A Laboratory Study of asphalt mix improvement techniques and test
methods to asses Rutting potential
H.I. AI-Abdul Wahhab
ROAD & TRANSPORT RESEARCH Vol.3 No.4 December 1994
Recent constructed highway pavements, in the Kingdom of Saudi Arabia,
are experiencing premature high levels of wheel track rutting. Many factors
were thought to contribute to rutting, including high ambient pavement
temperatures, a high number of loaded trucks, high tire pressures, and
unfavorable mix properties. This paper outlines laboratory work conducted to
select aggregate gradation and treatment methods to improve local mixes
resistance to rutting. Two mixes were optimized for wearing course and base
course applications. Moreover, laboratory tests were evaluated for their
ability to predict rutting. Results indicated that mixes with different
gradations can be best ranked using the Hveem method.
However, if mixes have relatively similar gradations then a resilient modulus
has a better ability to rank mixes based on their rutting susceptibility.