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...
Grated Drain by the Slip Form Method
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...
Local Government Path Paving by the Slip Form Method
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...
CSA Concrete Road Slab Replacements A Review of International Practice and Literature
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...
Comparison of PCC Elastic Modulus for Rigid Pavements Laboratory versus Field
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...
The First Concrete Freeway in South Africa
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...
Review of the Erosion Criteria for Bound Subbases in the Australian Rigid Pavement Design Procedure
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...