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...
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...
Low Noise Diamond Grinding Pacific Highway Trial
A Low Noise Diamond Grinding (LNDG) Trial was conducted across three sites on the Pacific Highway Upgrade, Nambucca Heads to Urunga section. This presentation outline the basics around LNDG, criteria for the trial, environmental considerations, analysis of results of the trial, summary of the outcomes, considerations and recommendations for future...
How Runway Pavement Value Choices are Influenced by Construction Costs, Loading, Subgrade and Operational Considerations
In Australia, most runway pavements are constructed from asphalt, however the reverse is markedly true for the USA. Melbourne’s Essendon runway was originally concrete but was overlaid with thick asphalt many years ago. Asphalt runways at Melbourne’s Tullamarine and Amberley have some sections of concrete. This paper explores the determination...
Features, benefits and challenges of air entrained pavement concrete mixes using fly ash (ASCP 5th Conference)
The benefits of replacing a proportion of cement with fly ash in concrete mixes have been well understood for many years, particularly in the mitigation of alkali silica reactions. In pavement concrete mixes, however, the properties of fly ash can often play havoc in controlling the amount of air in...
The Case For Lower Strength Gain and Early Age Acceptance of Concrete for Road Pavements
The objective of this paper is to encourage informed discussion among concrete pavement engineers. In New South Wales there is a substantial length of contemporary concrete highway construction. A very large inventory of concrete strength results is available. These have shown that construction specification requirements are being significantly exceeded in...
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...
Key Performance Requirements for Long Lasting Airport Concrete Pavements
This presentation by GOMACO takes wide ranging review of construction and whole-of-life review of the performance of airfield pavements, including: Actual Airport Facts and Trends Airport Design Advantages Various Adopted Paving Methodologies and Technical Features Key Performance Requirements for Long-Lasting Airport Concrete Pavements GOMACO’s Worldwide Airport References Conclusions
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...