WRDA® P7
Concrete Plasticiser
Product Description
WRDA® P7 functions by adsorbing onto the surface of the cement particles in a concrete mix, resulting in a powerful deflocculating action and hence a more uniform dispersion of cement grains throughout the mix. This in turn leads to a higher degree of lubricity and a consequential increase in workability.
WRDA® P7 is formulated from a carefully selected blend of both synthetic and naturally derived raw materials and is manufactured under controlled conditions to give a consistent product which depending on addition rate, WRDA® P7 meets the requirements of Type A and D materials of ASTM designation C-494 and complies with BS EN 934-2.
Typical Properties
| Appearance | dark brown liquid |
| Specific Gravity | 1.20 at 20°C |
| Air Entrainment | Increase in air content of concrete mixes is minimal and will rarely exceed 0.5%. |
| Chloride Content | Nil |
| Freezing Point | 0°C |
Method of Use
WRDA® P7 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 mix. No extension of normal mixing time is necessary.
Compatibility with Cements
WRDA® P7 can be used with all types of Portland, Pozzolanic and blast furnace cements. It can also be used with cement containing fly ash and silica fume.
Compatibility with other Admixtures
WRDA® P7 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: 0.16%–0.7% volume by weight of cement
WRDA® P7 is a versatile, high performance product which gives benefits in a wide variety of applications.
As with most products of this type, the magnitude of the effect obtained with WRDA® P7 is governed within limits by the quantity of product used and the specific nature of the concrete under consideration. It is therefore necessary to assess performance under site conditions, bearing in mind the particular requirements of the situation in order to determine the optimum dosage.
As a guide to these trials, an addition rate of 160 ml–700 ml WRDA® P7 per 100 kg cement is recommended.
Effects of Overdosing
Overdosing of WRDA® P7 will generally produce a considerable increase in workability and in certain circumstances, a slight increase in air entrainment. This particularly in cold weather will be accompanied by a retardation of the initial and final set of the cement. In such cases, however, provided the concrete is properly cured the ultimate strength will generally be higher than for normal concrete.
The effects of overdosing will also be exaggerated when sulphate resisting cement is used in place of ordinary Portland cement.
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 on request.
Health and Safety
For further information see WRDA® P7 SDS (Safety Data Sheet) or consult GCP
Packaging
WRDA® P7 is supplied in nominal 210 litre, non-returnable containers.
Alternatively, bulk deliveries can be arranged.
Storage
WRDA® P7 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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