Moisture damage resistance of hot-mix asphalt made with recycled concrete aggregates and crumb rubber
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Moisture damage resistance of hot-mix asphalt made with recycled concrete aggregates and crumb rubberData
2017Cita bibliográfica
Pérez, I., Pasandín, A.R. (2017). Moisture damage resistance of hot-mix asphalt made with recycled concrete aggregates and crumb rubber. Journal of Cleaner Production, v. 165, 405-414.
Resumo
[Abstract:] To guarantee sustainable construction, we investigated the reuse of construction and demolition waste (CDW) as recycled concrete aggregate (RCA) for the manufacture of hot-mix asphalt (HMA) in place of natural aggregates. The use of waste tire rubber as a bitumen modifier could be a means of improving the water resistance of these mixtures. In this investigation, moisture damage resistance of HMA for binder course, type AC 22 bin S, was analysed. Percentages of 0% (control mixture), 35% and 42% RCA were used in place of natural aggregates. Two types of bitumen have also been used: a conventional B35/50 penetration grade bitumen and BC35/50, a crumb rubber modified bitumen. Volumetric properties and water resistance were determined by means of indirect tensile tests. The results indicate that contrary to expectations, mixtures made with BC35/50 do not display better water resistance than mixtures made with B35/50. Nevertheless, a mixture made with B35/50 or BC35/50 does comply with Spanish requirements. Additionally, reversibility of moisture damage resistance was clearly demonstrated in this research. This research may help to better understand the performance of HMA made with RCA and the drawbacks of using waste tire rubber as a bitumen modifier.
Palabras chave
Recycled concrete aggregates
Crumb rubber
Hot-mix asphalt
Moisture damage resistance
Crumb rubber
Hot-mix asphalt
Moisture damage resistance
Versión do editor
ISSN
0959-6526