New Products

New, safe injection-grouting resins

Legislation within the EU changes with great rapidity in many sectors. A recent innovation, for example, were the REACH regulations; this acronym stands for Registration, Evaluation, Authorisation and Restriction of CHemicals. Should a feed materials producer decide, for economic reasons, not to register a specific substance under REACH, it is possible that the marketing and use of that substance may be banned in future. It will also be necessary to apply special labelling to a number of products, indicating, for instance, „Hazardous“ or even ”Toxic“. Phthalate-based substances, for example,...

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Issue 04/2021

Combined Cement-Polyurethane Grouting Operations in Tunnel and Shaft Construction

Introduction Excavation of water-bearing formations in tunnelling and shaft construction can lead to short- or even long-term water and material ingress, with sometimes significant effects on...

Issue 05/2019

Rehabilitation of a Deteriorated Metro Line with Injection Technology

1 Compartment Barriers and Curtain Injections 1.1 Resins and Equipment ? Foam Seal is a dual component, quick reacting, slightly flexible silicate-based injection foam. It is used mostly for safe...

Issue 05/2009 Construction Equipment

Mixing and Grouting Systems for the Weinberg Tunnel in Zurich/CH

Mixing and grouting systems made by Häny are being used to construct the new Alstetten – Zurich Main Station - Oerlikon cross-city underground link in Switzerland. In contract section 3 (Weinberg...

Issue 04/2019 MC-Bauchemie/Porr Bau GmbH

New Cementless TBM Backfill Grout

In mechanised tunneling, concrete segments can be positioned to create the inner lining of the tunnel. The action of the tunnel boring machine is toleranced to create a clearance between the...

Issue 07/2010 New Products

New Tail Seal Grease for TBM

Condat started its lubricants activity for underground works in 1989 when it was awarded by international tender to supply the tail seal grease WR 89 for the Channel Tunnel. Since then, this product...