Calcium Chloride 37

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Product Description

Calcium Chloride 37 is a set-accelerating admixture formulated to provide accelerated set during low ambient temperatures whilst increasing early and final strengths.

Calcium Chloride 37 is an aqueous liquid solution of inorganic Calcium Chloride that is manufactured under controlled conditions to produce a consistent product which ensures uniform and predictable performance when used.

Calcium Chloride 37 contains no Triethanolamine.

Advantages

  • Calcium Chloride 37 offers significant advantages as a concrete set accelerator.
  • Chloride 37 will reduce the setting time of concrete thus enabling earlier finishing times to be achieved, especially at low ambient temperature, when concrete temperatures are low. Finishing times can be reduced by up to 3 hours when Calcium Chloride 37 is used.
  • Calcium Chloride 37 will increase early and latter age compressive strengths. Early strengths can be increased by over 25% compared to non-accelerated concrete. Increased early strengths will enable the earlier removal of form work.
  • When Calcium Chloride 37 is used in concrete, that is designed with pozzolans such as fly ash and slag, acceptable finishing times and early strengths are achieved, thus optimising costs.

Product Advantages

  • Accelerated set times
  • Increases compressive strengths
  • Mix economics

Specification Type

Calcium Chloride 37 complies to the requirements of Australian Standard as:

  • 1478 Type Ac. (Appendix C4, class C (i))
  • ASTM C-494 Type C

Benefits

  • Controlled, predictable acceleration of set during low ambient temperatures.
  • Early form removal or early use of concrete.
  • Bleed reduction due to the greatly improved setting times.
  • Denser, less permeable concrete.
  • Effective over a wide range of cementitious contents and mix designs.
  • Used in conjunction with Type GB cements (and mixes that contain fly ash) to offset slow setting times.
  • Temperature of hot water used in winter mixes can be reduced to an optimum level.

Compatibility

Calcium Chloride 37 is compatible with all Portland cement systems, including fly ash, slag and limestone blends.

It is also compatible with all known admixture types currently available, but should be added to the mix separately, and not premixed prior to addition.

Addition Rates

Calcium Chloride 37 addition rate will normally range from 1,000 – 4,000mL / 100kg total cementitious, depending on mix properties required. In order to determine the optimum dose rate of Calcium Chloride 37, either on its own or in conjunction with other GCP admixtures, trials are recommended.

In general terms “1% Calcium Chloride” is achieved by using a dose of 2,000mL / 100kg total cementitious content and “2% Calcium Chloride” is achieved by using a dose of 4,000mL / 100kg total cementitious content.

Medthod of Use

Calcium Chloride 37 dose (mL / 100kg) NIL 500 1000
Initial Set (20°C) (Hr Min) 6-20 5-30 4-30
Initial Set (10°C) (Hr Min) 10-10 8-30 7-00
7 day Compressive Strengths (Mpa) 12.5 15.5 16.5
28 day Compressive Strengths (Mpa) 23.0 24.5 25.5

Calcium Chloride is a liquid admixture supplied ready to use. It can be added to the mix at the same point as the mix water.

Typical Applications

Calcium Chloride 37 can be used in virtually all concrete and masonry applications to achieve economic advantage, such as:

  • Flatwork and house slabs
  • Pumped concrete
  • Concrete floors poured inside on plastic with limited or no air flow
  • Concrete roads
  • Liquid Fill (DARAFILL® Applications)
  • Applications using Grace MicroFibers™.
  • Manufacture of concrete blocks, bricks, pavers and roof tiles

Dispensing Equipment

Please contact your local GCP representative for further information regarding the dispensing equipment for this product.

Chloride Ion

Calcium Chloride 37 contains a moderate level of chloride ion.

A dose of 1,000mL / 100kg total cementitious content will contribute 316 grams of Chloride.

Calcium Chloride 37 is not recommended in post-tensioned or pre-tensioned concrete, reinforced concrete with inadequate cover and concrete near marine environments.

DARASET® AF (a non-chloride accelerator) is available for these applications.

Packaging and Storage

Calcium Chloride 37 is delivered in 205L drums, 1,000L bulk boxes and by metered bulk tanker. Shelf life is minimum 12 months.

Safety Information

A Material Safety Data Sheet is available on request. Calcium Chloride 37 is not flammable.

Test Data

Cementitious content 310kg / m3
Type GP/fly ash (220/90)
Slump 80 mm

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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.

MicroFibers, DARASET and DARAFILL 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., 2325 Lakeview Parkway, Alpharetta, GA 30009, USA
GCP Australia Pty. Ltd., 14 Colebard Street West, Archerfield, Brisbane, Queensland 4108, Australia
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: 2023-07-06

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