WRDA® P9
Mid-Range Concrete Plasticiser
Product Description
WRDA® P9 is a liquid concrete plasticiser, or water-reducing agent, used to improve workability of concrete, or permit effective reductions in free water content. It is an extremely versatile product, producing excellent slump retention properties, over a wide range of cement contents.
WRDA® P9 is effective over a wide range of dosage levels, giving the desired effect in concrete without producing any detrimental retardation results.
WRDA® P9 is formulated from carefully selected raw materials and is manufactured under controlled conditions to give a consistent product. It is based on a high performance lignosulphonic acid derivative and depending on dosage rate, WRDA® P9 meets the requirements of Type A and D materials of ASTM designation C-494 and complies with EN 934-2.
Product Advantages
- WRDA® P9 can be utilised to modify concrete mix designs to give improved slump retention and allow more time for placement and compaction.
- Permits excellent water reduction, resulting in improved concrete strengths and durability.
- Effective over a wide range of cement contents
- At both low and high addition rates, WRDA® P9 exhibits excellent retention of workability while giving limited set retardation properties. This is particularly prominent under hot weather conditions.
- WRDA® P9 aids cohesion, especially when harsh mixes are used. This improves the surface finish of the concrete.
- Reduces bleeding and enhances the pumpability characteristics of the concrete.
- Effective over a wide range of dosage levels producing moderate to high compressive strength increases
Typical Properties
| Appearance | dark brown liquid |
| Specific Gravity | 1.20 at 20°C |
| Air Entrainment | Air content will normally be increased by between 1% and 2%. |
| Chloride Content | Nil |
| Freezing Point | 0°C |
Method of Use
WRDA® P9 is supplied ready for use. It should be added to concrete mixes during the mixing process, at the same time as the water. It should not be added directly to the cement. No extension of normal mixing time is necessary.
Compatibility with Cements
WRDA® P9 can be used with all types of Portland, Pozzolanic and blast furnace cements. It can also be used with concrete containing fly ash and silica fume.
Compatibility with other Admixtures
WRDA® P9 should not be premixed under any circumstances with other admixtures. While some admixtures can be usefully combined within the same mix the performance of this product may well be affected by the presence of other chemicals and we recommend that GCP Applied Technologies be contacted for advice in all such circumstances.
Addition Rates
Range: 0.2%–1.2% volume by weight of cement
The performance of WRDA® P9 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 ultimate compressive strength, early rates of strength, and shrinkage when these are of consequence.
As a guide to these trials, an addition rate of 200 ml–1200 ml WRDA® P9 per 100 kg cement is recommended.
Effects of Overdosing
Overdosing of WRDA® P9 will generally produce a considerable increase in workability and in certain circumstances, a slight increase in air content. This particularly in cold weather will be accompanied by retardation of the initial and final set characteristics of the concrete. In such cases, however, provided the concrete is properly cured, the ultimate strength will generally be higher than that of normal concrete. The effects of overdosing will also be exaggerated when sulphate resisting cement is used to produce the concrete.
Dispensing
It is preferable that liquid admixtures for concrete should be introduced into a mixer by means of automatic dispensing equipment details of which are available upon request.
Health and Safety
For further information see WRDA® P9 SDS (Safety Data Sheet) or consult GCP.
Packaging
WRDA® P9 is supplied in nominal 210 litre free, non-returnable containers.
Alternatively, 1000 litre IBCs or bulk deliveries can be arranged.
Storage
WRDA® P9 should be stored in original containers or suitable closed tanks, preferably out of direct sunlight and protected from extremes of temperature.
Storage Life in Manufacturer’s Drums:
12 months from the date of manufacture
Storage Life in Bulk Storage:
12 months from the date of delivery
Technical Service
The Technical Service Department of GCP is available to assist you in the correct and best use of our products. These resources and advice are at your disposal entirely without obligation. Please contact:
GCP
Emirates Chemicals LLC
Festival Tower, Suite 1701
Dubai Festival City
P.O. Box 5006
Dubai, United Arab Emirates
Tel: +971 4 2329901
Fax: +971 4 2329940
Email: meinfo@grace.com
gcpat.ae | United Arab Emirates customer service: +971 4 5139560
We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate, and is offered for consideration, investigation and verification by the user, but we do not warrant the results to be obtained. Please read all statements, recommendations, and suggestions in conjunction with our conditions of sale, which apply to all goods supplied by us. No statement, recommendation, or suggestion is intended for any use that would infringe any patent, copyright, or other third party right.
WRDA is a trademark, which may be registered in the United States and/or other countries, of GCP Applied Technologies Inc. This trademark list has been compiled using available published information as of the publication date and may not accurately reflect current trademark ownership or status.
© Copyright 2018 GCP Applied Technologies Inc. All rights reserved.
GCP Applied Technologies Inc., 2325 Lakeview Parkway, Alpharetta, GA 30009, USA
P. O. Box 5006, Office 2104, 21 Floor, The Exchange Tower, Opp. JW Marriott Marquis Hotel, Business Bay, Dubai – United Arab Emirates
This document is only current as of the last updated date stated below and is valid only for use in the UAE. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on www.gcpat.ae. Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.
Last Updated: 2022-11-18
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