Concrete milling, paving & compaction

Naue Geosynthetics says its Secugrid offers a solution for a host of ground preparation problems, and for use in reinforced retaining walls. Secugrid is a geogrid made from extruded monolithic flat bars with welded junctions, for soil reinforcement in earth, landfill and road construction as well as in hydraulic engineering applications. Among its benefits are said to be its high strength and low elongation thanks to the extruded elements. "The monolithic flat bars give it a robust construction, an

Colbond, a leading producer of synthetic nonwovens and polymeric mats and composites, has appointed Jan Mahy as global director of research and development. He brings with him 18 years of professional experience and moves from Akzo Nobel, a former parent company of Colbond. "I am looking forward to join Colbond's vision to strengthen the company's postition as an innovative global player in technical textiles. Leading an international group of experts to develop and improve products for this industry

Demand for geosynthetics in the United States alone is projected to increase 4.4% per year through to 2010 to more than 727 million m². Geosynthetics, used worldwide in the highway sector for strengthening, include geotextiles, geomembranes, geonets, geogrids, geosynthetic clay liners, preformed geocomposites, geocells and geofoams. The US advances will be fuelled by a recovery in nonbuilding construction. Additionally, geosynthetics will continue to increase their use in a wider range of applications

Hy-Ten's new positional couplers are said to speed up site construction times by using reverse cut threads to link together both reinforcement bars by turning the sleeve in one direction. Richard Webster, director at Hy-Ten, said: "We launched our standard range of friction welded couplers just 12 months ago and the concept has been enthusiastically accepted by both engineers and contractors. The new positional couplers extend the application of this concept into areas where reinforcement bars are immovabl

According to E-Z Drill, its Model 210 drill attachment series offers versatility and performance.The three model series is compatible with most model of backhoes and excavators and the pneumatic drills offer specially-designed features for maximum productivity and reduced maintenance. The units are capable of drilling 15.9-63.5mm holes, at a depth of 457mm.

The 5700C-Max unit from Power Curbers has now been used on a tricky shoulder widening job in New South Wales, Australia. The machine carried out the job close to Robertson in the Southern Highlands, about 1.5 hours drive to the south of Sydney. The job required the construction of a 200m long section of barrier, built to the requirements of the Roads and Traffic Authority (RTA). The contractor hand-formed the concrete shoulder as it was about 3m wide at the start and narrowed down to 1m at the end.

MINNESOTA CITIES including Minneapolis and Richfield have been testing pervious concrete on parking lots and other hard surfaces to improve storm water management. In Shoreview MN, the authorities went a stage further by opting to replace a storm drainage system with pervious concrete.

German firm Wirtgen is to begin marketing its concrete slipforming machines in the US, through its Wirtgen America operation. The move comes with the launch two new concrete slipformers developed just for the US market, the SP15 and SP25.