LEVEL CRETE

Self-levelling resinous coloured cement
CE MARKING SECOND EN 13813 –SR-B1,0-AR0,5-IR4 

Description

LEVEL CRETE is a coloured or neutral powder premix which with the addition of water becomes a self-levelling mixture tailored for the creation of floorings with the features and rendition similar to concrete.

It can be supplied already coloured or in the NEUTRO BIANCO (neutral white) or NEUTRO GRIGIO (neutral grey) versions to be coloured with a concentrated liquid paste at the moment of application.

Usage field

LEVEL CRETE can be used internally for the covering or finishing of floors in private houses, private or public offices, shops or showrooms, schools and classrooms, hospitals etc.

Using a dusting of it as a finisher, hardened with quartz and levelled with a mechanical spreader. LEVEL CRETE can be used in the industrial sector.

Classification of fire resistance: Class 0 (equivalent to a concrete structure).

Substrates usable

2/1    New substrates:

A. screeds of sand and cement or with sand and a specific binder for screeds (SC 1-BASE);
B. ready-made screeds (SC1, SC 1-F);
C. screeds on heated floors;
D. screeds in natural lime sulphate or anhydrite;
E. self-levelling screeds of sand or cement;
F. panels of multilayered wood or chipboard.

2/2    Old substrates:

A. ceramic tiles;
B. terracotta tiles;
C. burnished marble-cement tiles;
D. natural stone;
E. parquet;
F. resin substrates;
G. industrial concrete floorings.

3. Identification of the products

The features of the products to be used for implementing the complete cycle are found at section 3 of ‘LEVEL CRETE – Instruction manual’.

Packaging

25 kg bags on 56 bag pallets

LEVEL CRETE®

Self-levelling resinous coloured cement
CE MARKING SECOND EN 13813 –SR-B1,0-AR0,5-IR4 

Application

4. Installation

The features of the products to be used for implementing the complete cycle are found at section 3 of ‘LEVEL CRETE – Instruction manual’.

Substrates preparation

4/1  Preparation of the substrates

4/1/1 NEW SUBSTRATES

4/1/1A  Screeds made with sand and a specific binder for screeds (SC 1-BASE) or with sand and cement (washed sand without fine components and Portland32.5 cement measured 200-250 kg for every m3 of the total mixture)

4/1/1B  Ready-made screeds (SC 1 ,SC 1-F)

4/1/1C  Screeds on heated floors

4/1/1E  Self-levelling screeds of sand or cement

Size of the slabs and hardening of the cast - See ‘LEVEL CRETE – Instruction manual’.

Types of treatment for anchorage – Use a roller to apply a generous coat of diluted NORPHEN SW SOLID (dilution: 1 part weighed of (A+B) and 3 parts weighed of water) beginning half an hour before the casting of LEVEL CRETE, so as to have a final utilisation of 60-70 g/m2 of concentrate (A+B). An extension to 2-3 hours of the interval between the application of NORPHEN SW SOLID and the casting of LEVEL CRETE will not compromise the final result, at a median working temperature of 20-25°C.

4/1/1D Screeds in natural lime sulphate or anhydrite

Are mixtures of natural lime which are cast as self-levellers on surfaces to be treated. They are very easy and quick to lay and create a substrate which has an excellent pressure resistance and planarity. On the other hand, as natural lime is a very light binder it loses adhesion and mechanical resistance after setting if is soaked.

Size of the slabs – As the casts are expansive they do not need joints. Therefore, it is possible to create very large surfaces without interruptions. It should be borne in mind that LEVEL CRETE, on this type of surface, needs joints as in the case of normal screeds of sand and cement.

Medium thickness for this type of screed is about 8-10 cm.

Setting of the cast - This is the biggest problem in the use of lime. In fact, it is necessary to wait for about 3 months before beginning the next phase of the work.

Type of treatment for anchorage – Liberally pour diluted NORPHEN SW SOLID (solution: 1 part weighed of (A+B) and 3 parts weighed of water) starting half an hour before the casting of LEVEL CRETE. Slowly transfer it onto the screed with a rubber trowel to obtain saturation resulting in a final utilisation of 70-90 g/m2 of concentrate (A+B). An extension to 2-3 hours of the interval between the application of NORPHEN SW SOLID and the casting of LEVEL CRETE will not compromise the final result, at median working temperatures of (20-25°C).

