Bonded concrete overlays on asphalt (BCOA), historically known as whitetoppings, are growing in popularity as an option for rehabilitating distressed asphalt pavements. Despite their application over the past several decades, the existence of performance models for this type of pavement are rare. It was the objective of this study to...
Use of Fast Set Concrete For Concrete Pavement Maintenance Work
The advent of the new generation of volumetric concrete mixers in conjunction with the availability of calcium sulfoaluminate cements has transformed concrete pavement maintenance practice around the world and especially in the United States, Canada and South Africa and in NSW where there is a history of 8 years’ experience...
Recent Advances and Uses of Roller Compacted Concrete for Pavement Construction in the United States
Roller Compacted Concrete (RCC) is a no slump concrete that is placed by an asphalt paver and compacted with vibratory rollers similar to asphalt pavement construction. RCC has long history of good performance as a pavement for ports, container yards, and manufacturing plants. This paper will summarize a recent survey...
Major Concrete Pavement Rehabilitation by Rapid Slab Replacement. Pacific Motorway Queensland
Rehabilitation of concrete road pavements by rapid slab replacement in single shifts has been established in Australia for ten years. Until recently it has been used for spot replacement of slabs in both road and airport applications. In South East Queensland in 2013, a program over a series of 22...
Developments in Rapid Set Lean Concrete Subbase
The technology and practice for single shift high strength concrete base replacement, mainly at night, using rapid set concrete has been established in Australia for ten years. Since 2017 this technology has now been adapted and extended to developing a rapid set lean concrete and related registered mixes. This has...
Characterization of joint sealants through an innovative test procedure
Joint sealants are indispensable components of Jointed Plain Concrete Pavements (JPCP), the standard construction method in Germany. The joint filling system is subjected to various loads during their service life, which in practice lead to a regular renewal of the sealing after about 7 -10 years. Nevertheless, it must be...
Use of glass fibre reinforced polymer bars in concrete pavements
The use of glass fibre reinforced polymer (GFRP) bars as an alternative to steel reinforcement has considerably increased over the past decade. Design-related information is now available and can be adapted into the Australian design and construction practice. The results of technological research and field implementation in concrete pavements carried...
Intricacies Surrounding the Machine Placement of Concrete Pavements in Tunnels: Current state of Practice.
Transport tunnels built in Australia within the past 25 years have typically been designed and constructed consecutively. However, in recent years Australia (and Sydney in particular) is witnessing these projects being delivered concurrently, which are in turn diluting the skills pool across all facets of the industry. Sydney is currently...
Concrete Highway Pavement Load Capacity for Possible Future Increases in Permissible Axle Loads
From time to time there is discussion within Government and industry about measures to improve freight transport efficiency. These discussions often include increasing permissible axle loads. If this was to happen it may also be limited to major road transport corridors. This paper neither supports nor sets out a case...
Overview of light rail track slab design
Recently Aurecon have developed the design on several urban light rail projects, with a notable example being that recently opened in Newcastle. With several projects currently in development and tender phases, and the likelihood of further stages of light rail expansion, it is important to understand the options available for...
A Fresh Look at Pavement Life Costs
Whole of life cycle costing of pavements has not been revisited for nearly 27 years since 1990 by the Bureau of Transport Economics (now BITRE). Previously, asphalt pavements were considered to have a lower cost of construction but required regular maintenance (every 5 to 10 years) whereas concrete pavements are...
The important role materials play in concrete pavement design, performance, and service life
The materials that make up concrete have a direct influence on the decisions made during pavement design and construction, as well as the performance of the pavement in service. What happens when material performance varies from what was considered at design stage? What if we need to change construction methods...