Colours for Cement
SPECIAL FEATURES
Disperses rapidly throughout the mix.
Lime resistant.
Light, fast and durable.
DESCRIPTION
Colours for Cement are specially prepared for colouring
cement, concrete, renderings, mortars and flooring compositions.Most of the colours are formulated using pigments conforming to British standards 1014: 1975. Surface active materials and finely divided solids are added to improve dispersion of colour and to ensure easier placing and finishing
.Colours for Cement are resistant to lime, light and moderate heat. A special feature of the formulation provides rapid miscibility with the cement. Colours for Cement are suitable for both interior and exterior use, and are intermixable to give a wide variety of shades for any type of cementitious work.
SITE WORK
Colours for Cement should be added to the dry cement, sand, aggregate etc, when mixing either by hand or machine and thoroughly blended into all the materials.
The maximum rate of addition is 5 KGs of Colours for Cement to each 50 KGs of cement and this rate of addition should not be exceeded. For lighter shades quantities below this rate may be used but in all cases ensure consistency in colour from one batch to another the amount of colour must always be gauged by weight on the cement content - never by volume. In order to reduce efflorescence, lime bloom and thereby improve colour retention, the incorporation of Integral Waterproofing liquid is recommended.
NOTE: DO NOT USE MORE THAN ONE ADMIXTURE IN MIXES CONTAINING COLOURS FOR CEMENT.
The colour of the cured mix will differ from a wet mix, therefore it is essential that when a particular shade is required, colour matching is assessed on a cured mix. The correct selection of cement, sand and aggregate is essential for good colour results and it is necessary to ensure that the grading of these materials is suitable. Strongly coloured sands and aggregates can affect the final colour of the mix, particularly where light shades are required. Care should therefore be taken in this selection, ensuring at the same time that continuity of supply materials is such that the whole job may be completed with consistent colour and grading. Where clear pastel shades are required, we recommend the use of white cement.
In mixes where the volume batching is used, proportions should be calculated for dry materials, remembering that damp sands can increase bulk by as much as 40%, depending upon water content and grading. Allowance should be made for this when gauging, remembering that the Colours for Cement must be proportioned by "weight" on the cement content.
For specialist application e.g. In Gypsum Plaster, Tile grouts with resin binders and special cements, contact "The Durabond Technical Department"
RS Sales Ltd
Unit 3
Dundrum Business Park
Dundrum
Dublin 14
TEL: 01 6731300 / FAX: 01 6731301
APPLICATION
BRICKLAYING MORTAR
General-purpose brick mortars can be produced using the following proportions of materials by volume:
Portland cement (Grey or White) 1 part. Clean soft sand 6 parts.
Durabond Mortar Plasticiser 0.25 litres per 50 KGs cement or Durabond Integral waterproofing liquid 0.5 litres per 50 KGs cement.
Colours for Cement up to 5 KGs per 50 KGs cement.
Water to soft buttery consistency.
Mortars for special bricks, engineering bricks, etc may require a mix of higher cement content. Calcium silicate or similar bricks may require a weaker mix and in such cases the brick manufacturer should be consulted.Colours for Cement can be used to produce coloured mortars for these bricks.
Pointing mixes are normally produced with a higher cement content than bedding mortars. As a general rule the cement content should be increased by no more than 50%. Bedding joints should be raked out and Durabond Super Mortar Plasticiser used in conjunction with Colours for Cement will produce a pointing mix of good colour and high bond strength to the brick and bedding mortar surfaces reducing the risk of cracking and dropping out.
WALL RENDERINGS
With cement renderings, trowelling of the surface may cause crazing and / or discoloration due to lime bloom. To avoid this a scraped or textured finish is advised.
The rendering mix should be proportioned as follows - all parts by volume.
Portland cement (Grey or White) 1 part.
Clean sharp sand 6 parts.
Durabond Super Mortar Plasticiser 0.25 litres per 50 KGs cement. or Durabond Integral Waterproofing liquid 0.5 litres per 50 KGs cement.
If hydrated lime is used in the mix DO NOT USE ANY ADMIXTURE. Normally a waterproofing or plasticising admixture is recommended, as hydrated lime will lighten colours.
Colours for Cement added up to a maximum of 5 KGs per 50 KGs cement.
Water sufficient to give an easy applied mortar.
The mix should be trowel applied in the normal manner - the surface to be rendered being cleaned and prepared prior to application according to the normal trade practise. The first coat uncoloured applied at an average thickness of 15mm (approx. ½") should be scratched to form a key for the final coat and left to harden. The second (or final) coat should be applied at an average thickness of 8mm (approx. ¼") this coat having Colours for Cement added to the mix. The quantity of Colours for Cement required for this final 8mm (approx. ¼") coloured coat will be up to a maximum of 0.1 KGs for each square metre (approx. 2¾ ozs per square yard).
ROUGHCAST AND HARLING
"Pebble-dashed" finishes with a coloured background to the exposed pebbles, white spar, etc used can be produced by adding colours for cement to the rendering mix on to which the coarse aggregate is dashed. Roughcast finishes used for wet casting mixes in which the coarse aggregate is mixed can also be coloured with colours for cement.
