Changes in Rubber Due to its Interaction with Bitumen when Producing Asphalt Rubber

Peralta, J.; Silva, Hugo Manuel Ribeiro Dias da; Machado, A. V.; Pais, Jorge C.; Pereirâ, Paulo A. A.; Sousa, Jorge B.

doi:10.1080/14680629.2010.9690317

Cited by 51 publications

(14 citation statements)

References 12 publications

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“…It is reasonable to assume that the density of the bitumen does not change significantly in the case of interaction during the dry process, while the density of the bitumen changes significantly in the wet process [25].…”

Section: History Of the Dry Processmentioning

confidence: 99%

Crumb Rubber Modifier in Road Asphalt Pavements: State of the Art and Statistics

et al. 2019

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Tire rubber recycling for civil engineering applications and products is developing faster, achieving increasingly higher levels of maturation. The improvements in the material circle, where crumb rubber, generated as a by-product of the tire rubber making process, becomes the resource used for the construction of road asphalt pavement, is absolutely necessary for increasing the sustainability of the entire supply chain. The paper reports the results of an accurate data analysis derived from an extensive literature review of existing processes, technologies, and materials within construction of infrastructure. The current position, the direction, and rate of progress of the scientific efforts towards the reuse and recycling of tire rubber worldwide have been shown. Furthermore, an in-depth analysis of a set of important properties of Crumb Rubber Modified Asphalt has been carried out—fabrication parameters, standard properties, high and low-temperature performance, and rheological properties. Statistics over a sample of selected publications have been presented to understand the main processes adopted, rubber particle size, temperatures, and possible further modifications of crumb rubber modified binder.

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Section: History Of the Dry Processmentioning

confidence: 99%

Crumb Rubber Modifier in Road Asphalt Pavements: State of the Art and Statistics

et al. 2019

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“…The improvement is governed by the swelling process of rubber particles that interacted with bitumen. Rubber crumbs can swell up to 3 to 5 times its original size due to the absorption of maltenes component of the bitumen [3,4]. This left a higher proportion of asphaltenes in the binder, therefore increasing its viscosity.…”

Section: Introductionmentioning

confidence: 99%

A Review on the Effect of Crumb Rubber Addition to the Rheology of Crumb Rubber Modified Bitumen

Ibrahim

Katman

Karim

et al. 2013

Advances in Materials Science and Engineering

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Crumb rubber modification has been proven to enhance the properties of pure bitumen. This paper looks at some of the international standards for producing crumb rubber modified bitumen (CRMB) and reviews the effect of crumb rubber to the rheology of crumb rubber modified bitumen. The review shows that the rheology of CRMB depends on internal factors such as crumb rubber quantity, particle size, and pure bitumen composition, and external factors such as the mixing time, temperature, and also the modification technique. These factors govern the swelling process of crumb rubber particles that lead to the increase of viscosity of the modified bitumen. However, the mixing temperature and duration can cause rubber particles to depolymerize and subsequently cause loss of viscosity. Crumb rubber modification also improves the properties of bitumen by increasing the storage and loss modulus and enhancing the high and low temperature susceptibility. The effect of crumb rubber to aging properties of CRMB is also discussed. Finally several techniques of chemical modification to terminal blends of CRMB and the subsequent improvement to the settling property of CRMB are explained.

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“…During AR production the changes in the density of the bitumen, AR and rubber was assessed every 5 minutes, at the end of the interaction time the changes in the recovered rubber weight were measured as well. These results allowed the indirect measurement of the increase of the rubber volume (Peralta, 2009;Peralta et al, 2010;Peralta et al, 2010b). These data showed that the interaction with bitumen produces an increase in the rubber weight and a decrease in its density, thus a significant increase in the total volume of the recovered rubber was observed.…”

Section: Production and Separation Of The Asphalt-rubber Bindermentioning

confidence: 91%

Rheological changes in the bitumen caused by heating and interaction with rubber during asphalt–rubber production

et al. 2013

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The demand for more safe and durable roads, combined with the need to preserve the environment, led to the production and application of asphalt-rubber (AR) on roads. Nevertheless, this complex material lacks further study in order to better distinguish among the phenomena that take place during AR production, as they impact on the final product characteristics. Here we effectively quantify the rheological changes related to bitumen aging due to diffusion of small molecules of bitumen into the rubber particles and to the release of fillers from rubber into the bitumen during AR production. A sphere AR production simulator was developed to assess AR aging independently. The comparison of the characteristic relaxation times of both AR and simulated AR shows that the aging alone cannot explain the rheological changes during AR production. The extent of the changes related to the combined effects of aging and filler release increases as the bitumen used to produce AR is softer.

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Changes in Rubber Due to its Interaction with Bitumen when Producing Asphalt Rubber

Cited by 51 publications

References 12 publications

Crumb Rubber Modifier in Road Asphalt Pavements: State of the Art and Statistics

Crumb Rubber Modifier in Road Asphalt Pavements: State of the Art and Statistics

A Review on the Effect of Crumb Rubber Addition to the Rheology of Crumb Rubber Modified Bitumen

Rheological changes in the bitumen caused by heating and interaction with rubber during asphalt–rubber production

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