Materials

Crushing equipment from Metso is helping boost production and efficiency at the Barrasford Quarry in the UK. Run by Tarmac Quarry products, the operation is now using a Lokotrack LT140 track-mounted mobile crusher, a pair of Lokolink mobile conveyors and several field conveyors. The company is changing the operation from a static to a mobile crushing operation, and it says installing the Metso machinery has helped reduce manpower at the site. The crusher and the conveyors have replaced a pair of static c

Troxler Electronic Laboratories is celebrating 50 years of providing services to the highway industry. In this half-century, Troxler says it has been awarded over 100 patents by the US Patent Office for innovative products that have improved or created many of the new technologies used today in the construction industry. The company is originally known for its nuclear moisture density gauges, but it also provides non-nuclear electromagnetic density devices as well as Superpave gyratory compactors, asphalt i

Specialist equipment is available for carrying out a variety of important tests on asphalt It is important to know how asphalt will react to various conditions such as heat, cold and traffic loads when it is laid on roads. Project specifications will give detailed criteria of what is required, and companies will either ask outside laboratories to make sure the material meets the specs, or will often carry out such tests themselves with trained staff in an on-site laboratory. This will be equipped with the

Major Wire Industries’ (MWI) Flex-Mat 3 Double-Wire High-Performance, Self-Cleaning Screen Media is said to increase production when screening high-impact, heavy and abrasive aggregate on top decks. The side-by-side wire design of the Flex-Mat 3 Double-Wire is said by Canada-based MWI to add a slight spring to the wire that absorbs impact from heavy material or when the material is dropped from a longer distance. The new self-cleaning screen media system’s vibrating wire technology, combined with its side

The popularity of hydrodemolition is growing worldwide and was the specified solution for work on two vital Swedish links The hydrodemolition technique, which uses high pressure water jets to remove damaged concrete from various structures, is playing a crucial role in the major restoration of the vital Central Bridge and Söderled Tunnel in the centre of Sweden's capital Stockholm. The 1,550m dual two-lane rectangular box Söderled Tunnel and connecting dual two and three-lane Central Bridge are a vital 2.6k

Visualise today's concept of a major commercial traffic corridor in the western United States. A roadway responsible for delivering goods to Arizona, Nevada and Utah, that also connects Mexico to the United States to Canada through the North American Free Trade Agreement (NAFTA). What springs to mind? A multi-lane highway carrying thousands of vehicles a day past cities at speeds up to 113km/hour, while egress ramps make sure vehicles get safely to city streets and their final destination. This is not the c

An engineering "first" means that rehabilitation work on a vital Scottish bridge built over 40 years ago can be carried out smoothly A new report to the Forth Estuary Transport Authority (FETA) in Scotland recommends appointing Balfour Beatty Civil Engineering of Edinburgh as 'preferred bidder' to carry out the scheduled replacement of the bridge's main expansion joints in 2009. However, the report to the bridge authority says the tender price of £13.7 million (US$21.3 million) is some £5 million ($7.8 mill