CM 760 Fibre

  • Pumpable

CM 760 Fibre is a pumpable, fibre-reinforced self-levelling underlayment.

The product is fibre reinforced, quick setting, self-drying and has a very good flow rate. The CM 760 is suitable for new construction, renovation and heated floor systems. The product is intended for indoor use on substrates of concrete, lightweight concrete, stone, ceramic tiles, homogenous PVC, wood and gypsum underlay. CM 760 is frost resistant and can be used outdoor on concrete substrates, under teils, except in salt environments.

Documents

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Specifications

Technical data
Environment inomhus, utomhus
Substrate betong, golvgips, homogen-pvc, lattbetong, sten, tra, varmegolv, keramik-klinker, lattmassa, varmeplatar, fribarande-underlag
Slope construction ja, nej
Leveling layer 1 5–50 mm
Leveling layer 2 6–20 mm on lightweight concrete
Grain size < 2 mm
Material consumption 1,7 kg/m²/mm
Water demand 3,6 l/20 kg
Flowability max 135 mm
Working temperature 10–25 °C
Mixing time 3 min
Workable 10–25 min
Drying time category sjalvtorkande
Walkable 1–3 hrs
Coatable (tiles) 12 hrs
Carpet applicable 1–3 days
Water damage resistant yes
Surface tensile strength 28 days (ground loaded surface) > 1.5 MPa
Free shrinkage 0.03–0.05 %
TVOC 28 days 10 μg/(m2 h)
Final surface klinker, limmade-plastmattor, tatskikt, loslagt-tragolv, limmad-parkett

Usage

Pre Treatment

The substrate should be clean and free of dust, cement skin, grease and other impurities that can prevent adhesion. Adhesion and surface strength of the substrate should be no less than 0.5 MPa. Always prime the underlying substrate with PP 600 and allow to dry before pouring. In terms of the primer forming a film and the curing of the self-leveling, the temperature of the substrate must not fall below 10 °C. For best results, the ambient temperature in the work area should be between 10 and 25 °C. At higher or lower temperatures, the time for curing will shorten or extend. With the risk for cracks due to shrinkage or settings in the subfloor, a concrete surface should not be leveled within the first 28 days after casting. As a recommendation the RH in the concrete should have reached RH 95 % as the upper limit for pouring the CM 760. Use the Combimix form foam for edging. In order to avoid drainage pipes from getting clogged, always make sure the drains are properly sealed before pouring.

Mixing

Mix the dry powder with max 3.6 liters of water (max 18 %) per 20 kg bag. Mix with a drilling machine and a whisk, or a mixing pump intended for this purpose. The correct water mixture can be tested using a slump test with a cylinder with Ø 30 mm and a height of 50 mm on 300 x 300 mm plexiglas plate. With the correct water mixture, the spread should be max 135 mm. The slump test also checks that the material is well blended and that there is no separation.

Application

The mixed material is applied by hand, or pumped out onto the substrate in lengths. Each new ribbon is added to the old one as soon as possible so that the material can blend together and create an even surface. The width of the ribbons can be adjusted to the capacity of the mixing pump and the thickness of the covering. The material requires a light treatment with a toothed trowel to provide maximum smoothness.

Post Treatment

You can easily shape or cut the semi- hardened self-leveling underlayment material before it fully dries. Always make sure that the material is sufficiently dry before it will be covered by a carpet or a foilsystem. The CM 760 may be covered by a carpet or a foilsystem after 1-3 days depending on the thickness. The guiding value assumes a curing temperature of approximately 20 °C, 50 % RH and proper air flow. Newly produced surfaces must be protected against wind, sun and rain.

Storage Packaging

Store in a dry environment, on an unopened plastic-coated pallet, 6 months from the date of production. The date of production is printed on the packaging. May be used after 6 months but properties such as flow rate, hardening and drying times will be extended. CM 760 Fibre is delivered in 20 kg bags and in big bags.

Residual Products Protection Instructions

Empty bags can be burned. Any remaining, dry powder that has been stored properly can be used again. Hardened material should be disposed of as construction waste. Do not wash the product into the sewage system. The cement in the product has a reduced level of chromate. Follow regulations in each respective country.

Packaging

76003 1000kg
76005 20kg
76009 bulk

Certifications