WRDA® P59
Water reducer for economical concrete production with set time control
Product Description
WRDA® P59 is an aqueous solution of complex organic compounds combined with other chemicals which increase its beneficial effects on the quality and plasticity of a concrete mix. It does not contain calcium chloride. WRDA P59 is manufactured under rigid control which provides uniform, predictable performance. It is supplied as a clear yellow, low viscosity liquid, ready-to-use as received.
WRDA P59 water-reducing admixture is a ready-to-use low viscosity liquid which is factory premixed in exact proportions to minimise handling, eliminate mistakes and guesswork.
WRDA P59 is a chemical admixture meeting the requirements of the following chemical admixture specifications for concrete: ASTM C 494 as a Type A, Type D and Type G admixture; BS 5075: Part 1; GB 8076-1997.
One litre weighs approximately 1.09kg ± 0.02kg.
Applications
WRDA P59 produces a concrete with lower water content (typically 8 to 15% reduction), greater plasticity and higher strength. It is used in ready mix plants, block and concrete products plants, in lightweight and prestressed work, and wherever concrete is produced. It is also used by contractors in field equipment such as job site plants and pavers.
Compared to other water reducers, WRDA P59 will typically impart the following additional benefits:
- More controlled set time (minimal retardation over a wide range of dosages).
- Higher ultimate compressive and flexural strengths.
Advantages
Most calcium-chloride-free water-reducing admixtures on the market today produce some significant degree of set retardation. Minimal extension of setting time has been experienced in field concrete containing WRDA P59. Under closely controlled laboratory conditions, the retardation observed with the addition of 200 ml of WRDA P59 per 100 kg of cementitious material is in the range of 15 to 20 minutes, well within the limit of the accuracy of the test method. The use of WRDA P59 produces a plastic concrete that is more workable, easier to place, more pumpable, and has better finishability than plain or other admixtured concrete. In the hardened state, WRDA P59 concrete has higher compressive and flexural strengths at all ages than untreated or conventionally admixtured concrete.The greater degree of plasticity achieved, compared with conventional water-reducing admixtures, allows improved finishability.
Dispensing Equipment
Please contact your local GCP representative for further information regarding the dispensing equipment for this product
Packaging
WRDA P59 is available in bulk, and 205L drums. WRDA P59 contains no flammable ingredients. It will freeze at about -2˚C, but will return to full strength after thawing and thorough agitation.
Finishability
Finishers have stated that the cement paste, or mortar, in WRDA P59 admixtured concrete has improved trowelability. The influence of WRDA P59 on the finishability of lean mixes has been particularly noticeable. Floating and troweling, by machine or hand, easily imparts a smooth, close tolerance surface with less machine time and labour.
Addition Rates
Excellent results are typically obtained using addition rates of 200 to 600mL of WRDA P59 per 100kg of cementitious material (for dosage rates above 600mL / 100kg cementitious material, please consult your local GCP representative). In some cases it may be necessary to use higher addition rates due to variations in cement, aggregate or other job conditions
Compatibility with Other Admixtures
WRDA P59 is compatible in concrete with all air entrainers such as DARAVAIR® or DAREX® AEA® air-entraining admixtures. Due to a synergistic effect of WRDA P59, the quantity of air entrainer admixtured in concrete may be reduced by about 25%. By combining the separate effects of air entrainment and dispersion, the water requirement of concrete may be reduced up to 15%. Each admixture should be added separately. While WRDA P59 contains no calcium chloride, it is compatible with calcium chloride in concrete mixes. Again, each should be added separately.
Health and Safety
See WRDA P59 Material Safety Data Sheet or consult GCP Applied Technologies.
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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.
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GCP Applied Technologies Holdings (Thailand) Limited., 848 Moo 2, Bangpoo Industrial Estate (North), Phraksa Mai, Muang Samutprakarn, Samutprakarn 10280, Thailand
This document is only current as of the last updated date stated below and is valid only for use in Thailand. 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.th.gcpat.com. 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: 2023-07-07
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