TYROLEAN FINISHES
The standard mix for finishes of the machine-cast as follows - all parts by volume.
Portland cement (Grey or White) 1 part.
Sand 2 parts.
Colours for Cement up to 5 KGs per 50 KGs cement
Integral waterproofing liquid ½ litre per 50 KGs cement.
Water sufficient to produce a "thin cream".
Application is carried out by Tyrol Hand Machine in the normal manner.
SWIMMING POOLS
Renderings for swimming pools should be denser than renderings applied normally to exterior surfaces and the mix should be proportioned as follows:
Portland cement (Grey or White) 1 part.
Sand (clean sharp) 2½ parts
Colours for Cement up to 5 KGs per 50 KGs cement.
Durabond Integral Waterproofing liquid 1 litre per 50 KGs cement.
Water gauge as dry as practicable.
The rendering mix should be applied in two coats. Colours for Cement being added to the second (final) coat. The thickness of the first coat should average 15mm (½") and the second coat 8mm (approx. ¼"). The quantity of Colours for Cement required for the final coloured coat will be up to a maximum of 0.5 KGs to each square metre of rendering. Never apply a strong rendering to a weak backing. Wet gauging will inevitably lead to shrinkage cracking. Prevent the rendering from drying out too much during the first 48 hours e.g. by mist spraying with water.
FLOORING
All granolithic or sand / cement pavings or toppings should be gauged to a stiff consistency with only sufficient water added to produce a mix which can be placed or compacted satisfactorily. Mix proportions should be in accordance with normal trade procedure.
Surface finishing should be carried out in the normal manner avoiding over-trowelling. Trowelling should only take place on the day of placing the mix and no more material than can be finished in one day should be placed. The practise of adding dry cement or colour must not be employed. When the surface has been finished, curing should be carried out. It is preferable to lay granolithic pavings or sand /cement toppings while the base concrete is still "green" or plastic, keying the soft surface by dragging a hard broom over the surface to expose aggregate and remove any excess latence that may have formed during tamping. If the base is allowed to become hard after this operation FEBOND SBR should be used to give a perfect bond between the two layers, before continuing with placing the topping. The bays should be laid in bays of maximum "16 square metres". Again prevent drying out too much during the first 48 hours.
GRANOLITIC FLOORS
(1) Prepare base.
(2) Produce a granolithic mix of the following proportions by volume:
Portland cement (Grey or White) 1 part.
Coarse washed sand ½ part.
Crushed granite (no dust) 2 parts.
Colours for Cement not more than 5 KGs per 50 KGs cement.
Durabond Integral Waterproofing Liquid ½ litre per 50 KGs cement. or Febond SBR 10 litre per 50 KGs cement.
Water approx. 22.5 litres per 50 KGs cement.
(3) The above mix should be laid in accordance with the requirements of C.P. 204 at a thickness of 20mm (approx. ¾"), not exceeding 25mm (approx. 1") as a monolithic slab; or less than 38mm (approx.1½") on a prepared mature base.
The amount of Colours for Cement required for each square metre of flooring is 0.85 KGs for each 20mm of thickness when used at the rate of 5 KGs to each 50 KGs cement.
SAND AND CEMENT SCREEDS
(1) Prepare base.
(2) Compose the mix in the following proportions by volume:
Portland cement (Grey or White) 1 part.
Coarse washed aggregate 2½ parts.
Colours for Cement not more than 5 KGs per 50 KGs cement.
Durabond Integral Waterproofing Liquid ½ litre per 50 kgs cement.
or Febond SBR 10 litres per 50 KGs cement.Water approx. 25 litres per 50 KGs cement.
(3) The above mix should be laid in accordance with the requirements of C.P. 204 at a thickness of 20mm (approx. ¾"), not exceeding 25mm (approx. 1") as a monolithic slab; or not less than 38mm (approx. 1½") on to a prepared mature base.
The amount of Colours for Cement required for each square metre of flooring is 0.56 KGs for each 15mm of thickness, when used at the rate of 5 KGs to 50 KGs of cement.
PRODUCT DATA
Colour range Brick Red, Buff, Dark Brown, Russet Brown, Yellow, Grass Green, Tile Red, Black and Terracotta.
Shelf life More than 2 years.
Storage Store in a cool dry place.
Pack sizes ½ kg, 1kg, 5kg and 25 kg.
Safety Not classified as hazardous.
Instructions for safe handling and use of Durabond Colours for Cement are given on the product label. More details and information for hazard assessment, emergency procedure etc are available for Durabond Ltd.
These illustrations indicate the shades obtainable when 2.5 KGs of colours for cement is added to 50 KGs of Portland cement and 3 parts aggregate (by volume). An infinite variety of pastel shades can be obtained by increasing the colours for cement content up to the maximum of 10% cement by weight.
These colours are intended to give a close indication of colour, but no responsibility can be accepted for variations, which may occur.
Occasionally, due to variation in raw material supplies, it is necessary to make slight adjustments to colour standards.
AVAILABILITY
Republic of Ireland and the U.K. - Through all leading Builders' and Decorators' Merchants.
Overseas - Please contact our Export department for a list of stockists throughout the world.
TRADE MARKS
DURABOND is the registered trademark of Durabond Ltd.