A study of the influence of the microstructure of one type of bitumen grade on the performance as a binder
article
Six different bitumina of comparable PEN grade were investigated to gain a relation between the composition
and the development of microstructures and their performance as binder material e.g. for road constructions.
It was shown, that especially bitumina with explicit microstructures show an intense
interaction between the asphaltene nucleated crystals (peri/catana phase) and solid (aggregate and/or filler)
surfaces. Consequently, the developed adhesive/cohesive interaction is also stronger in case of such
bitumina than in case of bitumina with extended continuous liquid phases (perpetua phase) and such
bitumina seem to be well suited for an application as binder material. This was possible by employing
a new designed micro-direct tensile test for quantitative determination of adhesive forces including
the possibility to study the nature of the failure upon testing.
The obtained data were correlated with AFM data from surface structure analysis and verified by other
data from literature and other experiments regarding the adhesive interaction of parts of the bitumen
with solid surfaces
and the development of microstructures and their performance as binder material e.g. for road constructions.
It was shown, that especially bitumina with explicit microstructures show an intense
interaction between the asphaltene nucleated crystals (peri/catana phase) and solid (aggregate and/or filler)
surfaces. Consequently, the developed adhesive/cohesive interaction is also stronger in case of such
bitumina than in case of bitumina with extended continuous liquid phases (perpetua phase) and such
bitumina seem to be well suited for an application as binder material. This was possible by employing
a new designed micro-direct tensile test for quantitative determination of adhesive forces including
the possibility to study the nature of the failure upon testing.
The obtained data were correlated with AFM data from surface structure analysis and verified by other
data from literature and other experiments regarding the adhesive interaction of parts of the bitumen
with solid surfaces
TNO Identifier
535427
Source
Construction and Building Materials, 117, pp. 1-7.
Pages
1-7
Files
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