Abstract

YUNG VARGAS, Yee Wan; CORDOBA MAQUILON, Jorge Eliécer  and  RONDON QUINTANA, Hugo Alexánder. Evaluation of abrasion of a modified drainage mixture with rubber waste crushed (GCR). Tecnura [online]. 2016, vol.20, n.50, pp.106-118. ISSN 0123-921X.  https://doi.org/10.14483/udistrital.jour.tecnura.2016.4.a08.

ABSTRACT Context: Porous asphalt mixtures are defined as an asphalt concrete with air voids content of around 20% and 25%, and the typical binder is a modified asphalt with some elastomeric polymer. Unlike other studies reported on the subject: i) The effect of mixing temperature between asphalt modified with GCR and stone materials (160 °C and 170 °C) was evaluated, ii) as the variation of compaction temperatures for each of (110 ºC, 130 ºC, 150 ºC) and (150 ºC, 160 ºC, 170 ºC), respectively. Method: This study measured in laboratory, the resistance to abrasion (Cantabria trial) and the stiffness under monotonic (Marshall test) and cyclical (resilient modulus) loading of a porous asphalt mixture MD. Asphalt cement CA 60-70 (PG 64-22) was used as binder. This binder was modified with recycling tyre rubber (GCR) by wet way (The GCR and binder are completely mixed to form asphalt rubber). Results: a significant increase in resistance to abrasion, resistance under monotonic loading and stiffness under cyclic loading of the MD is reported when this mixture is modified with GCR. Conclusion: The results showed that there is a highlighted influence of mix temperature (between asphalt and GCR) and compaction temperature (modified asphalt and aggregate) on the behavior of the MD modified with GCR.

Keywords : Modified asphalt; abrasive wear; porous asphalt; Marshall stability; GCR; Resilient modulus.

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