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Expansion Concrete Std Winter

Expansion Concrete Std Winter is used in concrete casting where all sides of the casting site are available and there is a requirement for total filling.

The product is intended for use in temperatures down to -10 °C. Used during the undercasting of steel and concrete pillars, concrete elements and machines, as well as for the setting of railings and pillars. The product provides high strength and good adherence to the adjacent surfaces, as well as good corrosion protection for the casting components of untreated steel. The product provides a good sealing and thus a good protection against external influences: for example, from detergents, light acid corrosion, salt solutions and the like. The product is pumpable.

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Product specification

Technical data
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Compressive strength class

C45/55

Water-cement

0.40

Frost resistance

good

Expansion

< 4 %

Binder

Portland cement

Thickness

30–150 mm

Grain size

≤ 3 mm

Air content

approx. 5 %

Water requirements

2.4 liters/20 kg

Material consumption

approx. 2,0 kg/m²/mm

Workplace temperature

10–25 °C

Pre-water

yes

Mixing time

3–7 min

Operating time 20 ° C

approx. 30 min

Begins to cure

in approx. 3–4 hrs

Post-watering

72 hrs

Color

grey

Packaging
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33305

20 kg

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Use

Pre-treatment
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For the best results, the temperature in the work area should be between 10–25 °C. Store the dry mortar and other materials so that they will remain at over 10 °C before use. At temperatures lower than 5 °C, the strength development will cease. If the product is used in temperatures below 5 °C, then winter measures should be implemented. The substrate should be clean and free from dust, a cement skin, grease or other impurities that can prevent adhesion. Smooth and glossy surfaces should be roughened and elutriated, when necessary. Pre-water before the casting begins. There must not be free water in the casting form. Aluminium may not be casted on. Galvanised castings shall be protected by painting in the part to be casted.

Mixing
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The dry powder is mixed with 2.4 litres of warm water (12 %) per 20 kg bag. The temperature of the water is recommended to be 20–30 °C. The mixing is done in a paddle mixer or a free fall mixer for approx. 3–7 minutes, or with a drill and a whisk. The mortar is mixed into a homogeneous mass. If the product is used with more water than is recommended, it will result in a lower strength and a risk of separation and shrinkage. Use the pre-mixed mass within approx. 30 minutes.

Application
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Fill the form with the pre-mixed mortar. Work in a direction so that no air-pockets are formed. Vibrate sparingly. Mortar that has started to cure may not be mixed with more water and must be discarded.

Post-treatment and curing
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Protect the newly-cast surfaces immediately from direct sunshine, rain and high wind. Postwatering should always be done for at least three days in dry and warm weather, as well as in the case of strong winds. Use a water hose with a fine spray nozzle. The strength increases with the post-watering of the cured material. Cover the post-watered surface with plastic. At temperatures lower than 0 °C, do not post-water, but cover the surface with plastic. The concrete surface must not be exposed to frost before the strength has reached 5 MPa.

Consumption calculator

Expansion Concrete Std Winter

Consumption calculator

phone

+46 171 46 65 90

Call our order department

Contact us

  • Verkstadsvägen 6
  • 746 40 Bålsta, Sweden
  • Tel. +46 171 46 65 90
  • E-mail: info@combimix.com

Combimix

Combimix develops and manufactures mineral-based products for the construction industry. Our product range includes products for floor levelling, façade plastering, rendering, concrete resurfacing and restoration mortar for cultural buildings. We conduct sales in Europe and USA.

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