Overlays

With residential construction on the rise again, both homeowners and developers are seeking greater variety in pavement materials other than that provided by plain concrete or asphalt. To meet this demand, several Australian companies are producing patterned an4 col our ed concrete surface finishes to enhance paved areas in new...

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...

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Outline 2020 tested our flexural capacity and at times strained our mental tensile strength to 85% yield. To maintain tradition, ASCP has worked hard to develop a unique line-up of papers and delivery format for its 6th Concrete Pavements Conference which was delivered in August 2021. Like previous biennial conferences,...

Outline 2020 tested our flexural capacity and at times strained our mental tensile strength to 85% yield. To maintain tradition, ASCP has worked hard to develop a unique line-up of papers and delivery format for its 6th Concrete Pavements Conference which was delivered in August 2021. Like previous biennial conferences,...

Heavy vehicles traffic flow and loads are increasing every year and influence faster degradation of asphalt pavement. A lot of money is expended on distressed pavement repair and rehabilitation, so sustainable pavement structure development is one of priority in Lithuania. Flexible (asphalt) pavement design lifetime is 20 years and often...

For concrete pavements the new “thin upper layer concrete“ construction method, potentially in connection with the method of “thick concrete pavement“ placed on an unbound roadbase enables a 40mm thick upper layer concrete having a maximum aggregate size of only 8mm to be placed instead of a 70mm thick upper...

How do you undertake the repair of a jointed concrete carriageway on one of the busiest motorways in Europe, particularly when a large proportion of the joints have failed and the slabs are floating on a sea of Gault Clay. With differential settlements so severe that there was genuine concern...

The effectiveness of thin bonded overlays depends upon the adhesion level at the interface with the existing concrete pavement. It appears that shrinkage, particularly at the very early ages (18-24 hours), is mainly responsible for delamination, i.e. separation between old pavement and overlay. The present paper discusses the results of...

Ultra-thin whitetopping (UTW) is one of the newest and most innovative applications of portland cement concrete. The technique entails bonding a relatively thin layer of concrete onto an existing asphalt pavement. This technique was conceived in the United States of America and the first experimental project was built in Louisville,...

Since 1970, several highways in South Africa were cujistructed in Portland cement concrete, the only design being used was the jointed unreinforced concrete pavements. Due to early deterioration as a result of alkali aggregate reaction, one section had to be overlayed In order to determine the last option, several experimental...

Field tests have been carried out with thin, high strength concrete overlays (whitetoppings) placed on top of the milled asphalt pavement The aim is to find methods to restore rutted asphalt pavements and iliclease their rutting resistance. The whitetopping was limited to 70 mm. Both plain and steel fibre reinforced...