P4

Product Advantages

• The effective plasticising action of P4 will give increased workability to most types of concrete mixes. Harsh mixes, such as those produced with crushed rock aggregates, are considerably improved in the plastic and hardened state.
• When used for its water-reducing effect, reductions in the water content in the region of 10% can normally be achieved with subsequent increases in strength, impermeability and durability.
• P4 can be used to modify concrete mix designs to achieve cement reductions.
• The reduction in excess water which can be achieved, together with the slight air entrainment, characteristic of lignosulphonic acid derivatives, is effective in increasing the impermeability of concrete. Surface finishes can be improved and blemishes such as ‘sand runs’ overcome.
• P4 is of particular value in concreting operations subject to high ambient temperatures.
• It extends the period of time when the concrete can be placed and compacted.
• P4 is recommended for use where waterproofing of structural concrete is specified. Significant reductions in water permeability and penetration can be obtained.

Typical Properties

Appearance: Dark brown liquid

Specific Gravity: 1.195kg ± 0.02kg

Air Entrainment: Air content of concrete mixes will normally be increased by between 1% and 2%

Compatibility With Cements

P4 can be used with all types of Portland, Pozzolanic and Blast Furnace cement. It is also compatible with cements containing fly ash and microsilica.

Compatibility With Other Admixtures

P4 should not be premixed with other admixtures. The performance of the material may be affected by the presence of other chemicals. It is advisable to add all admixtures separately to a cementitious mix.

Method of Use

P4 is supplied ready for use. It should be added to concrete mixes during the mixing process, at the same time as the water or the aggregates. It should not be added directly to the cement. No extension of normal mixing time is necessary