Physical Testing of Adhesives

Shields, J. A.

doi:10.1016/b978-0-408-01356-7.50012-4

Cited by 2 publications

(2 citation statements)

References 33 publications

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“…Up to date, several different alternative binders have been studied, including engine oil residue, soybean oil, palm oil, fossil fuel, swine waste, and materials from pyrolysis [ 25 ]. Different vegetable oils have been investigated in recent times to determine their physical and chemical properties and to evaluate their applicability as bio-binders in the pavement industry [ 26 , 27 , 28 ]. Bio-oils are produced from plant matter and residues, such as municipal wastes, agricultural crops, and by-products from agriculture and forestry.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Study on New Alternative Binders through Re-Refined Engine Oil Bottoms (REOBs) and Industrial By-Product Additives

et al. 2021

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Recent studies have worked towards addressing environmental issues such as global warming and greenhouse gas emissions due to the increasing awareness of the depletion of natural resources. The asphalt industry is seeking to implement measures to reduce its carbon footprint and to promote sustainable operations. The reuse of several wastes and by-products is an example of a more eco-friendly activity that fulfils the circular economy principle. Among all possible solutions, the road pavement sector encourages, on one hand, the use of recycled materials as a partial replacement of the virgin lithic skeleton; on the other hand, it promotes the use of recycled materials to substituting for a portion of the petroleum bituminous binder. This study aims to use Re-refined Engine Oil Bottoms (REOBs) as a main substitute and additives from various industrial by-products as a full replacement for virgin bitumen, producing high-performing alternative binders. The REOBs have been improved by utilizing additives in an attempt to improve their specific properties and thus to bridge the gap between REOBs and traditional bituminous binders. An even larger amount of virgin and non-renewable resources can be saved using these new potential alternative binders together with the RAP aggregates. Thus, the reduction in the use of virgin materials is applied at the binder and the asphalt mixture levels. Rheological, spectroscopic, thermogravimetric, and mechanical analysis were used to characterize the properties, composition, and characteristics of the REOBs, REOB-modified binders, and asphalt mixes. Thanks to the rheological investigations of possible alternative binders, 18 blends were selected, since they behaved like an SBS-modified bitumen, and then they were used for producing the corresponding asphalt mixtures. The preliminary mechanical analysis of the asphalt mixtures shows that six mixes have promising responses in terms of stiffness, tensile resistance, and water susceptibility. Nevertheless, the high variability of recycled materials and by-products has to be taken into consideration during the definition of alternative binders and recycled asphalt mixtures. In fact, this study highlights the crucial effects of the chemical composition of the constituents and their compatibility on the behaviour of the final product. This preliminary study represents a first attempt to define alternative binders, which can be used in combination with recycled aggregates for producing more sustainable road materials. However, further analysis is necessary in order to assess the durability and the ageing tendency of the materials.

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Section: Introductionmentioning

confidence: 99%

Preliminary Study on New Alternative Binders through Re-Refined Engine Oil Bottoms (REOBs) and Industrial By-Product Additives

et al. 2021

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“…Polymeric colloids, often termed polymeric dispersions or latexes, typically comprise submicron polymer particles (termed the internal phase) that are uniformly dispersed in water (termed the continuous phase). , Polymeric colloids, including both natural (e.g., natural rubber latex) , and synthetic (e.g., acrylics and styrene-butadiene rubber latex), offer diverse compositions with high molecular weights, which are commonly on the order of 10–10 6 Da for emulsion-polymerized latexes . For many decades, polymeric colloids have enabled facile processing of high molecular weight polymers at low viscosities for a variety of applications including, most notably, paints, coatings, and adhesives. − However, prior works in VP of latexes primarily focus on the printing of porous structures. − Thus, a design challenge remains for 3D coalescence of latex particles to access the mechanical properties of high molecular weight polymers in printed objects. Moreover, polymeric colloids scatter incident VP irradiation during printing, and intelligent energy distribution schemes for mitigating this scattering remain unexplored.…”

Section: Introductionmentioning

confidence: 99%

3D Printing Latex: A Route to Complex Geometries of High Molecular Weight Polymers

Scott

Meenakshisundaram

Hegde

et al. 2020

ACS Appl. Mater. Interfaces

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Vat photopolymerization (VP) additive manufacturing fabricates intricate geometries with excellent resolution; however, high molecular weight polymers are not amenable to VP due to concomitant high solution and melt viscosities. Thus, a challenging paradox arises between printability and mechanical performance. This report describes concurrent photopolymer and VP system design to navigate this paradox with the unprecedented use of polymeric colloids (latexes) that effectively decouple the dependency of viscosity on molecular weight. Photocrosslinking of a continuous-phase scaffold, which surrounds the latex particles, combined with in situ computer-vision print parameter optimization, which compensates for light scattering, enables high-resolution VP of high molecular weight polymer latexes as particle-embedded green bodies. Thermal post-processing promotes coalescence of the dispersed particles throughout the scaffold, forming a semi-interpenetrating polymer network without loss in part resolution. Printing a styrene-butadiene rubber latex, a previously inaccessible elastomer composition for VP, exemplified this approach and yielded printed elastomers with precise geometry and tensile extensibilities exceeding 500%.

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Physical Testing of Adhesives

Cited by 2 publications

References 33 publications

Preliminary Study on New Alternative Binders through Re-Refined Engine Oil Bottoms (REOBs) and Industrial By-Product Additives

Preliminary Study on New Alternative Binders through Re-Refined Engine Oil Bottoms (REOBs) and Industrial By-Product Additives

3D Printing Latex: A Route to Complex Geometries of High Molecular Weight Polymers

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