Grinding Aid/Pack Set Inhibitor
HEA2® is an aqueous solution of an amine acetate salt with the following specifications:
- Specific Gravity: 1.145 - 1.175
- Insolubles: 0.1% max.
- pH: 8 - 10
- Viscosity: 33 cps @ 21°C
- Foaming Tendency: None
HEA2® is one of the most effective dispersants yet developed for use as a grinding aid/pack set inhibitor for Portland cement and other hydraulic cements.
HEA2® greatly improves the efficiency of the grinding process by reducing the surface energy forces which cause agglomeration of the newly fractured cement particles. HEA2 is effective in both open circuit and closed circuit cement mills.
Increased mill output at same cement fineness:
More than 30 years of industrial HEA2 usage at cement plants in America, Europe and Asia-Pacific indicate the following typical production increases:
|Blaine Surface Area (cm2/gram)||Typical Mill Output Increase (%)|
2700 - 3100
8 - 15
3100 - 3500
10 - 20
3500 - 4000
12 - 25
4000 - 5000
15 - 30
20 - 40
Reduced grinding costs:
The increased mill output with HEA2® at same cement fineness and energy consumption provides savings through lower grinding costs per ton of cement.
Higher cement strengths:
ASTM test data shows that HEA2® significantly increases compressive and flexural strengths of cements, particularly at early ages. Increases as high as 25% are not uncommon; however the average for all tests , as well as for all ages is 10%.
Increased cement flowability:
The dry dispersive action of HEA2® results in vast improvements in cement flowability characteristics. A marked reduction of pack set or “silo set” is also noticeable for HEA2® treated cements.
The improved flowability of cements with HEA2® results in faster loading and unloading times of bulk tankers. Capacities of pneumatic conveying equipment are also increased.
A test method for assessing the pack set index (stickiness) of cements is available upon request.
Typical information establishing the correlation between pack set index and flowability of cement was shown in a study where pack set indices versus pumping rates, through a 1500 meter Fuller Kinyon line, were measured and compared.
|Pack Set Index||Pumping Rate in tons/hour|
Greater bulk density:
HEA2® increases the bulk density of cement by up to five percent, providing increased storage capacities of silos and bulk carriers.
Controlled set times:
Special HEA2® formulations designed to extend cement setting times are available through your GCP representative.
HEA2® may be dispensed as received. However, dilution with 5 parts water or more is recommended to ensure greater proportioning accuracy and better additive distribution. Suitable dispensing pumps with adjustable flow rates should be used for optimum performance. Diluted HEA2® may be added onto the clinker conveyor belt or sprayed into the mills first compartment.
HEA2® typical dosage rates will vary from 0.01% - 0.05% by weight of cement for Types I & II cements and 0.04% - 0.08% by weight of cement for Type III cements.
|Blaine Surface Area (cm2/gram)||HEA2 Dosage Rate % by weight of cement|
2700 - 3500
0.01 - 0.02
3500 - 4500
0.02 - 0.04
0.04 - 0.06
GCP grinding aids should be accurately proportioned through a calibrated dosing system, suitable for the cement mill and output required.
Approved for use under ASTM C 465 specification as a non-harmful processing addition, HEA2® has been thoroughly tested and is widely used in the cement industry.
HEA2® is supplied in 210 L (55 gal) drums, or in bulk by tanker trucks. It contains no flammable materials.
Protect from freezing. Once frozen, the product should be thawed out slowly and re-mixed thoroughly prior to use.
Field Engineers from GCP Products are available to assist in laboratory and mill test evaluations of HEA2®. Complete testing equipment and methods for analyzing mill performance and pack set index are also available during plant trials.
gcpat.com | North America Customer Service: 1 877-4AD-MIX1 (1 877-423-6491)
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.
HEA2 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.
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GCP Applied Technologies Inc., 2325 Lakeview Parkway, Suite 450, Alpharetta, GA 30009, USA
GCP Canada, Inc., 294 Clements Road, West, Ajax, Ontario, Canada L1S 3C6
This document is only current as of the last updated date stated below and is valid only for use in the United States. 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. 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: 2022-05-06