence: 99%

Examining the Effect of Dry Resin on Moisture Sensitivity of Asphaltic Mixtures

Jajin

Hamedi

2018

CivileJournal

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“…The utilization of biomass and bio-waste products to boost asphalt binder properties has been investigated by various researchers [7][8][9][10]. Researchers have studied natural rubber latex (NRL) applications as a biopolymer [10][11][12][13][14][15] primarily to enhance the rheological characteristics of asphalt binders at varying temperatures and loading conditions. In this context [14] identified that a modified asphalt binder using NRL at different percentages resulted in enhanced resistance to both rutting and fatigue compared to the specimens fabricated utilizing base asphalt binder.…”

Section: Introductionmentioning

confidence: 99%

Storage Stability and Morphology of Latex Modified Bitumen

Usman¹,

Izzaty²,

Ibrahim³

et al. 2019

IJITEE

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Bitumen modification is done to enhance the properties of bitumen related to elasticity, temperature susceptibility, softening point etc. This research intends to assess the effects of natural rubber latex (NRL) in liquid form as a bitumen modifier. Conventional tests, temperature susceptibility and phase separation due to hot storage were investigated using two separate mixing speeds of 1200 and 1300 revolution per minutes (rev/min). Morphology due to the addition of NRL has also been explored utilizing Atomic Force Microscopy (AFM). NRL was incorporated into the bitumen by weight of the binder for the modification at three different amounts (i.e. 3%, 5% and 6%). Based on the softening point, penetration value, temperature susceptibility and storage stability the latex-modified asphalt binder were analyzed. Results of the investigation showed that owing to enhancement in viscoelastic properties, the latex-modified asphalt binder will not undergo phase separation during hot temperature storage. Meanwhile, a uniform dispersed network was indicated by the morphological analysis with the presence of three phases of para, peri and cata. It can be deduced from the results obtained that the latex-modified asphalt binders will perform better in terms of softening point, penetration value and susceptibility due to temperature.

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“…Traditionally, elemental sulfur has been used for fungicide, gunpowder, mercury removal, etc., in addition to other important modern applications such as vulcanization of black rubber . Alternatively, sulfur has been converted to other chemicals, for instance, fertilizers, additives for building materials, and sulfuric acid, which is one of the most largely synthesized compounds in chemical industry . Despite the cost effectiveness owing to its abundance as a byproduct of desulfurization of oil refinery streams, elemental sulfur could not been widely utilized: natural sulfur which exists as an orthorhombic phase of ring structure (S 8 ) in ambient conditions, is not easy to process due to its mechanical fragility, high melting point, and low solubility .…”

Section: Introductionmentioning

confidence: 99%

Solution‐based Sulfur‐Polymer Coating on Nanofibrillar Films for Immobilization of Aqueous Mercury Ions

Lee

Kim

et al. 2017

Bulletin Korean Chem Soc

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Herein, we report the solution-based method for coating sulfur polymers on various substrate materials. First, sulfur polymers were synthesized by reacting elemental sulfur and 1,3-diisopropenylbenzene and dissolved in various organic solvents to search for solvents with good solubility. Next, the trend in film thickness of sulfur-polymer coating was systematically examined using the sulfur-polymer solutions in dichlorobenzene (DCB) and various materials with different surface energy. The nanofibrillar film made of the poly(vinyl alcohol) and poly(acrylic acid) (PVA-PAA) blend exhibited the most uniform/conformal deposition of sulfur polymer via dipping-coating, indicating that the DCB solution is most suitable for the well-controlled deposition of sulfur polymer on nanostructured materials with higher surface energy than 40 mN/m. Finally, the resultant sulfur polymer-coated nanofibrillar film showed high mercury ion uptake capacity (26 mg/g with 50 ppm Hg solution) even with a small amount of sulfur-based adsorbent (20 mg) loading on the film (40 mg). Our study suggests that the sulfur polymer solution can introduce the crucial properties of elemental sulfur on the surface of any conventional materials even with mechanical flexibility and nano/microscale structural complexity.

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Use of Surface Free Energy method to evaluate the moisture susceptibility of sulfur extended asphalts modified with antistripping agents

Cited by 50 publications

References 13 publications

Examining the Effect of Dry Resin on Moisture Sensitivity of Asphaltic Mixtures

Examining the Effect of Dry Resin on Moisture Sensitivity of Asphaltic Mixtures

Storage Stability and Morphology of Latex Modified Bitumen

Solution‐based Sulfur‐Polymer Coating on Nanofibrillar Films for Immobilization of Aqueous Mercury Ions

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