Facta universitatis - series: Architecture and Civil Engineering 2011 Volume 9, Issue 3, Pages: 407-417
https://doi.org/10.2298/FUACE1103407M
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Rutting mechanisms and advanced laboratory testing of asphalt mixtures resistance against permanent deformation
Miljković Miomir (The Faculty of Architecture and Civil Engineering, Nis)
Radenberg Martin (The Faculty of Architecture and Civil Engineering, Nis)
Permanent deformation in asphalt layers which manifestation on pavement
surface is named rutting represents one of the most significant distresses of
asphalt pavements. Depending on the level, it can be a huge inconvenience for
traffic safety, driving comfort, and overall pavement life-cycle. Rutting may
be classified into three basic types: one-dimensional or vertical compaction,
lateral flow or plastic movement, and mechanical deformation. As an addition
to Superpave® mixture volumetric design three, so called, simple performance
tests (SPT) were recommended. Each of these tests in conduced in uniaxial or
triaxial compression of cylindrical specimens. They cover the determination
of dynamic modulus, repeated load permanent deformation test (flow number),
and static load permanent deformation test (flow time). These tests provide
relatively good insight in on-site mixture performance. An application of
these tests provides a potential link between mixture design and structural
analysis that was an underlying goal of substantial amount of earlier
flexible pavement researches.
Keywords: asphalt mixtures, rutting, permanent deformation, fundamental characteristics, dynamic modulus, repeated load, flow number, static load, flow time