Investigation of impact of a crumb rubbergranulate addition on the asphalt mixtures resistanceto water and frost
Damian Wiśniewski
damian.wisniewski@utp.edu.plFaculty of Civil and Environmental Engineering and Architecture; University of Technology and Life Sciences in Bydgoszcz; (Poland)
Milena Selke
Listener of second-cycle studies in the field of construction; University of Technology and Life Sciences in Bydgoszcz; Faculty of Civil and Environmental Engineering and Architecture; (Poland)
Anna Smolińska
Listener of second-cycle studies in the field of construction; University of Technology and Life Sciences in Bydgoszcz; Faculty of Civil and Environmental Engineering and Architecture; (Poland)
Mieczysław Słowik
Institute of Civil Engineering; Faculty of Civil and Environmental Engineering; Poznan University of Technology; (Poland)
Abstract
The article presents the results of the tests of hot mix asphalt (HMA) modi-fi ed with the addition of crumb rubber granulate using the dry method. This modifi cation consisted in the applying of rubber granules into the aggregate mixture, replacing a 0/2 mm fraction of the basalt aggregate. The tests were carried out for the Asphalt Concrete to be used in binder course of a road pavement (AC16W 50/70). There were 5 types of HMA analyzed: without the addition of rubber granules as well as with 1% or 2% (in relation to the weight of the aggregate mix) of activated with a grain size up to 2 mm and non-activated rubber granules with the same grain size. The activation process was carried out using an electro-magnetic mill with a microwave generator, centrifugal rotor mill with supersonic speed and auxiliary equipment. For each analyzed mixture type, density, bulk density, air voids and resistance to water and frost were determined. On the basis of the research, it was observed that the addition of crumb rubber granules to HMA adversely affects the air voids content causing its increase. The addition of crumb rubber granulate also affects the resistance of HMA to water and frost, but the quantitative changes depend on the amount of added crumb rubber granulate.
Keywords:
ITSR, indirect tensile strength, bulk density, air voids content, activated rubberReferences
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Authors
Damian Wiśniewskidamian.wisniewski@utp.edu.pl
Faculty of Civil and Environmental Engineering and Architecture; University of Technology and Life Sciences in Bydgoszcz; Poland
Authors
Milena SelkeListener of second-cycle studies in the field of construction; University of Technology and Life Sciences in Bydgoszcz; Faculty of Civil and Environmental Engineering and Architecture; Poland
Authors
Anna SmolińskaListener of second-cycle studies in the field of construction; University of Technology and Life Sciences in Bydgoszcz; Faculty of Civil and Environmental Engineering and Architecture; Poland
Authors
Mieczysław SłowikInstitute of Civil Engineering; Faculty of Civil and Environmental Engineering; Poznan University of Technology; Poland
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