In chambers: The new high density polyethylene Centurion Access System from the Cooper Clarke Group will be on show on Stand 938. Developed from the original Cooper Clarke access chambers, the new system is intended for use in all areas where draw pits are required. Applications include closed circuit television, telecommunications, information technology, water services and car park and pedestrian lighting. Cooper Clarke says the new chambers are specifically designed to ensure 450mm cover over ducting in footways and 750mm cover in carriageways. Significant cost savings over conventional chamber construction are claimed.
Firm footing: Visitors to Stand 117 will be able to inspect the new SmartFoot pre-cast foundation system being launched by specialist geotechnical contractor Van Elle (Holdings). Aimed at the fast track construction market, SmartFoot is claimed to be 'dramatically different from any other modular foundation system on the market today'. Van Elle says that the new system is the only precast foundation system that can be used with or without piles on good or bad ground alike. The SmartFoot secret is the use of Dyform tendons to post-tension the modular sections after installation, to combine the rigidity of an insitu foundation with the versatility and ease of installation of a modular sysem. Smartfoot foundations can be de-stressed and dismantled if required, making the system ideal for temporary structures, Van Elle claims.
Go with the flow: New below ground drainage systems from Ruberoid Building Products will be on show on Stand 208. Hydroflow WD100 and WD300 external wall drains and the Hydraway 2000 carriageway drainage system are the latest fruits of Ruberoid's declared intention of providing a full below- ground waterproofing system. Both Hydroflow systems combine a three-dimensional core with a non-woven geotextile to resist soil intrusion into the drainage channels. Hydroflow WD300 has an additional impermeable backplate and can be used to protect Ruberoid's Plasprufe tanking membranes. The fin drain Hydroway 2000 system is aimed at the drainage of sports grounds and the venting of landfill gas as well as the drainage of paved areas, Ruberoid says.
Strain reliever: On Stand 745 Akzo Nobel Geosynthetics will be launching the new TRC-Grid, a multifunctional product which combines the reinforcement properties of a high strength geogrid and the separation function of a geotextile.
The grid component is woven from the aramid fibre Twaron and embedded into a non-woven polyester textile to give reinforcement, separation and filtration in one product, Akzo Nobel says.
Claimed performance figures include a strain at working load of 1.5%, an ultimate strain of 3.5%, and equal tensile strength in both longitudinal and transverse directions. This is said to reduce differential settlement in roadbases by up to 50% compared to conventional solutions. TRC-Grid is available in three different grades, and Akzo Nobel says it has already been proven on several major contracts overseas.
Ground cover: Several new Tarmac products will be showcased on Stand 307, including the new Topaz flooring system. Topaz is designed to replace traditional built-up flooring - concrete slab, screed and finishing layer - with a single stable thin floor slab. Tarmac claims that Topaz will be extremely hard-wearing and that reduced installation times will produce significant cost savings. Similar benefits are claimed for new precast concrete tunnel sections, already specified for several UK rail projects.
Tarmac Quarry Products' Mastertint and Masterprint will also be on show. Mastertint uses a combination of clear binder and naturally coloured aggregates and pigments to produce 'truly distinctive' colours suitable for bus and cycle lanes, while Masterprint is an asphalt imprinting system which can replicate block paving and cobbles.
Picture probe: Any engineer concerned with locating pre-stressing tendons within concrete elements should benefit from a visit to Protovale on stand 750. Here visitors will find the latest development in Protovale's established range, the concrete borehole probe, which is specifically designed to locate tendons and deep layers of reinforcement.
Protovale says that no covermeter in the world, nor radar techniques, are capable of locationg tendons or deep reinforcement hidden behind the first two layers of steel. But if a clear area within the upper layers is located by conventional techniques, and a 20mm borehole drilled beyond them, then the new probe can be used to locate anything deeper.
The probe is connected to one of Protovale's standard covermeters and contains both side and forward scanning sensor coils. By rotating the probe, a reliable picture of the interior of the concrete member can be obtained, Protovale claims.