TYTRO® SA 520

Alkali-free, liquid, high-performance set accelerator for shotcrete

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Product Description

TYTRO® SA 520 is a high-performance, alkali-free set accelerator specifically formulated to provide high early strength at low dosage rates, and improve productivity by shortening the time of setting without compromising long-term strength and durability.

Uses

TYTRO SA 520 is used in all shotcrete applications where high early strength is required, and especially in the following applications:

  • Temporary and permanent rock support in tunnels
  • Underground rock support in mining
  • Slope stabilisation

Product Advantages

  • Efficient dosage rate – highly active formulation for lowest dosages
  • Reduced excavation downtime – increased adhesion and faster setting
  • Improved strength – increased early age strength development without compromising later age strength
  • Reduced cycle times – quicker setting action and increased layer thickness for overhead work
  • Minimum material waste – lower rebound and dust
  • Safer and healthier to handle – non-alkaline formulation
  • Robust and easy to formulate – liquid product, easily measured and dosed

Addition Rates

The dosage of TYTRO SA 520 can vary based on the type of application, mix design, cement type and content, W/C, temperature of the concrete, ambient temperature and temperature of the substrate on which the concrete is to be applied.

The dosage of TYTRO SA 520 normally ranges between 4% and 8% by the total weight of cementitious materials. Overdosing (>10%) may result in decreased final strength. Should conditions require using more than the recommended addition rates, please consult your local GCP representative.

GCP recommends that trials be performed before use to assess and optimise dosage rates and shotcrete performance. Predetermined and tested re-entry requirements are to be measured and nominated. If further assistance is required please consult your local GCP representative.

Properties

Form Liquid
Colour Clear
Density (g / cm3) 1.15 - 1.35
pH (25oC) 3 +/- 1
Chloride content <0.1%
Thermal stability 5°C to 35°C

Packaging

TYTRO SA 520 is available in 205L polyethylene drums and 1,000L totes. TYTRO SA 520 is also available in bulk, delivered by metred tank trucks on request.

Storage

Temperature

TYTRO SA 520 should be stored at a temperature range of 5ºC to 35ºC. It is recommended that TYTRO SA 520 be kept out of direct sunlight.

Compatibility

TYTRO SA 520 is compatible with all TYTRO® shotcrete admixtures. GCP recommends that a suitable superplasticiser and slump life controlling admixture be incorporated into the shotcrete mix to achieve extended working life and maintain low water-to-cementitious materials ratio. TYTRO® WR high range water-reducing and TYTRO® HC hydration control admixtures are recommended for this purpose.

Pretesting of the shotcrete mix should be performed before use and as conditions and materials change in order to ensure compatibility with other admixtures.

gcpat.com.au | Australia customer service: 1800 855 525

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.

TYTRO is an 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 2023 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 Australia. 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.com.au. 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: 2023-08-24

https://gcpat.com.au/en-gb/solutions/products/tytro-shotcrete-system/tytro-sa-520