Super performance of AMIR compactor in Australia
Construction-induced cracks have been analyzed and explained using the equation of relative rigidity. It has been shown that conventional rolling equipment are the main causes of the se cracks. The analytical results were validateded by laboratory simulation and field observations. These results led to the design and manufacture of a number of laboratory models and full-scale new compactors, called Asphalt Multi-Integrated Roller (AMIR). The AMIR' compactor has an infinite radius and a soft interface with the asphalt mix during compaction. An Australian company used AMIR and a combination of vibratory and pneumatic rollers, side by side, to compact a sand layer and two asphalt sections with two different mixes in Sydney. The Australian results, which showed super performance by AMIR, have verified the results of a number of Canadian field trials carried out in the 1990s. Consequently, the Australian company modified AMIR to enhance its mechanical features and developed an advanced compactor. This paper presents the Australian field trials, including field observations and the results of laboratory tests performed on cores and beams recovered from the field. A comparison between the main results of the Australian and Canadian field trials is also presented. The results of this paper confirm the superior performance of AMIR over conventional rollers, and therefore should be of interest to the pavement industry.
|Keywords||Asphalt, Compaction, Construction cracks, Density, Fatigue, Field, Laboratory|
|Conference||Canadian Society for Civil Engineering - 1998 Annual Conference|
Halim, A.O, & Easa, S.M. (Said M.). (1998). Super performance of AMIR compactor in Australia. In Proceedings, Annual Conference - Canadian Society for Civil Engineering (pp. 195–205).