Results 141 to 150 of about 312 (174)
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Bitumen Rejuvenator Diffusion as Influenced by Ageing
Road Materials and Pavement Design, 2002ABSTRACT This paper describes studies to illuminate the process of mixing old and new binder during asphalt recycling, or, more precisely, mixing by diffusion. FTIR-ATR (Fourier Transform Infrared Spectroscopy by Attenuated Total Reflectance) is used to study effects of the degree of ageing on the diffusion process.
Robert Karlsson, Ulf Isacsson
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Rheological aspects of the rejuvenation of aged bitumen
Rheologica Acta, 2006Rheological techniques are used to investigate the rejuvenation of aged bitumen. The thermal transition associated with the collapse of the compact structure constituted by asphaltene is determined by Dynamic Mechanical Thermal Analysis. For aged bitumen, this transition shifts to a higher temperature but when rejuvenating agents are added, the ...
Ramón Romera +6 more
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On the rejuvenator dosage optimization for aged SBS modified bitumen
Construction and Building Materials, 2021Abstract The rejuvenator dosage in bituminous binders is critical, as it has to be balanced to ensure the restoration of rheological properties without over-softening the recycled binders. In this study, the impact of dosage of different rejuvenators on a polymer modified bitumen was evaluated by conducting rheological tests at low, medium and high ...
Peng Lin +7 more
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Fuel: The integration of reclaimed asphalt pavement with sustainable bio-based materials holds significant promise for enhancing both the economic and environmental sustainability of asphalt roads.
Shisong Ren +2 more
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Construction and Building Materials, 2020
Abstract Challenges are existing when applying high percentages of reclaimed asphalt pavement (RAP) into construction as the aged RAP binder became more brittle, and stiffer after second-round usage. The bio-rejuvenator with dramatic environmental effects can alleviate stiffness and increases viscous components of aged RAP binder and is becoming ...
Jiangmiao Yu +4 more
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Abstract Challenges are existing when applying high percentages of reclaimed asphalt pavement (RAP) into construction as the aged RAP binder became more brittle, and stiffer after second-round usage. The bio-rejuvenator with dramatic environmental effects can alleviate stiffness and increases viscous components of aged RAP binder and is becoming ...
Jiangmiao Yu +4 more
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Investigating Aging and Rejuvenation Mechanism of Biomodified Rubberized Bitumen
Journal of Materials in Civil Engineering, 2021AbstractThis study examines the effects of five biomodifiers on the aging and rejuvenation of biomodified rubberized bitumen.
Sk Faisal Kabir, Elham H. Fini
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Laboratory evaluation of rejuvenation effect of reactive rejuvenator on aged SBS modified bitumen
Materials and Structures, 2017A reactive rejuvenator (RR) containing epoxy functional groups and a conventional rejuvenator (CR) were used to regenerate the aged SBS modified bitumen (SBSMB). Effects of two kinds of rejuvenators on physical properties, rheological properties, chemical structure and phase morphology of the aged SBSMB were investigated.
Song Xu +4 more
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Application of FTIR-ATR to Characterization of Bitumen Rejuvenator Diffusion
Journal of Materials in Civil Engineering, 2003Fourier transform infrared spectroscopy by attenuated total reflectance (FTIR-ATR) has been applied to laboratory studies of bitumen rejuvenator diffusion. Previous studies have given more indications rather than a real understanding of the mechanisms involved. FTIR-ATR can be performed in a relatively easy manner to provide diffusion measurements.
Robert Karlsson, Ulf Isacsson
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Analysis of bitumen ageing processes and innovative techniques for the rejuvenation
International Conference on Road and Rail Infrastructure, 2018Bitumen (asphalt) oxidative aging is one of the prevalent causes of the pavement distresses which results asphalt pavement susceptibility to fatigue and low temperature cracking. Ultimately, aging of asphalt leads to pavement failure after years of usage. Environmental and financial issues raise demand of effective pavement materials recycling. However,
Rita Kleiziene +2 more
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Rheological Modelling of the Bitumen from Reclaimed Asphalt with Rejuvenation and Re-ageing
2021Hot recycling of reclaimed asphalt (RA) in new asphalt concrete (AC) allows achieving large environmental and economic benefits. However, the aged bitumen in RA has a stiff and brittle behaviour, which may lead the AC to premature fatigue, thermal and reflection cracking.
Edoardo Bocci +2 more
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