4/1/1F Panels of multilayered wood or chipboard

Make sure that the panels are jointed with the pin inserted halfway into the breadth and anchored to the base with suitable rawlplugs - 2 per m2 of the surface.

Treat the seams with a strip of fibreglass mesh of 160 g/m2, roughly10 cm, wide, soaked in NORPHEN PU over which quartz sand 0.7-1.2 mm should be spread while it is still wet.

Type of treatment for anchorage- Liberally apply diluted NORPHEN SW SOLID with a hand roller (solution: 1 part weighed of (A+B) and 3 parts weighed of water) starting half an hour before the casting of LEVEL CRETE, so as to obtain a final utilisation of 50-60 g/m2 of concentrate (A+B). An extension to 2-3 hours of the interval between the application of NORPHEN SW SOLID and the cast of LEVEL CRETE will not compromise the final result, at median working temperatures of (20-25°C).

4/1/2 OLD SUBSTRATES

In this type of application, if there are any doubts, it is better to have the substrates examined by an expert in order to ascertain its correct state before covering. In order to define a substrate “healthy” and suitable, break resistance should not be inferior to 1.5 MPa and no capillary rising damp should be visible.

4/1/2A. Ceramic tiles (with or without joints)

With this type of surface it is advisable to check the adhesion of the tiles to the floor. It is possible to proceed only if there is excellent anchorage.

If, however, striking the tiles with a hammer it is noticed that they separate from the floor, it is better to remove them all (or, at least, the part which is not healthy) and restore the gap with GROVE MASSETTO gluing it to the floor with GROVE PRIMER.

It should be remembered that, normally, partial separation in two or three points of the floor make the total removal of the ceramic covering preferable.

Preparation of the floor – Grate the surface with a grinder (e.g. BOSCH GBR 14 with diamond-coated disk), or an HTC sander equipped with a grindstone or a carborundum (silicon carbide) disk.

Type of treatment for anchorage – The day before the casting of LEVEL CRETE apply a coat of NORPHEN FONDO SL using a trowel with 50 % in weight (on A+B) of quartz sand 0.1-0.5 mm, lightly dusted with sand 0.7-1.2 mm.

Utilisation:

  • 0.5-0.6 kg/m2 of NORPHEN FONDO SL (A+B);
  • 0.25-0.30 kg/m2 of sand 0.1-0.5 mm;
  • 0.8-1.0 kg/m2 of sand 0.7-1.2 mm.

 

4/1/2B Terracotta tiles: See 4/1/2A

4/1/2C Marble and burnished cement tiles: See 4/1/2A

4/1/2D Natural stone: See 4/1/2A

4/1/2E Parquet

Preparation of the floor – Sand down the parquet until all the protective varnish has been removed. Screw the parquet to the substrate with suitable rawlplugs (3-5 rawlplugs every m2 of surface depending on the grade of adhesion obtained). Lay a mesh of fibreglass of about 370 g/m2, glue it with NORPHEN FONDO SL applied with a roller using roughly 300 g/m2 and dust “lightly” with quartz sand 0.7-1.2 mm.

After a day, at median working temperatures of 20-25°C, proceed with the laying of LEVEL CRETE.

4/1/2F Resinous substrates

Preparation of the substrate – Smooth the surface with a diamond-coated sander e.g. BOSCH GBR 14 or HTC if the thickness of the resin permits. If not, use sandpaper to create a rough surface.

Type of treatment for anchorage – The day before the casting of LEVEL CRETE apply a coat of NORPHEN FONDO SL with a roller and dust “lightly” with quartz sand 0.7-1.2 mm, or treat with NORPHEN SW SOLID beginning half an hour before casting with LEVEL CRETE.

4/1/2G Industrial concrete flooring

Preparation of the flooring – Smooth the surface with a diamond-coated sander e.g. BOSCH GBR 14 or HTC, or carry out a light shot-blasting.

Type of treatment for anchorage – See 4/1/1A.

Instructions for a double casting: if the thickness of the project requires two casts it should be noted that the preparation of the surface of LEVEL CRETE for a second cast should follow the same procedure as that at para. 4/1/1D Screeds in natural lime sulphate or anhydrite.

4/2  Conditions for the application

4/2/1 MEASURING THE HUMIDITY

Measure with a carbide hygrometer. The humidity of the substrates must not be more than 3% (the measurement should be taken at a depth of 2-4 cm) even on substrates covered with tiles as any rising damp could alter the tonality of LEVEL CRETE

With humidity between 3 and 4.5 % the substrates should be treated the day before with a coat of undiluted NORPHEN SW SOLID, using a roller on the surface and dusting lightly with quartz sand 0.7-1.2 mm.

