Features

Hyper-mobility is constantly demanded by customers who favour continuous plants, especially in France. However, compromises must always be sought in the high output equipment range, says Ermont (part of the FAYAT Group), and major progress has been made in the parallel flow field with the 500tonne/hr and 600tonne/hr TSM plants, whereas the Rétroflux type of the counterflow plants have lagged somewhat behind. This gap has now been closed with the development of the hyper-mobile RF 400, capable of producing 4

Hot-mix asphalt (HMA) is produced at specialised facilities where various mixtures of aggregate are heated and dried, combined with liquid asphalt cement (also known as bitumen), and either stored in insulated silos or loaded into trucks and transported to a job site. Aggregate heating and drying is accomplished with various types of dryers, depending on whether a batch or continuous process is used. The continuous mix process uses aggregate drum dryers, designed to heat and dry measured quantities of grave

Mike Woof discusses some novel developments relating to bitumen In the developed countries of Western Europe there is an increasing shift away from new highway construction to maintaining and rebuilding existing roads. In Germany alone, a network of asphalt roads extending more than 600,000km will have to be maintained or repaired. Highway maintenance techniques do vary between European countries but some commonalities exist. There are techniques that have been sidelined in the last few years but which now

Milling techniques remain one of the most widely used recycling methods Well-proven, cold milling techniques remain one of the most widely used methods for materials recycling in road construction. Milled road materials can be cleaned up and re-used in both asphalt and concrete highway construction. German firm Wirtgen has long dominated the market for road milling machines and has the largest share of the sector (as well as the broadest product range), although other firms based in Europe and the US are be

Articulated dumptrucks are highly versatile and new developments continue to extend productivity The ADT market has been one of the fastest growing product areas in recent years. In the past ADTs were niche products that sold particularly well in Northern Europe (and Scandinavia and the UK in particular) as well as South Africa for many years, but these have now become popular worldwide. The number of manufacturers in the market has grown too. Just 10-15 years ago the only serious ADT manufacturers building

Highway safety could yet improve using available technology more widely Safety barriers still offer huge opportunities to improve accident statistics worldwide. There is a wide array of products on the market to suit all types of installation and with a diverse range of solutions for each application. Highway authorities have been installing barriers for many years now and the technology continues to improve, however an analysis of accident statistics shows that barriers offer further potential. Details fr

The Eurasphalt & Eurobitume 2012 event in Turkey has attracted record attendance figures - Mike Woof reports A strong focus on sustainability has been the focus for the 5th Eurasphalt & Eurobitume Congress held in June 2012 at Turkey’s Istanbul Lutfi Kirdar Congress Centre. The conference had as its theme: Asphalt, the sustainable road to success and attracted the highest ever number of attendees for this four yearly event. In one of the opening presentations Turkey’s transport minister, Binali Yildirim, sp

Ian Fraser, Tensar International’s director of application technology, looks at the latest lessons learned from the flood-hit Workington Bridge project in Cumbria, North West England. Rarely has a disaster like the Cumbrian floods demonstrated with more clarity the benefit of designing working platforms and bridge abutments to tested performance standards, as opposed to slavishly following accepted, but often much less efficient, design norms.

Characteristics of traffic speed and flow in managed freeways - *Dr Adrian Withill. In order to maximise the benefits of existing infrastructure, in terms of reduced delays and increased safety, many governments have recently been introducing projects that measure traffic speed and flow and automatically introduce advisory or mandatory speed limits. Such schemes tend to offer relatively quick wins at relatively lower capital costs than traditional highway construction. In light of the current world economy,

New developments in the software sector will improve construction efficiency. Standards organisation BSI is working with government, industry bodies, and private construction practices to create best practice standards for implementing Building Information Modelling (BIM). In 2011 the UK Government announced that all suppliers that wish to bid for public sector construction contracts must use BIM tools and techniques from 2016, making its implementation commercially critical for companies that wish to apply

India’s new Formula 1 motor racing circuit, with its tight construction tolerances, demands considerable driving skill. More than 500 million people worldwide watched the first Formula 1 motor race in India's history. The drivers were thrilled by the new asphalt circuit with its numerous bends and the peripheral area around the new race track at Greater Noida near the capital New Delhi, which were built by machinery from German company Vögele (a member of the Wirtgen Group). Working with four Super 1800-

New initiatives could boost transport sustainability – David Crawford writes. New roles are opening up for urban traffic management systems in helping city authorities to meet increasingly stringent governmental and supra-governmental air quality standards. European local authorities are typically tasked with both traffic management and pollution monitoring within their areas, making them well placed to draw on the latter to mitigate the impacts of the former.

We meet with Dr. Essam Sharaf, the former Prime Minister of Egypt, who has been honoured as IRF Personality of the Year for 2011 On 28 March, at a moving ceremony packed with IRF friends and delegates from all over the world, the IRF Personality of the Year Award for 2011 was formally presented to Dr. Essam Abdel-Aziz Sharaf. Discerned annually since 1951, the Award honours individuals universally acknowledged as having made particularly inspirational contributions to the fields of road infrastructure and