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The First Concrete Freeway in South Africa

Highways Members Only

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

Highways Members Only

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

Highways Members Only

Presentation only

Effects of Vibration on Concrete Mixtures

Highways Members Only

Presentation only

Comparison of PCC Elastic Modulus for Rigid Pavements – Laboratory versus Field

Highways Members Only

Deflections measured using Falling Weight Deflectometer (FWD) device are used to backcalculate the elastic modulus (Epcc) of the concrete slab of a jointed Plain Concrete Pavement (PCP). The two procedures used to estimate the Epcc of the PCP slab from the deflection basins include the AREA method and the Best-Fit...

CSA Concrete Road Slab Replacements A Review of International Practice and Literature

Highways Members Only

Calcium sulfoaluminate (CSA) cements present an opportunity to improve upon a number of the shortcomings of ordinary Portland cement (OPC). The fast setting and rapid strength gain characteristics of CSA cements have led to a worldwide uptake in the operational maintenance area. The use in road and airfield pavements is...

Local Government Path Paving by the Slip Form Method

Highways Members Only

Concrete path paving for pedestrian commuting is visibly abundant in all towns and cities especially in the newly establish residential estates across Western Sydney. Primarily the norm is to have the path paving completed by the conventional hand place methods under local government supervision. This paper will outline the trials...

Grated Drain by the Slip Form Method

Highways Members Only

Over the past 12 years JK Williams Contracting Pty Ltd (JKW) have been slip forming kerbs and guttering, F type barriers, CRCP and residential concrete path paving across Greater Sydney developments. Over the period, we became very aware of a demand for lengthy ‘ACO’ style grated drains, something which emerged...

W2B in the Rear View Mirror

Highways Members Only

Presentation only

Impact of GGBFS Cement on the Interfacial Transition Zone and Influences on Flexural Strength of CRCP Concrete

Highways Members Only

With an increased focus on sustainability of concrete in commercial and infrastructure projects, the use of alternative cementitious sources is increasing. At the same time the availability of flyash in Eastern Australia is becoming less certain and secure in terms of both quality and future quantity. Transport for NSW specification...

A Review of International Practices for Design of Rigid Pavements for International Container Terminals

Intermodals/Ports Members Only

Whilst the practice of pavement thickness design for heavy duty rigid pavements, such as highways, is well established in Europe, the USA and Australia, agreed methodologies for the thickness design of extremely heavy-duty pavements such as those in intermodal container terminals/ports (ICT) is not commonplace. ICT facilities present a number...