For residual humidity over 4.5% (up to 7 %) the substrates should be treated in one of the following ways.

4/2/1A Apply a coat of diluted NORPHEN SW SOLID to the substrate (solution: 1 part weighed of (A+B) and 4-5 parts weighed of water); after half and not more than 6 hours apply a first coat of W3 with a steel trowel. The next day apply one or two coats as a finisher of W3, depending on the smoothness and superficial perfection required, for a total consumption of not less than 2.0 kg/m2.

4/2/1B As an alternative to para. 4/2/1A it is possible to create a smooth finish using Q-CRETE, a three component mortar emulsion, in a single coat using a steel trowel, for a total consumption of about 2 kg/m2. Quartz sand 0.7-1.2 mm. should be dusted “lightly” on the fresh surface. In order to allow the floor to set properly LEVEL CRETE should be applied the day after if the temperature of the substrate is more than 15°C, or, after another day if the temperature is between +15 e +5°C.

Rising damp – Check that the humidity referred to at para. 4/2/1 in the substrates is residual humidity and not rising damp, since as time passes there could be loosening from the substrates and variations in the tonality of the coat of LEVEL CRETE.

If there is rising damp, before applying LEVEL CRETE, it is necessary to clean the substrates and block the damp using the most effective procedure indicated by a specialist in this field.

4/2/3 APPLICATION TEMPERATURE

Apply LEVEL CRETE at temperatures between +5 and +30°C. The temperature should be measured at floor level.

4/3 Treatment of cracks and section joints

4/3/1 CRACKS

The following treatments are valid for stable cracks which are no longer subject to any variation in dimension or form.

4/3/1A  Cracks of up to 2 mm in width:

  • Enlarge the crack with an emery wheel to a depth of about1 cm;
  • Blow the dust away using compressed air;
  • Fill the crack with an epoxy filler prepared with NORPHEN FONDO SL adding about 3% of SILICE, and dust lightly with quartz sand 0.7-1.2 mm;
  • wait 6-8 before proceeding with the cast of LEVEL CRETE.

4/3/1B Cracks wider than 2 mm:

  • using a diamond coated disk make a50 cmlong,1 cmlarge and1 cmdeep cut at 90° to the crack and repeat every50 cm
  • prepare50 cmlong and8 mmdiameter reinforced iron rods with good adherence properties;
  • pour NORPHEN FONDO SL thickened with about 3% of SILICE into the crack;
  • insert the rods into the cuts and remove any excess resin;
  • put filler in the joints as at para. 4/3/1A;
  • wait 6-8 hours before proceeding with the cast of LEVEL CRETE.

4/3/2 SECTION JOINTS

4/3/2A  Cement screeds

If the section joint is in correspondence to the threshold of a door or serves to interrupt a form at a corner (an “L” form) of the screed, the joint should be raised and visible in the LEVEL CRETE floor. On the other hand, if it is in the centre of a room and raising it to the new level of the floor is not desired the joint should be reinforced as described at para. 4/3/1B, but with the rods placed about30 cm from one another.

4/3/2B Industrial concrete flooring

If the flooring is at least 18 cm thick and reinforced with two arc-welded meshes:

  • remove any sheathing covering the joint;
  • apply a coat of NORPHEN FONDO to the joint with a radiator paint brush (utilisation: approx.4 gper1 metreof joint for a depth of1 cm);
  • seal the joint with NORPHEN FONDO SL thickened with about 3% in weight of SILICE and dust lightly with quartz sand 0.7-1.2 mm;
  • wait for 6-8 hours before casting LEVEL CRETE.

If the flooring is less than 15 cm thick and reinforced with only one arc-welded mesh:

  • reinforce the joints as indicated at para. 4/3/1B, but insert the rods to a depth of at least3 cm;
  • seal the joint with NORPHEN FONDO SL thickened with about 3% in weight of SILICE and dust lightly with quartz sand 0.7-1.2 mm;
  • wait for 6-8 hours before casting LEVEL CRETE.

