SPECIFICATION

ASTM C 494	Types A & D
CRD - C - 87	Types A & D
BS 5075	Part 1
Institute of Bau Technik	Type BV
IS	9103-79

DESCRIPTION
Perma Plast is a water reducing plasticiser for concrete. It is a product based upon refined lingo sulphonates.

PRIMARY USES
1)    To increase workability.
2)    To increase compressive strength.
3)    To effect cement economies.
4)    For hot weather concreting.

TYPICAL APPLICATIONS
1) In pre-stressed concrete.
2) In areas of congested reinforcement where high workability is beneficial.
3) In pre-cast concrete manufacture.
4) In concrete brick and block manufacture.
5) In hot weather concreting to extend workability.

ADVANTAGES
1) Increase workability - Significantly improves the
workability therefore ease of placing.
2) Improves the cohesive properties of the concrete helping to reduce segregation and bleeding.
3) Reduces water demand - Allows water reduction in the region of 10% to be achieved while maintaining workability, there by increasing strength, durability and impermeability.
4) Enables economies in the mix designs to be
achieved, therefore saving cement.

DIRECTIONS FOR USE
Perma Plast should be added to the concrete mix during the mixing cycle at the same time as the water. Never add Perma Plast to dry cement.

ACTION
Perma Plast is a powerful plasticiser which disperses and deffloculates the cement particles within a concrete mix. It can be used to improve workability, without the addition of extra water, or to allow reductions in free water content of the concrete mix.

DOSAGE
Field trials should be conducted to determine the optimum addition rates of Perma Plast. A dosage range of 140 cc to 280 cc per 50 kgs of cement is recommended as an initial starting point.

PROPERTIES
Typical properties of Perma Plast are as follows:

Colour	Dark brown/black Liquid
Specific gravity	1.20 at 25慢
All Entrainment	1% maximum dependent on grading of sand and water content.
Chloride Content	Nil
Nitrate Content	Nil
Freezing Point	0慢. . can be reconstituted if stirred after thawing
Flashpoint	None

COMPOSITION
A liquid admixture based upon refined lingosulphonates.

CAUTION
Over-dosage of Perma Plast will result in the following:
Retardation of initial set.
• Increase in air entrainment.
• Increase in workability. Provided concrete is properly cured, the ultimate strength of the concrete will not be adversely affected and will generally be higher than that of normal concrete.

COMPATIBILITY
Perma Plast can be used with all types of Portland cement including Sulphate resisting. For use with other special cements, contact your nearest Perma technical Office, or distributor. Perma Plast should not be pre-mixed with other admixtures. If other admixtures are to be used in concrete containing Perma Plast they must be dispensed separately.

HEALTH AND SAFETY
Perma Plast is not a health hazard or fire risk. Spillages should be washed immediately to avoid possibilities of slipping.

PACKING
Perma Plast is available in 2, 20 and 210 litres drum.

SHELF LIFE
Twelve months if stored in manufacturer’s original packing.