Title: Maximising asphalt pavement life by mix design
Abstract: There appears to be scope for increasing rutting life and cracking life of an asphalt pavement by paying particular attention to the plastic, as well as the elastic, behaviour of asphaltic concrete mixes and to their relationships with the subbase and subgrade of the road. The authors have selected section 2 from the New South Wales department of main roads rooty hill field trial site to demonstrate theoretically how both rutting and fatigue cracking life can be greatly extended by adjusting the elastic and plastic properties of the 200 mm thick asphaltic concrete pavement. Instead of formulating different mixes the properties were varied by altering, in simulation, the temperature of the asphaltic concrete. For the particular pavement investigated it would appear that a considerable increase in fatigue cracking life would have resulted if the pavement had been constructed with a very stiff, near elastic, asphalt layer at the top grading down to a very soft elasto plastic layer at the bottom (a).
Publication Year: 1988
Publication Date: 1988-01-01
Language: en
Type: article
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