WRDA® 35
Concrete Plasticiser
Product Description
WRDA® 35 is a high performance liquid concrete plasticiser or water-reducing agent used to improve the workability of concrete mixtures or to permit effective reductions in free water content. It can be used especially in hot weather conditions, where a delayed set will allow sufficient delivery and placement times.
WRDA 35 is extremely versatile in application and is effective over a wide range of mix designs from low through to high cement contents and by virtue of its water reducing properties can also be used to reduce the permeability of concrete.
WRDA 35 is formulated from a blend of both synthetic and naturally derived raw materials and is manufactured under controlled conditions producing a consistent product.
It meets the requirements of ASTM C-494 Type D and BS EN 934-2.
Typical Properties
| Appearance | dark brown liquid |
| Specific Gravity | 1.20 at 20°C |
| Air Entrainment | Minimal, concrete mixes will normally be increased by 1%–2%. |
| Chloride Content | Nil |
| Freezing Point | 0°C |
Product Advantages
- Can be used to extend workability, thus allowing concrete to be placed and compacted adequately.
- Strength increases at all ages, can be obtained by utilization of the effective water reduction capabilities.
- Improved permeability and reduced shrinkage in hardened concrete.
- Improves finish and compaction.
- Allows the concrete to be more cohesive providing less segregation and bleeding effects.
Method of Use
WRDA 35 is supplied ready for use and should be added to the concrete mixes during the mixing cycle at the same time as the mixing water. It should not be added directly to the cement. Extension of normal mixing time is not usually necessary.
Compatibility with Cements
WRDA 35 can be used with all types of Portland cement including sulphate resisting cements. It can also be used in concrete mix designs containing pulverised fly ash and blast furnace slag.
Compatibility with other Admixtures
WRDA 35 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: 0.20%–1.0% volume by weight of cement
The performance of WRDA 35 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 (early and ultimate) shrinkage, air content, setting times etc., when these are of consequence.
WRDA 35 is a versatile high performance product that is of benefit to a wide variety of applications. As with most products of this type, the level of effect of WRDA 35 is governed within limits by the quantity of product used and the specific nature of the concrete mixture.
As a guide to trials, addition rates of 0.4% by weight of cement should be initially evaluated.
Higher dosages should be used for concrete subjected to high ambient temperatures.
Effects of Overdosing
Serious overdosing of WRDA® 35 will generally produce a concrete with increased workability levels and in certain circumstances, an 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 slightly higher than that of normal concrete. The effects of overdosing will also be exaggerated when sulphate resisting cement is used to produce 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 35 SDS (Safety Data Sheet) or consult GCP.
Packaging
WRDA 35 is supplied in nominal 210 litre, non-returnable containers.
Alternatively, 1000 litre IBCs or bulk deliveries can be arranged.
Storage
WRDA 35 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
Product Description
WRDA® 35 is a high performance liquid concrete plasticiser or water-reducing agent used to improve the workability of concrete mixtures or to permit effective reductions in free water content. It can be used especially in hot weather conditions, where a delayed set will allow sufficient delivery and placement times.
WRDA 35 is extremely versatile in application and is effective over a wide range of mix designs from low through to high cement contents and by virtue of its water reducing properties can also be used to reduce the permeability of concrete. WRDA 35 is formulated from a blend of both synthetic and naturally derived raw materials and is manufactured under controlled conditions producing a consistent product. It meets the requirements of ASTM C-494 Type D and BS EN 934-2.
Product Advantages
- Can be used to extend workability, thus allowing concrete to be placed and compacted adequately.
- Strength increases at all ages, can be obtained by utilization of the effective water reduction capabilities.
- Improved permeability and reduced shrinkage in hardened concrete.
- Improves finish and compaction.
- Allows the concrete to be more cohesive providing less segregation and bleeding effects.
Typical Properties
| Appearance | dark brown liquid |
| Specific Gravity | 1.20 at 20°C |
| Air Entrainment | Minimal, concrete mixes will normally be increased by 1%–2%. |
| Chloride Content | Nil |
| Freezing Point | 0°C |
Method of Use
WRDA 35 is supplied ready for use and should be added to the concrete mixes during the mixing cycle at the same time as the mixing water. It should not be added directly to the cement. Extension of normal mixing time is not usually necessary.
Compatibility with Cements
WRDA 35 can be used with all types of Portland cement including sulphate resisting cements. It can also be used in concrete mix designs containing pulverised fly ash and blast furnace slag.
Compatibility with other Admixtures
WRDA 35 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: 0.20%–1.0% volume by weight of cement
The performance of WRDA 35 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 (early and ultimate) shrinkage, air content, setting times etc., when these are of consequence.
WRDA 35 is a versatile high performance product that is of benefit to a wide variety of applications. As with most products of this type, the level of effect of WRDA 35 is governed within limits by the quantity of product used and the specific nature of the concrete mixture.
As a guide to trials, addition rates of 0.4% by weight of cement should be initially evaluated.
Higher dosages should be used for concrete subjected to high ambient temperatures.
Effects of Overdosing
Serious overdosing of WRDA® 35 will generally produce a concrete with increased workability levels and in certain circumstances, an 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 slightly higher than that of normal concrete. The effects of overdosing will also be exaggerated when sulphate resisting cement is used to produce 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 35 SDS (Safety Data Sheet) or consult GCP.
Packaging
WRDA 35 is supplied in nominal 210 litre, non-returnable containers.
Alternatively, 1000 litre IBCs or bulk deliveries can be arranged.
Storage
WRDA 35 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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