Moderation Effect of Raveling on Bleeding failure of Flexible Pavements

Document Type : Research Paper


1 Ph. D. Research Scholar, Osmania University, Heydarabad, India

2 Affliated to Osmania University, Hyderabad


This paper evaluates the moderation affect of raveling on bleeding failure of Flexible
Pavements with the support of moderation models. Failures in Flexible pavements results
due to its component layers which undergo distress due to innumerable causes. There are
different types of failures in Flexible pavements like alligator cracking, corrugations,
shoving, pot holes, rutting, raveling and bleeding. Determination of the type and extent of
failure and its reason is necessary to facilitate correction in mix design, construction and
maintenance for the road projects. A moderator is a qualitative or quantitative variable that
affects the direction and/or strength of the relation between an independent or predictor
variable and a dependent or criterion variable. Four road sections have been considered for
data collection and model validation. Linear models have been developed to check the
mediation and moderation affects of raveling on bleeding failure for both the roads and these
models are validated on other two road sections. The study accentuates that there is no
mediating affect of raveling on bleeding but it affects the bleeding moderately.