4/3/2C Tile or natural stone floors

Sealing the grooves of tiles can be carried out in two ways:

1) fill with a mixture of NORPHEN FONDO SL thickened with 3% in weight (on A+B) of SILICE and 50% in weight (on A+B) of quartz sand grain size 0.1-0.5 mmor 0.3-0.8 mm(depending on the depth and width of the grooves) and dust “lightly” with quartz sand 0.7-1.2 mm;

2) cast MALTA RAPIDA using approx. 4 kg/m2 and dust with quartz sand 0.7-1.2 mm.

Any cracks or joints should be treated as outlined at para. 4/3/1B, but with the rods placed at a depth of at least3 cm.

4/4  Treatment of the expansion joints

The expansion joints in the flooring should be raised to the level of the LEVEL CRETE floor and can be closed using a profile such as Schlüter-DILEX BWS of4.5 mm.

4/5  Treatment of thresholds and the limits of the cast

The cast should be interrupted by a profile parallel to the threshold of the door. The most common type is the “L” shaped one, with a1 mmthick base and a height of 5 mm.

Product application

5. Application of LEVELCRETE

5/1  Preparation of the self-levelling mixture

5/1/1 PREPARATION OF THE MIXTURE PRE-COLOURED IN BULK

5/1/1A Manual preparation (for surfaces areas of up to 300 m2)

The team of spreaders needed to effect the cast must number at least three:

  • one preparing the product;
  • one transferring the prepared product;
  • one spreading the product.

After having prepared the floor, the preparation of LEVEL CRETE should be made in a50 litrecontainer in which it is possible to mix 2 bags of25 kgof the product.

Particular importance should be paid to the mixer which should have good mixing qualities and should be equipped with a large rotor (diameter of about15 cm), and to the measurement of the water for the mixture.

In order to have continuity it is better to use two containers.

Pour the water into the container and then add LEVEL CRETE and mix until a perfectly homogeneous amalgam is obtained.

5/1/1B Mechanical preparation (for surface areas of more than 300 m2)

The ideal mixer is the type with a two headed stirrer e.g. DUO MIX made by M-TEC (for advice it is possible to contact technical services at NORD RESINE).

Begin by lubricating the entry tube with water and then the trial mixing can start (to be poured into containers which can be removed at the end of the job) until the correct quantity of water has been settled. At this point it is possible to proceed with the spreading of LEVEL CRETE onto the ready prepared substrate.

5/1/2 PREPARATION OF THE MIXTURE TO BE COLOURED AT THE MOMENT OF THE CASTING (ONLY FOR MANUAL CASTINGS)

LEVEL CRETE is prepared in this way:

a.      pour the water into the container;
b1.    add the colouring paste PREMIX LEVEL CRETE (3 % of the weight of the dry product);
b2.    if the concentrated colouring paste of the series SISTEMA TINTOMETRICO is being used, 15 ml of additive LEVEL CRETE ANTIFOAM for each50 kg of dry product should be added to the water of NORD RESINE after having added the colouring paste;
c.      mix mechanically to amalgamate the colouring in the water;
d.      pour LEVEL CRETE NEUTRO (WHITE or GREY) and mix until a perfect homogeneous amalgam is obtained;
e.      wait 4-5 minutes, remix for a few seconds and proceed with the cast.
 

LEVEL CRETE ANTIFOAM

Specific antifoam emulsion for LEVEL CRETE

measure

15 ml (equal to about 13g) every50 kgof LEVEL CRETE neutral white or grey

method of measuring

the measurement of antifoam is done with a special measurer for LEVEL CRETE ANTIFOAM

 

Features

Volume mass, UNI 8310

g/cm³

0.87 ± 0.02

N.B.:the testing method follows the regulations quoted.

Packaging and storage

Packaging

0.8 e4.0 kgin plastic containers

Storage

12 months in the original packaging, in a dry covered place, at temperatures between +5 e +35°C

5/2  Casting the self-levelling mixture

The product should be cast on a surface and spread to an even thickness using a smooth notched trowel adjustable in height.

Immediately afterwards a steel-spiked roller should be used to eliminate bubbles.

6. Finishing with LEVEL CRETE

The description of the following listed finishings can be found at sections 6/1 to 6/5 of ‘LEVEL CRETE – Instruction manual and laying cycle’:

6/1  Use of the trowel in the casting phase

6/2  Use of the mechanical spreader in the plastic phase

6/3  Smoothing the set product

6/4  Complete the finishing with a trowel

6/5  Complete the covering with a trowel

6/6  Transparent anti-stain treatment and reinforcement with a wax finish

6/6/1 SOAKING WITH NORPHEN SW SOLID

Prepare a measure of NORPHEN SW SOLID by mixing the components A+B together. Add4 litresof water for every litre of concentrate and apply with a waxer ensuring that the operation is repeated often in order to obtain a good penetration of the surface.

