Use of Bioadvantaged Materials for Use in Bituminous Modification

Chen, Conglin; Podolsky, Joseph H.; Hernández, Nacú; Hohmann, Austin; Williams, R. Christopher; Cochran, Eric W.

doi:10.1016/j.trpro.2016.05.427

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…The bio-derived materials are produced using various raw materials and are combined with a bituminous binder in a wide range of proportions [8][9][10]. As studied earlier [11], such materials may also change the binder and asphalt mixture stiffness, allowing for rejuvenating action.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Fatigue Evaluation of Asphalt Mixtures Containing RAP Treated with a Bio-Agent

et al. 2017

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Environment conservation and diminishing natural resources caused an increase in popularity of the application of renewable bio-origin resources for the construction of road pavement. Currently, there are known additions of bio-origin materials for bitumen modification. Such material is also used as a flux additive for bitumen or as a rejuvenator once working with reclaimed asphalt pavement (RAP). This paper presents research dealing with asphalt mixtures with RAP modified with a bio-agent of rapeseed origin. The main idea of the conducted research was to apply more RAP content directly to the batch mix plant without extra RAP heating. The RAP used in this study was milled from a base asphalt layer; the addition of RAP stiffens new asphalt mixtures. A bio-agent, due to its fluxing action, was used to support the asphalt mixing process and to decrease the over-stiffening of the mixture caused by RAP addition. This research includes bitumen and mixture tests. For the bitumen study, three different bitumens (35/50, 50/70, and 70/100) were tested in a dynamic shear rheometer (DSR) for complex modulus G* and for phase angle |δ| in the temperature range 0-100 • C. The reference mixture and mixtures with 2.5% bio-agent were tested to assess the influence of RAP and the bio-agent addition on the asphalt mixture properties. Low temperature behavior (TSRST), stiffness, and fatigue resistance (4PB) were tested. Based on the bitumen test, it was determined that even a low rate of bio-agent (2.5%) beneficially changes bitumen properties at a low temperature; moreover, polymerization processes occurring in the second stage of the process improves bitumen properties at a high operational temperature. The research with these asphalt mixtures demonstrates that the bio-origin flux acts as a rejuvenator and allows for an application of 30% cold RAP. Thermal cracking resistance of the mixture with RAP and 2.5% bio-agent improved. The bio-agent removes unfavorable stiffening of RAP and increases the fatigue resistance of the asphalt mixture.

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Section: Introductionmentioning

confidence: 99%

Thermal and Fatigue Evaluation of Asphalt Mixtures Containing RAP Treated with a Bio-Agent

et al. 2017

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“…PS−PAESO has demonstrated its competitiveness toward SBS in bitumen modification. 38,39 The blend of bitumen and PS−PAESO showed a similar or better performance compared to SBS-modified bitumen in terms of complex shear modulus. However, a detailed investigation on the structure−property relationship of PS−PAESO is required.…”

Section: ■ Introductionmentioning

confidence: 93%

“…Herein we synthesize polystyrene- block -poly(acrylated epoxidized soybean oil) (PS–PAESO) thermoplastic elastomers by extending polystyrene macromonomers with AESO monomers via reversible addition–fragmentation chain transfer (RAFT) polymerization. PS–PAESO has demonstrated its competitiveness toward SBS in bitumen modification. , The blend of bitumen and PS–PAESO showed a similar or better performance compared to SBS-modified bitumen in terms of complex shear modulus. However, a detailed investigation on the structure–property relationship of PS–PAESO is required.…”

Section: Introductionmentioning

confidence: 97%

Self-Assembly of Poly(styrene-block-acrylated epoxidized soybean oil) Star-Brush-Like Block Copolymers

et al. 2020

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Here we report dynamic and thermodynamic aspects of the self-assembly in a series of branched-chain soybean-oilderived styrenic block copolymers produced via reversible addition−fragmentation chain transfer (RAFT) polymerization. These biobased materials display unusual domain expansion which has not been seen in conventional petroleum-based block copolymers. The chain architecture of poly(styrene-b-acrylated epoxidized soybean oil) (PS−PAESO) block copolymers varies from star-like to star-brush-like owing to the bulk and multifunctionality of the PAESO repeat unit. The self-assembly behavior is evaluated through a combination of (ultra) small-angle X-ray scattering (SAXS), transmission electron microscopy, and dynamic shear rheology. Microphase separation in PS−PAESO is kinetically limited due to sluggish chain dynamics that cannot be thermally accelerated due to interference from cross-linking reactions. Selective hydrogenation of the residual PAESO vinyl groups retards but does not eliminate cross-linking reactions, indicating that transesterification is also at play. SAXS experiments show that the PS−PAESO domain size scales nearly linearly with the number of statistical segments, with structures as large as d = 155 nm observed. We believe that domain dilation is related to bulky aliphatic side chains in PAESO domains that extend the primary chain backbone to produce a brush-like conformation. The understanding of the structure−property relationships of these new biobased block copolymers gives insights on the design of novel polymer architectures benefiting new applications.

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Laboratory investigation of using acrylated epoxidized soybean oil (AESO) for asphalt modification

Chen

Podolsky

Williams

et al. 2018

Construction and Building Materials

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Use of Bioadvantaged Materials for Use in Bituminous Modification

Cited by 9 publications

References 3 publications

Thermal and Fatigue Evaluation of Asphalt Mixtures Containing RAP Treated with a Bio-Agent

Thermal and Fatigue Evaluation of Asphalt Mixtures Containing RAP Treated with a Bio-Agent

Self-Assembly of Poly(styrene-block-acrylated epoxidized soybean oil) Star-Brush-Like Block Copolymers

Laboratory investigation of using acrylated epoxidized soybean oil (AESO) for asphalt modification

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