A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Deformation Performance of Foamed Bitumen Stabilised Pavements Under ALF Full-Scale Accelerated Loading
The majority of the Australian sealed road network consists of sprayed seal granular pavements. Increasing traffic loadings are placing more pressure on these pavements and there is increasing use of rehabilitation or strengthening treatments that enhance the existing material by the addition of cementitious and bituminous binders. This paper summarises the findings of an Austroads research project aiming to evaluate the deformation performance of foamed bitumen stabilised base materials. The project assessed a crushed rock and a 50% reclaimed asphalt pavement (RAP) blend under accelerated loading using the ARRB accelerated loading facility (ALF). Deformation performance was measured just after construction and sealing to assess the early life properties and after three months of curing. The deformation characteristics were measured with the test pavement heated to around 40 °C at mid-depth to simulate warm weather conditions. The main findings were: (i) The test pavement showed limited pavement surface deformation and low deformation rates under accelerated loading for both the early-life and cured conditions, (ii) when tested at the same temperature, the 50% RAP did not impact significantly on the performance of the pavement, (iii) the foamed bitumen stabilised pavements performed well compared with the asphalt control section. Overall, the research concluded good deformation performance of the foamed bitumen stabilised materials. Subsequent laboratory wheel-tracking tests performed at higher temperatures confirm the resilience of these materials in hot weather conditions.
Deformation Performance of Foamed Bitumen Stabilised Pavements Under ALF Full-Scale Accelerated Loading
The majority of the Australian sealed road network consists of sprayed seal granular pavements. Increasing traffic loadings are placing more pressure on these pavements and there is increasing use of rehabilitation or strengthening treatments that enhance the existing material by the addition of cementitious and bituminous binders. This paper summarises the findings of an Austroads research project aiming to evaluate the deformation performance of foamed bitumen stabilised base materials. The project assessed a crushed rock and a 50% reclaimed asphalt pavement (RAP) blend under accelerated loading using the ARRB accelerated loading facility (ALF). Deformation performance was measured just after construction and sealing to assess the early life properties and after three months of curing. The deformation characteristics were measured with the test pavement heated to around 40 °C at mid-depth to simulate warm weather conditions. The main findings were: (i) The test pavement showed limited pavement surface deformation and low deformation rates under accelerated loading for both the early-life and cured conditions, (ii) when tested at the same temperature, the 50% RAP did not impact significantly on the performance of the pavement, (iii) the foamed bitumen stabilised pavements performed well compared with the asphalt control section. Overall, the research concluded good deformation performance of the foamed bitumen stabilised materials. Subsequent laboratory wheel-tracking tests performed at higher temperatures confirm the resilience of these materials in hot weather conditions.
Deformation Performance of Foamed Bitumen Stabilised Pavements Under ALF Full-Scale Accelerated Loading
Lecture Notes in Civil Engineering
Chabot, Armelle (editor) / Hornych, Pierre (editor) / Harvey, John (editor) / Loria-Salazar, Luis Guillermo (editor) / Bodin, Didier (author) / Grenfell, James (author) / Jameson, Geoff (author)
Accelerated Pavement Testing to Transport Infrastructure Innovation ; Chapter: 31 ; 300-308
2020-08-26
9 pages
Article/Chapter (Book)
Electronic Resource
English
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