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• Features & Benefits
• Application Notes
• Limitations

Features & Benefits

• Reduces porosity and permeability
• Promotes self-healing of static cracks up to 0.4mm
• Suitable for structures subjected to sustained hydrostatic pressure
• Increases water resistance and corrosion resistance
• Chloride free. Ideal for concrete containing embedded steel
• Pre-bagged powder for easy dispensing
• Easily dispersed throughout concrete mix
• BBA accredited, certificate no. 21/5849
• Can form part of a complete waterproofing solution in conjunction with the Fosroc range of membranes and drained cavity systems

Uses

• Production of watertight concrete for above and below ground level conditions
• Concrete for liquid retaining / excluding structures
• Concrete for aggressive exposure classes
• Suitable for use with all types of Portland cements and combination materials such as fly ash, PFA, GGBS limestone fines and micro silica
• Similar mechanical properties to that of an equivalent plain concrete with the same mix design and consistency

Application Notes

• Typical dosage is 1 bag per cubic metre of concrete based a 350kg / m³ mix design (1.17% by weight of cement)
• The reinforcement design for the concrete structure must be designed to achieve a maximum through section crack width of 0.3mm although where there is evidence of increased risk due to a high or variable water table a through section crack width of 0.2mm may be stipulated
• The standard minimum sectional thickness is 200mm although a greater minimum thickness may be recommended for specific projects
• The maximum area for a single concrete pour for a floor area is 400m² for which the aspect ratio should not exceed 2:1. The maximum aspect ratio for a single wall pour is 3:1 and this should not include more than two corners or changes of direction
• The concrete must have a minimum cement content of 350 kg/m³, be batched with a maximumwater/ cement ratio of 0.45 and have a consistency of S3 or greater
• Supercast SW20 waterstop should be continuously bonded with Supercast SWX which should be allowed to cure for at least 8 hours prior to concrete pour. The Supercast SW20 must be butt jointed and not overlapped with any gaps filled with Supercast SWX
• In line with good concrete practice: cure all concrete with Concure WB Clear
• Supplied in tubs containing 6 x 4.1 kg units

Limitations

• Concrete containing the product should not be placed at temperatures of 5°C or below
• Concrete containing the product must be properly compacted, avoiding honeycombing and voids, particularly in areas in the vicinity of joints
• Water resisting concrete incorporating the product must be designed to avoid crack width formation in excess of that stipulated in the guidelines above and in BS EN 1992-3:2006
• Joint designs other than those stipulated in the guidelines above should not be used with water resisting concrete incorporating the product
• Concrete containing the product can meet the requirements for all grades defined in Table 1 of BS8102, however for Grade3 (where control of water vapour is required) it will be necessary to provide a mix with a sufficiently low vapour permeability in combination with an adequate section thickness (see guidelines above). Consideration should also be given to its use in conjunction with Type A (Barrier) or Type C (Drained Cavity) where assessed external risks are too high or consequences of failure to achieve the required internal environment are unacceptable