MORTARD® 79/5

Mortar Retarder

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Product Description

MORTARD® 79/5 is a liquid mortar retarder, designed for use in ready-mixed mortar. It has been specifically developed for cement / lime / sand mortars but is equally effective in cement / sand only mortars.

MORTARD® 79/5 is formulated from carefully selected raw materials and is manufactured under controlled conditions to give a consistent product complying with EN 934-3

Advantages

  • Enables controlled set retardation of mortars to be achieved.
  • Retardation can be produced up to a period of 1–3 days, if required.
  • Production of ready mixed mortar can be manufactured and delivered to sites for use at their convenience.

Typical Properties

MORTARD® 79/5
Appearance Amber Liquid
Specific Gravity (20°C) 1.165
Alkali Content (eq.Na20) 3.00%
Chloride Content Nil
Air Entrainment See “Addition Rates”
Freezing Point <-5⁰C

    Method Of Use

    MORTARD® 79/5 is supplied ready for use. It should be added to the mortar mix during the mixing process at the same time as the water or fine aggregate, but not directly onto cement. No extension of normal mortar mixing time is necessary. The amount of MORTARD® 79/5 required is dependent on the characteristics of the mortar constituents and the level of air entrainment required. Factors which affect this are:

    • Type and efficiency of the mixing equipment
    • Water content
    • Fine aggregate content, grading and type
    • Cement/lime content and type
    • Temperature

    Compatibility with Cements

    MORTARD® 79/5 can be used with most types of Portland cements. It is also effective in mortar containing fly ash or ground granulated blastfurnace slag. For use with special cements we recommend contacting GCP Applied Technologies.

    Compatibility with other Admixtures

    MORTARD® 79/5 should not be premixed with other admixtures.

    The performance of the product will be affected by the presence of other chemical admixtures. We recommend that all admixtures be added separately into the mix. It is essential that preliminary plant trials are performed so that
    the actual dosage rates can be determined, taking into account the contributing factors stated.

    Effects of Overdosing

    The effect of overdosing MORTARD® 79/5 is a function of the degree of overdose. Severe overdosing with MORTARD® 79/5 will result in excess retardation, which will manifest in prolonged “greenness” and slow development of the intrinsic strength of the mortar. The bonding of the mortar to the brick/blockwork may be adversely affected as the mortar may become desiccated prior to its set.

    Addition Rates

    Range 1000 ml - 3000 ml per 100 kg cement
    1.00%-3.00% (v/w) by wt. of cement
    As a guide to trials an addition rate of 1.0-2.0% volume by weight of cement is suggested.
    For advice and assistance with trials we recommend that you consult GCP Applied Technologies.

    Dispensing

    It is preferable that MORTARD® 79/5 should be introduced into the mixer by automatic dispensing equipment. Equipment or advice on dispensing can be obtained from GCP.

    Health and Safety

    For further information on Health and Safety matters regarding this product we recommend that you consult the relevant Material Safety Data Sheet from GCP. In line with general chemical handling precautions avoid contact with skin or eyes and protective gloves/goggles should be worn.

    Packaging and Storage

    MORTARD® 79/5 is supplied in 15 or 205 non returnable drums and 1,000 litre totes. Alternatively, bulk deliveries can be arranged. MORTARD® 79/5 should be stored in a cool, dry place protected from rain, extremes of temperature and sources of ignition.

    Storage Life in Manufacturer‘s Bags:
    12 months from date of manufacture.

    Technical Service

    Our Technical Service department of GCP Applied Technologies is available to assist you in the correct use of our performance chemicals.

     

    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.

    MORTARD 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 accurately reflect current trademark ownership or status.

    © Copyright 2020 GCP Applied Technologies Inc. All rights reserved.

    GCP Applied Technologies (UK) Ltd, Gate St, Dukinfield SK16 4RU.

    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/mortard-795