Synthetic fibre for concrete
Sinta™ M is a synthetic fibre for concrete, manufactured from 100% virgin polypropylene in a monofilament form. Sinta M is produced on a state-of-the-art production line which is specifically designed to yield an ultra thin concrete reinforcing fibre. 600g of Sinta M contains approximately 135 million individual fibres. Engineered specifically for use in concrete, it is alkali-resistant, non-absorptive and completely non-corrosive. Sinta M provides secondary reinforcement and protects concrete from stresses which cause cracking while the concrete is most vulnerable — during the first 24 hours after placement. Sinta M complies with European Standard BS EN 14889-2:2006 and ASTM Designation C 1116 Standard Specification for Fibre-Reinforced Concrete and Shotcrete, Type III Synthetic FibreReinforced Concrete or Shotcrete. Sinta M is available in 12mm or 19mm in length. It is also available in 6mm length for mortar mixes, to be used in plastering, screeding and patching.
Sinta M may be used in any application where the following benefits are desired:
- Decreased plastic shrinkage and cracking
- Improved concrete durability
- Increased fire resistance to explosive spalling
- As secondary reinforcement for crack protection and control
- Where extended finishing operations are required
- Where reduced use/ non-use of welded wire fabric is needed
Specifically applications include, but are not limited to, slabs on grade, elevated slabs, pavements, overlays, sloped walls, pools, shotcrete, stucco, precast and prestressed concrete products. Sinta M is not recommended to increase joint spacing or as a substitute for any reinforcement required by the Model Building Codes and Standards.
Sinta M uniformly distributes multi-dimensionally throughout the concrete mixture. The extremely high number of fibres in the fresh concrete matrix provides a high degree of secondary reinforcement. This reinforcement reduces the formation of all types of early cracking, protecting the concrete when its tensile strength is lowest. This cracking caused by plastic shrinkage, settlement, and other internal stresses would otherwise permanently weaken the resulting concrete. The concrete permeability is decreased, while surface characteristics, impact, and toughness properties are improved.
Mixing Requirements and Addition Rates
Sinta M may be added to concrete at any point during the batching or mixing process. Sinta M may be added to the aggregate during weighing or charging, or to the central mixer or truck before, during, or after charging. The concrete must be mixed at high speed for 5 minutes, or 70 revolutions, after the addition of Sinta M to ensure uniform distribution.
The standard range of addition for Sinta M is 300 to 1,800g / m3 of concrete. Typically 600g / m3 of Sinta M provides excellent results. Higher addition rates may be used when special properties are required.
Compatibility with Other Admixtures
Sinta M is compatible with all GCP admixtures. Its action in concrete is purely mechanical and will not affect the hydration process. Each admixture should be added separately.
Sinta M is available in convenient biodegradable ConcreteReadyTM Bags which are added to the truck drum or central mixer. The specially designed cellulose fibre bags disintegrate and disperse the fibres throughout the mix.
Health and Safety
See Sinta M Material Safety Data Sheet or consult GCP Applied Technologies.
|Modulus of Elasticity||3,445 MPa (500 ksi)|
|Alkali, Acid and Salt Resistance||High|
Technically advanced production techniques make Sinta M a highly durable fibre that is virtually invisible in fresh and hardened concrete. This minimises fibre-reinforced concrete finishing concerns while providing the highest level of crack protection available.
American Concrete Institute (ACI):
ACI 544.1 R “State of the Art Report of Fibre Reinforced Concrete”
ACI 302 “Guide for Concrete Floor and Slab Construction”
American Society of Testing and Materials (ASTM):
ASTM C 1116 “Standard Specification for Fibre-Reinforced Concrete and Shotcrete”
ASTM C 94 “Standard Specification for Ready-Mixed Concrete”
BS EN 14889-2:2006 Fibres for Concrete – Part 2: Polymer fibres – Definitions, specifications and conformity
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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.
Sinta and Concrete-Ready 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.
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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 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: 2021-02-05