Effect of bituminous material rheology on adhesion

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DOIResolve DOI: http://doi.org/10.3141/2044-11
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Journal titleTransportation Research Record
Pages96104; # of pages: 9
Subjectasphalt, bitumen, sealant, rheology, adhesion, testing; Roads/Pavement
AbstractBituminous materials are used in many civil engineering applications where adhesion to a substrate is essential for good performance. Yet, it is not possible to predict the adhesion strength of these materials. The particular case of bituminous crack sealants is of interest in this paper, where the effect of sealant viscosity, aging, test temperature and loading rates are investigated by means of a blister test. This test provides the bonding characteristics to a model aggregate in terms of interfacial fracture energy (IFE). From the testing of several sealants, it was found that pouring viscosity affects adhesion and that higher viscosities help to attain higher IFEs. Temperature was found to play a key role on bonding characteristics and failure mechanism because it affects the viscoelastic properties of the sealant. In other words, the glass transition temperature (Tg) was found to have a governing role on bonding characteristics. At temperatures above Tg, bond strength was found to be affected by sealant flow such that failure is flow related, i.e., cohesive failure prevails. At temperatures below the Tg, where sealants are stiff and bulk deformation is low, stress is directed towards the interface so that failure tends to be adhesive. In taking into account temperature and test rates, an IFE master curve was obtained for a sealant. Such curve may be used in predicting and comparing sealant IFE.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number50833
NPARC number20377364
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Record identifier6ced7170-22ef-4e66-afab-f12443916b05
Record created2012-07-24
Record modified2016-05-09
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