 

6/6/2            TREATMENT WITH NORDPOWDER CERA (wax)

Pour NORDPOWDER CERA into a container (a basin) and apply to the floor after the first soaking with NORPHEN SW SOLID has dried (it is better if this job is done the day after). The spreading should be done using a waxer ensuring a perfect distribution of NORDPOWDER CERA by observing the result against the light. The treatment has been done correctly if the glossy surface is completely uniform.

Utilisation: normally there is a consumption of 60 to 70 grams of undiluted NORPHEN SW SOLID and 40-60 grams of NORDPOWDER CERA for each coat of the treatment.

The above described treatment  is normally used in environments where there are no problems of products falling which might mark or even melt the wax. It should be borne in mind that NORDPOWDER CERA was not designed for flat external surfaces. For environments where there are spilt liquids with penetrating effect such as restaurants a finish as described at para. 6/7 is preferable.

6/7  Transparent anti-stain treatment and reinforcement with a finish produced using a resin which does not go yellow

6/7/1 SOAKING WITH NORPHEN SW SOLID

Prepare a measure of NORPHEN SW SOLID by mixing components A+B. Add 4 litres of water for each litre of concentrate and apply with a waxer ensuring that the operation is repeated often in order to obtain a good penetration of the surface.

6/7/2 TREATMENT WITH NORDPUR ESTERNI

Prepare a measure of NORDPUR ESTERNI TRASPARENTE and pour it into a container when the first coat is already dry (it is better to apply the day after). Spread the product with a short-bristled solvent roller criss-crossing the rolling and distributing the product until it is even. It is also possible to use an airless sprayer. The airless sprayer is necessary when NORDPUR ESTERNI TRASPARENTE OPACO is to be applied.

Utilisation: a normal consumption would be 60-70 grams of undiluted NORPHEN SW SOLID and 100-120 grams of NORDPUR ESTERNI for each coat of treatment.

USE OF THE PREMISES

The premises must be kept at a temperature not less than15°C for at least 72 hours after the end of the spreading.

Nord Resine Spa assures the contractors and applicators, who request it, that they will be given all necessary information at the beginning and during the course of the work. This disposition must not be taken to mean that we accept any responsibility or control in the correct course of the spreading operation.

Storage

7. Daily maintenance

For a correct maintenance of the LEVEL CRETE floor our advice is to use the specialised detergent LILIUM, in portions of 0.1 litreeach10 litresof cleaning water.

N.B. if, after some time the surface becomes more opaque in the area of major foot traffic it is possible to re-wax the floor provided that it is first washed with STRIPPER diluted 1 to 5 in water, using a buffer and then aspirating the liquid. NORDPOWDER CERA can then be applied in one or two coats using a white fleece waxer.

LEVEL CRETE®

Self-levelling resinous coloured cement
CE MARKING SECOND EN 13813 –SR-B1,0-AR0,5-IR4 

Average Consumption

In order to obtain a level of about 5 mmit is necessary to use 9 kg/m2 of LEVEL CRETE (powder).

LEVEL CRETE®

Self-levelling resinous coloured cement
CE MARKING SECOND EN 13813 –SR-B1,0-AR0,5-IR4 

Features

mass volume of mixture, UNI 8995

g/cm³

1990

granulometry, UNI EN 933-1

mm

< 0.4

Maximum thickness of coat

mm

 10

Water for mixture (according to colour)

% p/p

18.5 - 20

Time before setting starti

Mins

100 ± 20

Pot life

mins

< 45

consistancy, UNI 8997

---

superfluid

Bending strength after 28 days, UNI 196

MPa

12 ± 2

Pressure resistance after 28 days, UNI 196

MPa

30 ± 5

Adhesion to concrete (7 days), UNI 8298-1

MPa

> 2.5

Application temperature

°C

+5 - +30

N.B. the testing method refers to the regulations quoted.

LEVEL CRETE®

Self-levelling resinous coloured cement
CE MARKING SECOND EN 13813 –SR-B1,0-AR0,5-IR4 

Preservation

9 months in original packaging, in dry covered place at temperatures between +5°C and +35°C.

Protect from damp.