Each year in Quebec, 400 000 tonnes of fine screening residues from deconstruction, renovation and demolition (CRD) debris are sent to technical landfills as covering material.
The objective of this project is to study the influence of post-consummer fines on the rheological behavior of bituminous mastics in order to find a way to recycle these materials. To do this, 7 CRD fines (concrete, gypsum, ceramic, porcelain, glass, limestone and brick), 2 industrial fines (hydrated lime and clay) and 3 fines composed of CRD materials combined (2 natural and 1 artificial) were studied. Their main properties (density, grain size, Rigden Void’s and methylene blue value) were determined. For each fine, mastics were made from PG 64H-28 bitumen and 4 fines content (20, 40, 60 and 70%) by weight.
The rheological behaviour of the mastic was mainly stydied from dynamic shear tests and the master curves of the mastics were obtained using a method based on Kramers-Kronig relations.The use of complex reinforcement coefficient C * R has made it possible to compare the different mastics, to highlight the influence of the nature of the fines as well as their content. In addition, different predictive models of the stiffening power based on the properties of fines have been studied. Finally, a 2S2P1D model was applied to all mastics and a method improving the calibration of the model is proposed.
Results of the tests show that the addition of CRD fines increase the stiffness of bituminous mastics as well as their elastic modulus. These resultats also show that the particle size, the Rigden Voids and the content of fines in mastics are the main parameters influencing the rheological behaviour of the mastics. Finally, it is observed that the presence of fibers in fines of the screeing residues greatly influence the behaviour of mastics.
| Date | 5 Jul 2022 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Michel Vaillancourt (Supervisor) & Alan Carter (Co-supervisor) |
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Michel, Q. (Author),
Vaillancourt (Supervisor) &
Carter (Co-supervisor),
5 Jul 2022Student thesis: Master's thesis › Master in Engineering: Construction Engineering