MICROTOP Spray Mortar TW NSM

Application

For the production of spray mortar using the wet spraying process, for the reprofiling and coating of surfaces as well as for increasing the concrete cover and finish in the drinking water sector. The materials can be easily rubbed, smoothed and small jobs can be carried out by hand in conjunction with an adhesive bridge.

Properties

• : microsilica-tempered
,
• low modulus of elasticity,
• low rebound
,
• low dust generation,
• water vapour diffusion, impermeable
• to water
,
• chloride-free
• , abrasive and smoothable,
• machine sprayable,

processing

• Substrate: The load-bearing concrete/old plaster (adhesive tensile strength at least ≥ 1.5 N/mm2) must always be blasted, preferably with HD water ≥ 1,000 bar. For a force-fit composite, the surface must be crack-free, even, free of loose and crumbly components and ultra-fine mortar enrichments, as well as rough and open-pored. Pre-wet the substrate thoroughly one day before processing.

• Processing: Mix MICROTOP TW NSM as a complete container with the prescribed amount of water for approx. 3 minutes. The application to the matt damp surface is carried out by dense phase conveying with a suitable screw pump (e.g. m-tec P 20 with rotor/stator D8/2), including propellant air for spraying.

The

air conditioning of the water chambers to prevent condensation must be ensured until the applied material has achieved sufficient mechanical strength. By using humidifiers, the relative humidity must be kept at 95% for at least 10 days after application. The heat input must not exceed 20 °C. Draughts and major air movements are to be avoided.

Delivery form

25 kg paper special packaging

Storage

Store in a dry place like cement. Shelf life approx. 12 months.

Quality: C30/37

Grain size: 0 - 3 mm

Colour: natural, white, blue

Temperature (processing, ambient and substrate temperature): ≥ 5 °C

Water / solids value: approx. 0.14 - 0.15

Water addition: approx. 3.6 l/25 kg Container

layer thickness (single layer): approx. 20 mm

DVGW worksheet (type class 1, W 300, W 347): yes