Cormix P4 is liquid concrete plasticiser and retarder or water reducing agent used to improve the workability of concrete mixes or to allow an effective reduction in free water content to be made. The effect is achieved by its absorption on to the surface of the cement particles in a concrete mix giving a powerful de-flocculating action.

Cormix P4 is formulated from carefully selected raw materials and is manufactured under controlled conditions to give a consistent product. It is based on a high grade, modified lignosulphonic and carboxylic acid derivative and depending on addition rate conforms to Type A and D materials of ASTM designation C494-81 and with BS5075 : Part 1, GB 8076 - 1997, BS 5075 Part 1, BS:EN934 - 2:1998, ASTM C1017 as Type 1 and Type 2.

Cormix P4 is used to produce workable and dense concrete in for example, dams, tunnels, runways, canals, reservoirs, ports, and marine structures etc. It is widely used in ready mix & site concrete.

Advantages Include

- Extension of slump in high temperatures.
- Workability improvement to most types of concrete mixes.
- Increased early compressive & flexural strengths.
- A 10-15% water reducing effect can be obtained.
- Reduced water without loss in workability.
- Can be used for pumped concrete.
- Effective in achieving cement economies.
- Extended setting times in high temperatures.
- Improves surface finishes.

Appearance: Dark brown liquid
Specific Gravity: Approx. 1.23
Air Entrainment: 1-2%
pH Value: Approx. 5
Chloride Content: Nil

Compatibility with Cements
Cormix P4 can be used with all types of Portland Cement, concrete containing fly ash, silica fume or G.G.B.F.S. For use with special cements we recommend that you consult Cormix.

Compatibility with Other Admixtures
Cormix P4 should not be premixed with other admixtures. The performance of the material may be affected by the presence of other chemicals and we would recommend that Cormix International be consulted in such circumstances.

Conmix 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.

DOSAGE
The performance of Conmix P4 is best assessed after preliminary tests on site using the actual concrete under consideration to determine the optimum dosage and effect on properties such as compressive strength, setting times, shrinkage etc., when these are of consequence. As a guide to these trials, an addition rate of 0.2-0.5% by weight of cement, is recommended. This rate of addition can be varied to give different results. For advice and assistance with your trials we would recommend that you consult Cormix.

EFFECTS OF OVER-DOSING
Over-dosing of Conmix P4 will cause an extension of initial setting time. If this happens consult Cormix. If intentional or accidental increases above the recommended addition rate are employed, care must be taken to allow for the
effect on the stripping of formwork. In such cases, however, provided the concrete is properly cured, the ultimate strength will generally by higher than for normal concrete.

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HEALTH & SAFETY

Conmix P4 is formulated from chemicals which present no fire or health hazards. Do not take internally. If on skin wash off with soap and water. If in eyes wash out with copious amounts of water and seek medical attention. For further information consult Cormix’s MSDS.