STRUX® 85/50

Synthetic macro fibre reinforcement

Product Description

STRUX® 85/50 synthetic macro fibre reinforcement is a unique form of high strength, high modulus synthetic macro reinforcement that is distributed throughout the concrete matrix. It consists of synthetic macro fibres 50mm (2in.) in length that have specifically been designed to ensure ease of use and rapid dispersion in concrete. STRUX® 85/50 is used in concrete to improve the material properties including toughness (post crack energy absorption), impact and fatigue resistance.

Product Advantages

  • Ductility
  • Durability
  • Crack control
  • Energy absorption
  • Stain-free concrete surfaces
  • Quick, easy and safe application
  • Efficient and cost-effective secondary reinforcement alternative


STRUX® 85/50 can be used in a variety of ready mix and precast applications including bridge decks, overlays, whitetopping, pipes, vaults, septic tanks, tunnel linings, slope stabilisation, and swimming pools.


When added to concrete, the primary benefit of STRUX® 85/50 is a significant improvement in flexural toughness.

Addition Rates

STRUX® 85/50 addition rates are dependent on the specific application and desired properties and will typically vary between 1.5 and 8.0kg / m3.

Mix Design and Mixing Requirements

The utilisation of fibres generally requires the use of a superplasticiser such as ADVA® to restore the required workability to fibre-reinforced concrete. STRUX® 85/50 may be added to concrete at any point during the batching or mixing process. STRUX® 85/50 should be added at a maximum rate of one bag every 30 seconds. After fibre addition the concrete should be mixed at the recommended mixing speed for a minimum of 70 revolutions to ensure adequate fibre dispersion. Please contact your local GCP representative with any questions.


STRUX® 85/50 is compatible with all admixtures from GCP Applied Technologies. Their action in concrete is mechanical and will not affect the hydration process of the cement and therefore will not affect the compressive strength. Each liquid admixture should be added separately to the concrete mix.

Health and Safety

See STRUX® 85/50 Material Safety Data Sheet or consult GCP Applied Technologies. | United Kingdom customer service: +44 (0) 1480 478421

Australia 1800 855 525 New Zealand +64 9 448 1146 China Mainland +86 21 3158 2888 Hong Kong +852 2675 7898 India: Chennai +91 44 6624 2308 Manesar +91 124 488 5900 Indonesia +62 21 893 4260 Japan +81 3 5226 0231 Korea +82 32 820 0800 Malaysia +60 3 9074 6133 Philippines +63 49 549 7373 Singapore +65 6265 3033 Thailand +66 2 709 4470 Vietnam +84 8 3710 6168

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.

STRUX and ADVA are trademarks, 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., 62 Whittemore Avenue, Cambridge, MA 02140, USA

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 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: 2020-01-16