Flexural Behavior Compared with Marshall Stability of Asphalt Paving Mixtures

Noori Sadiq Ali

College of Engineering, Salahaddin University

The flexural failure strength of asphalt mixtures was investigated as a first local trial study
to compare and construct relationships with corresponding Marshall stability ' The type and
grading of aggregate were taken. into consideration '
The results include Marshall stability - flexural load relationship ; flexural load variation with
asphalt contents; Marshall stability quotients (Marshall stability / flow )-comparison with
flexural load quotients ( flexuraf llad / deflection ) with variation of asphait contents and
constructing thlir relationships ; and variation of flexural strength (modulus of rupture ) with
asphalt contents .
The results showed that there is second degree polynomial relationship between Marshall
stability and flexural load on one hand anibetween Marshall stability and flexural load
quotients on the other hand . Significant differences resulted between Marshall stability and
flexural loads and between their load quotients for each asphalt content . The type and grading
of aggregate affect flexural stiffness with asphalt contents '

Keywords :- Stiffness of asphalt. Flexural strength of asphalt


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