Polymetric binders for tunnel walls - new standards in infrastructure projects

In summer 2008 researchers working for Wacker developed a novel product, polymer-modified sprayed concrete for application in infrastructure projects. They tested the product in their salt mine in Stetten, Germany during construction of new tunnel on the site. The builders had to penetrate the impermeable layers above and below the rock where they came across groundwater. Usually concrete is sprayed onto the exposed rock very soon after blasting. Because fresh concrete is very fragile and would not stick to the walls, the novel polymer-modified sprayed concrete came into play. The new polymer-enhanced sprayed concrete stabilised the tunnel walls and seemed to be a promising solution to impregnate the tunnel and provide a barrier against water seepage. One advantage of the product include the need for less accelerator to make the concrete set and harden; another advantage is that the modified sprayed concrete is softer and there is significantly less rebound, so far less concrete falls off the wall. These advantages result in shorter construction times and less waste, leading to significant reduced costs.

  • Availability:
  • Authors:
    • BONIN, K
  • Publication Date: 2009-6


  • English

Media Info

  • Pagination: 20-21
  • Serial:
    • Volume: 43
    • Issue Number: 5
    • ISSN: 0010-5317

Subject/Index Terms

Filing Info

  • Accession Number: 01141137
  • Record Type: Publication
  • Source Agency: TRL
  • Files: ITRD
  • Created Date: Sep 30 2009 9:05AM