Highways

In recent years there has been a significant increase in the construction of concrete (rigid) pavements in NSW on both major highways and urban, municipal networks. Concrete roads have been constructed in configurations varying from two—lane carriageways to six-lane, dual-carriageway formations. Three major, heavily trafficked roads on which concrete pavements...

About 2700 delegates attended the five-day Congress which consisted of plenary sessions, committee reports and technical tours. The Association’s national infra— structure engineer attended the Congress to assess the relevance of new road technology for Australia. The Congress was organised by PIARC (a more detailed explanation of PIARC can be...

Signfcant changes in the costs and availability of key resources, which began to occur in the 1970s and are continuing in the 1980s, together with reassessments of the effects of traffic loads, particularly heavy traffic, are seeing reviews of the types of pavements and their design by road authorities in...

During 1990 large inland areas of Queensland and New South Wales were devastated by severe floods. Considerable media attention was devoted to the effect of these floods on people and their property. Evacuation, flood-relief oDerations and subseauent rehabilitation of towns damaged by the floods were widely reported. One element of...

The road transport system is a valuable and essential part of Australia’s infrastructure in which we all have an enormous stake. However, infrastructure is a long- term investment in the future and consequently receives little attention from the public unless something goes wrong or individually, we are affected by delays...

Construction of a major concrete road is nearing completion at South Melbourne, for the Country Roads Board, Victoria. The total area of pavement is nearly 70,000 square metres, equivalent to 19 lane Kilometer of roadway. The road forms the southern and northern approaches to the new bridge over the Yarra...

The Brisbane City Council operates a Pavement Management System for the identification of the pave- ment needs of the City’s 4400 km of roads. Roads with failed areas exceeding 20 per cent and in need of rehabilitation are identified by this system. One of the rehabilitation methods adopted for roads...

Until the last few years the main use of pavement rehabilitation by recycling the existing pavement by cement stabilisation had been in urban roads administered by Local Government. The existing pavement thicknesses and therefore the depths of pavement recycling in these applications are typically 150—200 mm. Using similar procedures the...

With an eye to future rehabilitation solutions, John Hodgkinson re-visited a CRCP overlay constructed on the Hume Highway, just north of Holbrook, in 1992. A significant milestone was reached in June 2021 as the first BCSA Rapid Set Concrete slab celebrated its 10th Birthday in Australia at Sydney International Airport. Since this...

Recent field observations on several newly constructed Continuously Reinforced Concrete Pavements (CRCP) in Belgium have indicated that the crack pattern is characterized as low mean crack spacing (approximately 1.0 m after 2 years in-service) along with a high percentage of clusters of closely spaced cracks. Besides, field surveys also indicate...

Concrete is used throughout the World every day in countless diverse applications but it is critically important in terms of performance and durability to understand why the mix design and placement need to be appropriately tailored to suit each application. The inimitable Geoff Ayton will explore what it takes to...

In addition to advances in materials and construction equipment there is a continuing need to ensure adequate skills are available within paving crews. Since 2006 concrete pavement crews and their supervisors in Australia have been required to undertake a mandatory one-day course. Known in industry as the “Grey Card” course...