NEW structural repair concrete from Weber

webercem spray DSF is a polymer-modified structural repair concrete specially designed for fast and efficient dry process spray application. Its formulation achieves higher tensile and flexural strengths, increased resistance to impact and abrasion, reduced rebound and minimises application thickness. Recommended for use in thin sections of 25 - 50mm on columns, beams and soffits, webercem spray DSF can be applied up to a thickness of 300mm in just one pass.

"The major advantage with this product is that the added fibre reinforcement reduces shrinkage with improved crack control, better strain relief and stress distribution," says Tracey Dempster, Head of Marketing, Saint-Gobain Weber. "We have introduced this technical product in direct response to demand from the industry and we are delighted with the results of our in-house tests and site trials."

Pre-bagged and ready to use webercem spray DSF conforms to BS EN 1504-3 meeting the challenging requirements of a Class R4 repair product and is designed for remedial work and repairs. Compliant with Highways Agency specifications it is fully suited to the repair of highway structures such as bridge columns, beams, abutments, tunnels and viaducts. On marine structures it is ideal for piers, quays, seawalls and docks, as well as repairs to fire damaged concrete. webercem spray DSF provides structural enhancements to mineshafts and structural encasement of steel sections.

Applied directly into a hopper or dry process spraying machine, water is added at the spraying nozzle which is controlled by an experienced contractor to achieve high-build. All treatable surfaces, including concrete and steel substrates, must be appropriately prepared prior to application. Initial set can be achieved in 2 - 3 hours. webercem spray DSF achieves a compressive strength in excess of 45 MPa and adhesive bond in excess of 2.0 MPa when tested to BS EN 1504-3 requirements.