SELF-LEVELLING ROUGH FLOOR (from 5 mm to 30 mm)
UNDER TERRACOTTA, TILES AND WOOD FLOORING
FOR INTERNAL USE

USE

AVAL KN 10 is a self-levelling anhydrite jointless floor suitable for mechanical and manual rough floor making under terracotta, wood flooring and various floor covering. It is suitable for all kinds of dry residential buildings, public buildings and other places provided that its parameters comply with utilisation and strength properties of such locations. AVAL KN 10 can be used only as connected jointless floor. It can also be used as the levelling layer on floor heating systems. It can be used only for indoor use with layer thickness from 0.5 to 3.0 cm.

PROPERTIES

AVAL KN 10 is a ready-made dry mixture of mineral binders (anhydrite flour, a gypsum and Portland cement), fillers and modifying agents. It is very convenient and easy to use. It has a self-levelling ability, can be easily and quickly poured on substrates using machines equipped with worm pumps. This ensures efficient application and lower labour costs. AVAL KN 10 shows very good strength properties and after setting, it is virtually a non-contracting material.

SUBSTRATE PREPARATION

AVAL KN 10 can be applied on any mature mineral substrate, except for substrates with magnesia binder. The substrate should be dry and free from anything that may impede adhesion, in particular dust, dirt, lime, oil, fat, wax, bitumen, paint, etc. Mechanically remove loose elements and parts of substrate of poor strength. If necessary, the use of AVAL KN 97 priming emulsion is recommended to reduce the substrate`s absorptivity. The emulsion, among others, prevents air bubble formation on the surface. AVAL KN 10 is not suitable for rooms in which humidity penetration is possible. All steel elements that are in contact with the rough floor should be protected against corrosion. Intermediate expansion joints are not necessary in case of pouring of jointless floor over a surface smaller than 50 m2 where the diagonal is less than 10 m. Due to the risk of underlayment outflow, the substrate should have a tank-like appearance. However, separate the unbonded floor from walls and other elements within the pouring area using expansion tapes or thin strips of foamed polystyrene.

MIX PREPARATION

In case of mechanical pouring, pour a dry mixture to a basket in a mixing-pumping unit and appropriately set the fixed level of dosed water that ensures correct consistency of the mix flowing out from a hose. In case of manual pouring, prepare it by pouring dry mortar into a container with suitable amount of water (in the ratio of 5.7÷6.0 l of water for 30 kg of container) and mix until homogenous. Do it mechanically; a drill with a mixer is recommended. The mix is ready to use immediately after mixing. It maintains its properties for ca. 30 minutes. To check consistency, pour out the mortar from a 1 l container onto even non-absorptive substrate (for example - foil). The mortar should then form a `patch` of ca. 45-50 cm in diameter.

APPLICATION

The mix is poured out mechanically using a mixing-pumping unit with continuous flow proportioning of water. It can be poured manually, but only on surfaces divided into technological fields that enable pouring within 30 minutes. Before starting work it is necessary to set the planned thickness of the rough floor (on the walls and in the pour area) in the rooms. This can be done using for example a level and portable height bench-marks. Pour the prepared mortar evenly and continuously up to the desired height, avoiding gaps. The assumed technological field should be completed in ca. 30 minutes. Right after pouring in each field, de-aerate the material using, for example, a de-aerating roller or a brush with long hard horsehair, moving the brush in shaking manner along and across the poured surface. Then self-levelling of the material occurs automatically. Constantly check the mixing degree and consistency. During first two days of maturation of the jointless floor, do not expose the floor to direct sunlight and draughts, and provide proper ventilation of rooms. If white tarnish has appeared on the surface, remove it mechanically by grinding, and then vacuum the whole surface. Grinding accelerates the drying process. The drying time of the unbonded floor depends on the layer thickness and also thermal conditions and humidity in a given room. Depending on the maturation conditions, humidity, type of floor covering and its permeability, floor covering operations can start on average after 2÷3 weeks. Before commencement of work, it is recommended to dry unbonded floor surface thoroughly and prime it with AVAL KN 97. The information comprises basic instructions of product application and do not relieve users of responsibility for work in accordance with good construction practice and OHS regulations.

CONSUMPTION

On average, 20 kg of the mortar is used for 1 m2 for each 10 mm of the layer.

TOOLS

Drill with mixer (manual pouring), mixing-pumping unit (mechanical pouring), brush with long hard horsehair or de-aerating roller , height benchmarks. Wash the tools with clean water directly after use.

PACKAGING

Paper bags: 30 kg Pallet: 1080 kg in 30 kg bags

STORAGE & TRANSPORT

Keep dry. Store and transport dry on pallets in tightly closed bags. Shelf life is 6 months from the production date on the packaging.

CAUTION

Alkaline reaction with water – protect eyes and skin. In case of direct contact with eyes, seek medical attention.

TECHNICAL DATA

Mixing proportions: ca. 0.19÷0.20 l of water for 1 kg of mortar ca. 5.70÷6.00 l of water for 30 kg of mortar Pot life - ca. 30 minutes Mortar preparation temperature – from +5°C to +25°C substrate and ambient temperature during work – from +5°C to +25°C Rough floor use - after ca. 6 hours. Complete setting and drying – min. 2 weeks Floor covering - rough floor humidity not greater than 1.5% (in case of non-permeable and wood-based floor covering, observe manufacturer`s recommendations of adhesive and covering) Max. aggregate diameter – 0.8 mm Min. layer thickness - 5 mm Max. layer thickness - 30 mm Content of soluble chromium (VI) in ready-to-use mix - ≤ 0.0002% Reaction to fire - A1fl class pH >7 Compressive strength C35 (min. 35 N/mm2) Flexural strength – F6 (min. 6 N/mm2) Corrosive substance release - CA Water and water vapour permeability – NPD Sound insulation - NPD Sound absorbance - NPD Thermal resistance - NPD Chemical resistance - NPD