2021 A Subbase Odyssey

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The subbase layer has a critical role in the design of concrete pavements. Australia is unique in its routine application of a lean mix concrete subbase layer to much of the heavy-duty concrete pavement highway network, the result of which is a reluctance to adopt any alternative (“why fix what...

Specifying Concrete Pavement for Local Government

Highways Members Only

This presentation will provide an overview of the AUS-SPEC information, tools, technical specification templates, specifications framework and processes to document requirements for various asset life cycle activities. It will also demonstrate the use of the system to create contract documentation for the design, construction, and maintenance of local government infrastructure...

32mm Aggregate Trial at Oxley to Kundabung Pacific Highway Upgrade

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This paper focuses on the analysis of pavement sensor data collected from the 32mm aggregate trial at Oxley to Kundabung Pacific Highway Upgrade project. This trial was intended to establish the concrete mix design parameters, verify the paving ability of the mix and to observe the environmental loading behaviour of...

Evaluation Of Long-Life Rigid Pavements In Michigan

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Presentation only

Investigation of Crack Width Development in CRCP

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The traffic volume on German motorways increased steadily and this trend is expected to continue in the future. To guarantee mobility in the future and reduce the national economic consequential costs, road construction with a maximum service life and a minimum of necessary maintenance are needed. Rigid road pavements with...

Review of the Erosion Criteria for Bound Subbases in the Australian Rigid Pavement Design Procedure

Highways Members Only

The current Australian rigid road pavement design procedure considers both structural concrete slab fatigue and subbase erosion. The erosion component was introduced in the 1992 edition of the Austroads pavement design guide as nomographs and incorporated as algorithms in the 2004 edition of the guide. The erosion distress criteria were...

CRCP for Rural and Urban Applications

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Presentation only

The First Concrete Freeway in South Africa

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The first concrete freeway in South Africa was constructed between 1970 and 1971. It consisted of a dual carriageway, two-lane freeway with plain/jointed concrete pavement (PCP) for the traffic lanes and asphalt for the two shoulders. Three years after opening wider than normal hairline cracking was observed close to the...

Enhanced performance of concrete with use of Carbon Nanotube enriched liquid additive

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The Carbon nanotubes (CNTs) in a liquid additive when used in the design and construction of concrete, serve as nucleation sites during cement hydration to help create a denser, cement paste composition. The result is improved durability and strength. CNT technology remains ‘young’ within Australia; various laboratory and field trials...

W2B Recycled Crushed Glass Project

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Presentation only

Effects of Vibration on Concrete Mixtures

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Presentation only