Asphalt milling, paving & compaction

Roads in the US keep failing so the Federal Highways Authority is proposing a new approach to mix design, but what does this mean for tests and testing? - Kristina Smith reports How do you test an asphalt mix for rutting? In the US, the answer could be any one of several tests, depending on which State you are in: Asphalt Pavement Analyser, Flow Number, Hamburg Wheel Tracking Test, Superpave Shear Test or Triaxial Stress Sweep Test. But that could all change. The Federal Highways Agency (FHWA), part of

Sumitomo is offering a series of special pavers, in addition to its conventional units. The modified machines are aimed at a range of specific applications and are based on the standard models. The HTP60W is a tack coat paver based on the standard HA60W model. The machine has the firm’s J- Screed with electric heating as standard and allowing hydraulic extension from 2.3-6m, while compaction is by tamper and vibration. The spraybars allow tack coats to be applied to the full paving width.

A highway widening project in the US state of New Hampshire is being assisted by the use of a gravity-fed asphalt paver. The widening work is being carried out as part of an upgrade for a 32km stretch of I-93, which was started eight years ago. The work is being carried out for the New Hampshire Department of Transportation (NHDOT) on a section of the highway between Exits 1 and 5 from the Massachusetts Stateline to Manchester, NH. According to NHDOT, the project involves widening I-93 from two lanes in

A highway widening project in the US state of New Hampshire is being assisted by the use of a gravity-fed asphalt paver. The widening work is being carried out as part of an upgrade for a 32km stretch of I-93, which was started eight years ago. The work is being carried out for the New Hampshire Department of Transportation (NHDOT) on a section of the highway between Exits 1 and 5 from the Massachusetts Stateline to Manchester, NH. According to NHDOT, the project involves widening I-93 from two lanes in

Geveko Markings says that it’s preformed thermoplastic called ChipFill can be used for repairing cracks and smaller holes in surfaces other than asphalt Repairs made with ChipFill can be done in only 20 minutes without the need for bulky machinery, according to the company. All that is needed is a brush and a gas burner. Until now, ChipFill has been used widely for road repair, but it offers easy solutions for other problems as well, such as reseating cobblestones. Thermoplastic and preformed thermoplas

Dynapac is now part of the Fayat Group and is a new sibling for fellow road machinery firm BOMAG - Mike Woof writes. The purchase of Dynapac from its previous owner, Atlas Copco, by the Fayat Group did generate some comment in the construction machinery sector. Dynapac, a long-standing player in the road machinery segment, is a rival to a firm that is already a key component in the Fayat Group, BOMAG. Both BOMAG and Dynapac make ranges of soil compactors, asphalt compactors, asphalt pavers and milling m

A new online concrete pavement design tool has been launched in the US by three major cement and concrete organisations. PavementDesigner.org – available free of charge - was created for city, county, and consultant engineers as well as academics and anyone involved in design of roadway, industrial, and parking area pavements. PavementDesigner improves upon traditional pavement design software programs, according to its creators. The platform is being offered completely free of charge by the American

Bomag is now fitting its compact roller in the 3-5tonne class with dual amplitudes.

Intelligent Compaction Measurement Values – ICMV – can be difficult to understand. What’s more, there is a lack of systematic and comprehensive documents explaining ICMV. For these reasons, the Federal Highway Administration (FHWA) and pavement engineering firm Transtec Group have released a technical brief to demystify ICMV. ICMV is a generic term for advanced measurement systems instrumented on vibratory rollers as a key components of intelligent compaction (IC) systems. It is based on the acceleration

Finland’s main international airport, serving the capital Helsinki, is now benefiting from a runway resurfacing project. The rehabilitation work has been needed for one of the airport’s three runways due to a number of age-related defects. Helsinki Airport processes some 17 million passengers/year and due to a combination of the often severe winter weather and the heavy aircraft traffic, the runway condition was not of the standard required. Resurfacing work was scheduled by FINAVIA, with a budget of some