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Preparing the underlying surface
Prepare the surface according to state-of-the-art resin floor requirements: carefully examine the subfloor to make sure it makes up a suitable and structurally sound base.
This kind of floor must be laid only on surfaces showing compression resistance no lower than 25 MPa and stripping resistance no lower than 2 MPa.
Sand and concrete footings are not the best choice of underlayment: the required performance can however be easily achieved with special sand/concrete precast footings like NORD RESINE SC-1, or alternatively highly select inert material mixed with SC 1-BASE.
We recommend in any case adding FIBRE PE by NORD RESINE to the mix for improved performance.
The footing must be left to set for a suitable length of time (at least 28 days); max residual humidity must be lower than 4% (carbide measurement); if necessary, you can increase the resistance of a sand and porous concrete footing by deep impregnation with NORPHEN SW SOLID (diluted according to technical card instructions); you will need between 100 and 200 g pure product (at least) for each centimetre thickness of the surface to be consolidated.
Marmix is used as a specific mortar for terrazzo and Venetian style floors, with their typical aggregates of assorted marble, glass and coloured sands, either in a coarse-grained or fine-grained (“PASTELLONE”) mix.
Industrial quartz concrete can be coated over after shot blasting or diamond wheel sanding (max humidity content 4 %).
Tiled surfaces must be made rough using a diamond cup wheel.
Large wood panelled surfaces can be coated over after treating the gaps with NORPHEN PU reinforced with a 160g/m² GLASS MESH strip (about 57 cm wide), followed by fine dusting with 0.10.5 mm. quartz sand.
Detailed surface preparation
1) Surface humidity content lower than 4%:
2) Surface humidity content between 4 and 5 %:
3) Surface humidity content higher than 5%:
4) Industrial quartz concrete:
5) Section gaps
Pay special attention to section gaps; this the procedure to follow:
Preparing and laying the mix:
pour MARMIX component A into a suitable container (a bucket will do), followed by component B, and mix to obtain a homogeneous mixture;
transfer to a cement mixer suitable for thick and heavy mortars (e.g. a vertical one with fixed drum and moving blades); add MARMIX component C, mixing to obtain a homogeneous mixture with no dry lumps of powder;
proceed immediately to pour and spread the mix.
Use: the special NORD RESINE thick spatula designed for use with MARMIX (“MARMIX” spatula).
Do not use: a bubble bursting roller to help spread the resin, as you may leave behind small lumps of resin and inert material.
MARMIX’s gel-time is long enough to allow for easy handling, provided the product is kept cool in summer and warm in winter.