is a high range superplasticising admixture. Complies with IS:9103:1999 and BS:5075 part 3. It also conforms to ASTM C-494 Type ''F'' and type ''G'', depending on the sages used.
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- To provide excellent acceleration of strength gain at early ages and major increases in strength at all ages by significantly reducing water demand in a concrete mix. ! Particularly suitable for precast concrete and other high early strength requirements. ! To significantly improve the workability of site mixed and precast concrete without increasing water demand. ! To provide improved durability by increasing ultimate strengths and reducing concrete permeability.
- Major increases in strength at early ages without increased cement contents are of particular benefit in precast concrete, allowing earlier stripping times.
- Makes possible major reductions in water:cement ratio which allow the production of high strength concrete without excessive cement contents.
- Use in production of flowing concrete permits easier construction with quicker placing and compaction and reduced labour costs without increasing water content.
- Increased workability levels are maintained for longer than with ordinary sulphonated melamine admixtures.
- Improved cohesion and particle dispersion minimises segregation and bleeding and improves pumpability.
- Chloride free, safe for use in prestressed and reinforced concrete.
- Conplast SP430 conforms with BS 5075, BS:EN 934-2 and with ASTM C494 as Type A and Type F, depending on dosage used.
- Fosroc provides a technical advisory service for on-site assistance and advice on admixture selection, evaluation trials and dispensing equipment. Technical data and guidance can be provided for admixtures and other products for use with fresh and hardened concrete.
Use at other Dosages:
- The optimum dosage of Conplast SP430 to meet specific requirements should always be determined by trial mixes using the materials and conditions that will be experienced in use. For high strength, water reduced concrete the normal dosage range is from 1.00 to 3.00 litres/100 kg of cementitious material, including PFA, GGBFS and microsilica. For high workability concrete the normal dosage range is from 0.70 to 2.00 litres/100 kg of cementitious material.
- Dosages outside the typical ranges quoted above can be used to meet particular requirements. Contact Fosroc for advice.
Effects of Overdosing:
Instructions for use:
- An overdose of double the amount of Conplast SP430 will result in an increase in retardation as compared to that normally obtained. Provided that adequate curing is maintained, the ultimate strength of the concrete will not be impaired by increased retardation and will generally be increased. The effects of overdosing will be further increased if sulphate resisting cement or cement replacement materials are used.
Where the main requirement is to improve strengths, initial trials should be made with normal concrete mix designs. The addition of the admixture will allow the removal of water from the mix whilst maintaining workability. After initial trials, minor modifications to the overall mix design may be made to optimise performance.