Effect of Recycled Rubber on the Properties of Road Bitumen

Błażejowski, K.; Gawdzik, Barbara; Matynia, Tadeusz

doi:10.1155/2018/8759549

Cited by 4 publications

(2 citation statements)

References 14 publications

(13 reference statements)

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“…In analogy to the previous studies, modifications of bitumen with the de-vulcanized rubber and SBS in the presence of sulfur were performed at 190 and 220 • C [21,24]. The rubber was added at a concentration of 10 or 15% while the SBS concentration was constant at 2%.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, waste rubber management methods are particularly desirable for the production of pavements with properties corresponding to those of the polymer-modified asphalt. In our previous paper, both recycled rubber and synthetic polybutadiene were used as bitumen modifiers [21]. In this study, the results of bitumen modification using rubber and SBS are presented.…”

Section: Introductionmentioning

confidence: 99%

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The Use of De-Vulcanized Recycled Rubber in the Modification of Road Bitumen

2020

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Rubber from recycled car tires and styrene-butadiene-styrene (SBS) were used for the chemical modification of commercially available road bitumen 50/70 (EN 12591). The modification process began with the addition of rubber into asphalt and heating the whole amount at the temperature of 190 °C or 220 °C. Under such conditions, de-vulcanization of rubber took place. Next, SBS and sulfur as a cross-linker were added and the heating was continued so that cross-linking of SBS and the de-vulcanized rubber proceeded. In the studies on the influence of rubber concentration on the final properties of asphalt 10% or 15% of rubber was considered. Chemical modification reactions were performed within 2, 4, and 8 h. The results showed that both the modification at 190 °C and 220 °C affected the properties of the base asphalt efficiently, although the asphalt modified at 190 °C contained more non-degraded rubber. Increasing the modification time led to dissolution of the rubber crumbs and its de-vulcanization. Bitumens modified in this way are characterized by high storage stabilities. Their behavior at low temperatures also deserves attention.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%