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@ARTICLE{Pipintakos:486075,
author = {Pipintakos, Georgios and Soenen, Hilde and Goderis, Bart
and Blom, Johan and Lu, Xiaohu},
title = {{C}rystallinity of {B}itumen via {WAXD} and {DSC} and {I}ts
{E}ffect on the {S}urface {M}icrostructure},
journal = {Crystals},
volume = {12},
number = {6},
issn = {2073-4352},
address = {Basel},
publisher = {MDPI},
reportid = {PUBDB-2022-07075},
pages = {755},
year = {2022},
abstract = {It is well documented that most bituminous binders contain
crystallisable material. This crystallisable fraction, often
referred to as paraffinic or natural wax, is associated with
the bitumen’s origin and has an influence on its
rheological performance. In the literature, Differential
Scanning Calorimetry (DSC) is the primary technique used to
determine the melting and crystallisation behaviour of this
waxy fraction. However, in bitumen, thermal transitions in
DSC are typically very broad and can be combined with
recrystallisation effects upon reheating. This work explores
the potential crystallisation and melting process of a waxy
and a wax-free bitumen via three different approaches: DSC,
Wide-Angle X-ray Diffraction (WAXD) and Confocal Laser
Scanning Microscopy (CLSM). The findings reveal that the DSC
transitions of the waxy bitumen are in good agreement with
the corresponding occurrence of WAXD signals and to some
extent with the formation and disappearance of the surface
microstructures which were followed at two cooling and
heating rates. WAXD results additionally demonstrate that
the crystalline material in bitumen is organised in an
orthorhombic unit cell, typical for straight chain aliphatic
structures. On the other hand, DSC and WAXD support the lack
of crystallinity for the wax-free bitumen which could
explain its featureless CLSM surface. Overall, the
originality of this work resides in the disclosure of
connections between crystallographic properties, thermal
transitions and the surface micromorphology of bitumen.},
cin = {EMBL-User},
ddc = {540},
cid = {I:(DE-H253)EMBL-User-20120814},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
experiment = {EXP:(DE-H253)D-D1.2-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000816648200001},
doi = {10.3390/cryst12060755},
url = {https://bib-pubdb1.desy.de/record/486075},
}