Shotcrete Dry

• Used as filler material in bearing constructions
• Well-suited for shotcreating of up to 80 mm in one work process
• Contains dust-bonding additive
• Comes with and without fibre
• Requires only the addition of water

Marlon Shotcrete Dry is used for different tasks such as reinforcement of bearing concrete constructions on bridges, beams, slabs and columns and for renovation and repair of balconies, facades or areas and constructions that are difficult to access, where traditional concreting work is not practical. Marlon Shotcrete can be made to order based on grain size, fibre and even colour.

The surface must be well-suited and washed clean of any oil, grease, cement dust and other loose particles through chipping, sandblasting or the like. Reinforced iron, if any, must be cleaned of rust and chlorides. Reinforced iron must be fixed and unable to vibrate. The surface must be watered down and rendered slightly absorbent or coated in a suitable, approved material that will ensure the best possible adhesion. Marlon recommends having the surface approved by a consultant or inspector before spraying begins.

The dry product is poured into a container that is connected to a concrete pump, which feeds the material to the spray head, where the correct volume of water and any accelerators or retarders are added.

It is important to add the proper amount of water, so the mixture has the right consistency – neither too thin nor too dry - upon spraying. Otherwise, this could lead to poor compression, which will reduce the strength and adhesion. There is also a risk of poor envelopment of reinforced iron, “nests” and large recessions that need getting rid of.

The spraying normally takes place from bottom to top, while the nozzle is moved perpendicular on the surface. With reinforcement, however, the nozzle is slanted to ensure that the armouring is encased optimally.

To achieve the best results when using injection concrete, it is important to:

• use specially trained staff
• use machines and equipment that are in good working condition.
• use good and suitable materials.

Generally, Shotcrete 0-2 is applied in 10 mm thickness, 0-4 in 50 mm thickness and 0-8 in up to 80 mm.