DARACEM® 205
High Performance Concrete Superplasticizer
Product Description
DARACEM® 205 is a liquid concrete superplasticiser that has been developed to allow concrete to attain particularly high performance in both the plastic and hardened states. It is particularly useful for imparting extreme workability to concrete mixes so that large or difficult pours can be made.
Alternatively, DARACEM 205 can be utilized to effect large water reductions to achieve high early and subsequent strength. DARACEM 205 is an extremely powerful deflocculating agent and performs by dispersing cement into its primary particles dramatically increasing flow characteristics of the cement paste. Main applicational areas are:
High quality concrete for durable structures.
Reinforced and pre-stressed precast elements.
Bridge deck slabs.
Precast or in-situ structures. DARACEM 205 conforms to the requirements of:
EN 934 Part 2 UNI
EN 934-2
BS 5075 Part 3
ASTM C 494 Type A and F.
Technical Data
| DARACEM 205 | |
| Appearance | dark brown liquid |
| Specific Gravity | ca. 1.20 at 20°C |
| Chloride content | nil |
| Storage life | 12 months from the date of manufacture |
Advantages
- High compressive strength concrete especially at early ages
- Low w/c ratio, excellent durability
- Good surface finish, providing highly aesthetic concrete appearance
- Plastic concrete exhibits high cohesion, fluidity and flowability
- Savings in energy consumption when steam curing is employed
Method of Use
DARACEM 205 is supplied ready for use, and should be added to concrete mixes either during the mixing cycle or at the same time as the water, or alternatively it should be added in its supplied form to a normal concrete mix a few minutes before the pour is made. In the latter case a mixing cycle of at least 2 minutes should be provided to ensure complete dispersion
Compatibility With Cements
DARACEM 205 is compatible with all Portland, pozzolanic and blast furnace cements. It is also compatible with concrete containing fly ash and or silica fume.
Compatibility With Other Admixtures
DARACEM 205 is compatible with all GCP Applied Technologies admixtures and particularly can be used in conjunction with airentraining agents. It is advisable to add all admixtures separately to a cementitious mix.
Addition Rates
Range: 0.8%–3.0% by weight of cement (800 g–3000 g per 100 kg cement)
The optimum dosage is assessed after preliminary trials depending upon the actual mix constituents and specifications required.
Effects of Overdosing
Serious overdosing of DARACEM® 205A will generally produce a concrete mix of even greater workability, set retardation and a slight increase in air entrainment may be noticed. In SRC mixes and in cooler weather, set retardation will be further increased. If intentional or accidental increases above the recommended addition rates are encountered, care must be taken to allow for the effect on the stripping time of formwork. In such cases, however, provided the concrete is properly cured the ultimate strength will generally be higher than for normal 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 can be supplied upon request.
Health and Safety
For further information see the DARACEM 205A SDS (Safety Data Sheet) or consult GCP.
Packaging
DARACEM 205A is supplied in 210 litre, non-returnable containers.
Alternatively, 1000 litre IBCs or bulk deliveries can be arranged.
Storage
DARACEM 205 should preferably be stored protected from frost. If the product does become frozen it should be carefully mixed after thawing out to restore it to its normal state.
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.uk | United Kingdom customer service: +44 (0) 1480 478421
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.
DARACEM 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 accura.
© Copyright 2018 GCP Applied Technologies Inc. All rights reserved.
This document is only current as of the last updated date stated below and is valid only for use in the United Kingdom. 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.uk. 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: 2022-11-24
https://gcpat.uk/en-gb/solutions/products/daracem-205