Condat News Release
An eco-compatible, cost effective and performance improved new EPBM foaming agent is introduced to the international tunnelling industry by French chemical manufacturer Condat.
The new products are a technical evolution of the company's CLB F5 range of sustainable foaming agents and are designed to improve safe and efficient EPBM excavation under the severest of geological conditions. Central to the development is a reduction of costs by avoiding the need to use complementary polymer products as part of the process.

Condat's new range of EPBM foaming agents offer major improvements on previous products

Based on the latest innovations in chemistry the CLB F5™ range:
• Decreases the consumption of conditioning agents by 20%
• Produces optimum and stable foam no matter the quantity of air injected
• Allows generation of a stronger foam at lower concentrations
The product is also highly biodegradable, which not only reduces the risk of water and ground contamination at and around the tunnel face, but also provides a significant benefit when considering the increasingly sensitive issue of muck disposal. Development of the new range is designed to keep pace with ever more stringent regulations imposed internationally by the OECD.
The CLB F5 range, which is released to market on September 1, 2012, offers different product formulations to suit all types of ground including sand, clay, marl and gravels.
Condat started its lubricants activity for underground works in 1989 when it was awarded the contract to supply the tail seal grease (WR 89) for TBMs excavating the Channel Tunnel between England and France. Since then, this product and its more recent generations, have been used for some 4,000km of TBM excavations, often in the most extreme conditions. The company also manufactures the WR89 NewGeneration range of tail seal greases, grout additives, and main bearing seal products.
From its international headquarters in Chasse-sur-Rhône in southwest France, Condat employs a technical team of international specialists dedicated specifically to the use of its products on any type of TBM. The team becomes involved in new tunnelling projects from early in the bidding process, offering a service that carries out laboratory tests on ground samples to advise contractors and clients on the optimum soil conditioning solution for each different project.
New eco-friendly tail seal grease - TunnelTalk, October 2010

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