ESE® Non-Chloride Early Strength Enhanding Additives
A Family of Non-Chloride Early Strength Enhancing Additives
The ESE® series of additives, which involve a newly developed modified alkanolamine, are available for use to enhance the early strength of cement. Unlike other early strength enhancers, ESE cement additives provide their performance benefit without the use of chloride or thiocyanate ions.
ESE products are available in a variety of formulations that are optimized to maximize their performance in different cement types and compositions. All products are also formulated to provide the benefits of traditional grinding aids such as increased grinding efficiency and reduced pack set of finished cement.
Covered by U.S. Patent 6,290,772 and 6,048,393
Product specifications for the most widely used ESE formulations are as follows:
Specifications for other ESE products are available through GCP Field Engineers.
The use of ESE cement additives has been shown to increase the early strength (1, 2 and/or 7 Days) of cement without the addition of chlorides, thereby allowing its use in cements already rich in chloride. ESE additives have performed in all types of cement, including Ordinary Portland and cements blended with slag, fly ash and/or limestone. Early strength (2 Days) increases of up to 22% (versus a blank) have been demonstrated in trials. The resultant high early strength can be used to meet specific market needs or, if desired, the cement producer can trade off the strength increase for reduced cement fineness and lower unit production costs. This in turn will result in production increases that can greatly benefit plants that are operating at or near their grinding capacity. Alternatively, the producer can choose to increase the amount of filler in the cement, while retaining the previous level of early strength.
The choice of any of these three options will result in incremental savings and/or revenue gains.
Application of ESE Cement Additives
Laboratory mill evaluations of clinker and other additions are recommended prior to field use in order to determine initial blend proportions, evaluate performance parameters and to enable GCP to formulate the most effective ESE product for the specific field use conditions. To arrange for a laboratory evaluation, contact your local GCP Field Engineer.
How to Use
ESE products are sprayed into the mill’s first compartment or added onto the clinker or feed conveyor belt. All additives should be accurately proportioned through a calibrated dosing system suitable for the cement mill and for the required output. GCP can provide advice on all types of dosing equipment, including manual, semiautomatic, automatic and computerized systems.
Recommended Addition Rate
According to GCP experience, the dosage of ESE ranges from 250-700 g/t of cement. The optimum addition rate of ESE cement additives should be determined through cement mill tests in consultation with GCP personnel.
ESE products should be protected from freezing. Once frozen, the product should be thawed out slowly and remixed thoroughly prior to use.
Shelf life is a minimum of 12 months if kept in manufacturer’s containers.
The performance of concrete admixtures and the physical properties of concrete are not adversely affected by the use of ESE additives in cement production. ESE additives, and cement treated with ESE additives, are compatible with all commercial concrete admixtures, including air entrainers, water reducers, retarders and superplasticizers.
Case Study — Performance of ESE vs Traditional Chloride Containing Early Strength Enhancers
|Cement Type||I 52.5R||I 52.5R||% change|
|Chloride-based Quality Improver (kg/t)||1.300|
|ESE 242 (kg/t)||0.37|
|Blaine Fineness (cm2/gram)||4331||4290||-0.95|
|Mill Output (t/h)||50||51.7||3.4%|
|Specific Consumption (kWh/t)||62||60.1||-3.06|
|Compressive Strength (MPa): EN 196/1 mortar||Chloride Quality Improver||ESE 242||% change|
ESE products are carefully controlled and accurately blended for constant quality and optimum performance.
ESE products are ASTM C 465 approved for use in the USA.
ESE Early Strength Enhancing Additive is supplied in 210 L (55 gal) drums and ESE products may also be supplied in bulk in certain locations. It contains no flammable material.
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Last Updated: 2018-11-30