OPTEVA® TDA®

Product Description

OPTEVA® TDA® additives are aqueous compositions of grinding aids with set-accelerating, water-reducing, and strength-enhancing compounds, all carefully controlled and accurately blended for constant quality and optimum performance.

Product specifications for the most widely used OPTEVA® TDA® formulations are as follows:

_{Product specifications particular to other OPTEVA® TDA® formulations are available through GCP Field Engineers.}

Applications

Laboratory mill evaluations of clinker and other additions are recommended to determine initial blend proportions, grinding efficiency, pack set index, mortar flow, compressive strengths of cements and to enable GCP Applied Technologies to formulate the most effective OPTEVA® TDA® product for each condition.

Product Advantages

One of the key benefits of OPTEVA® TDA® additives is their ability to increase both grinding efficiency and cement strengths to a degree unequaled by conventional grinding aids.

• Increased early and long-term compressive strengths
• Reduced cost of cement production through reduced unit grinding costs and through replacement of clinker with reactive additions such as pozzolans, blast furnace slag and fly ash, or with fillers such as limestone.
• The chemical action of OPTEVA® TDA® additives decreases the interparticle attraction between cement grains both in dry form and in water, and increases the rate of hydration of cements.
• Increased grinding efficiency resulting in increased mill output, higher cement fineness and reduced unit power input and grinding costs.
• Increased workability (flow) of cement mortars and concretes. Increased cement flowability for reduced pack set or “silo set” of cements, resulting in lower handling costs and reduced waste.

Handling

OPTEVA® TDA® additives are sprayed into the mill’s first compartment or added onto the clinker conveyor belt. Suitable dispensing pumps with adjustable flow rates should be used for accurate dosing and for optimum performance of OPTEVA® TDA® .

Addition Rate

Excellent results are usually obtained with OPTEVA® TDA® addition rates of 0.10% to 0.30% by weight of cement. Lower rates of addition also have produced satisfactory results when cement formulations have been particularly responsive to the additive.

The optimum addition rate of OPTEVA® TDA® should be determined in cement mill tests.

Dosing Equipment

OPTEVA® TDA® additives should be accurately proportioned through a calibrated dosing system, suitable for the cement mill and output required.

Specification Compliance

OPTEVA® TDA® is approved for use under ASTM C 465 specification as a non-harmful, processing addition for cements.

Packaging

OPTEVA®  TDA®  is supplied in 210L drums. OPTEVA® TDA® may also be supplied in bulk in certain locations. It contains no flammable materials.

Storage

Protect from freezing. Once frozen, the product should be thawed out slowly and re-mixed thoroughly prior to use. Shelf life is minimum 12 months in manufacturer’s containers.

Technical Services

Field Engineers from GCP Applied Technologies are available to assist in laboratory and mill test evaluations of OPTEVA® TDA® . Complete testing equipment and methods for analysing mill performance are also available during plant trials.

OPTEVA® TDA® vs Current Grinding Aids