Product Description
OPTEVA™ TDA® Quality Improvers are a family of cement additives that improve the strength or other performance characteristics of cement. They are aqueous compositions of grinding aids with set accelerating, water reducing or strength enhancing compounds, all carefully controlled and accurately blended for constant quality and optimum performance
Product specifications for the most widely used TDA® formulations are as follows:
| S.G. | pH | |
|---|---|---|
| OPTEVA™ TDA® J | 1.22 (±0.01) | 6 - 8 |
| OPTEVA™ TDA® N | 1.21 (±0.01) | 8 - 10 |
| OPTEVA™ TDA® 710 | 1.34 (±0.02) | 8 - 10 |
| OPTEVA™ TDA® 770 | 1.17 (±0.01) | 8 - 10 |
| OPTEVA™ TDA®1223 | 1.15 (±0.05) | 6 - 8 |
| OPTEVA™ TDA® 7014 | 1.03 (±0.02) | 9 - 12 |
Product specifications for other OPTEVA™ TDA® formulations are available through GCP Field Engineers.
Applications of OPTEVA™ TDA®
Laboratory mill evaluations of clinker and other additions are recommended to determine initial blend proportions, grinding efficiency, pack set index, mortar flow and compressive strengths of cements to enable GCP to formulate the most effective OPTEVA™ TDA® product for each condition.
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 Rates
Dosage rates of OPTEVA™ TDA® can differ significantly (from 0.03% to 0.3%) depending upon the particular formula being used. Field Engineers can provide an estimate of the optimal dosage for any individual OPTEVA™ TDA® product, but in all cases, the actual addition rate 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.
Product Advantages
One of the key benefits of OPTEVA™ TDA® additives is their ability to increase both the grinding efficiency and cement strengths to a degree unequalled by conventional grinding aids.
- Increased early and long-term compressive strengths for the production of better quality cements.
- 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. Additional advantages of OPTEVA™ TDA® additives include:
- 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.
Specification Compliance
OPTEVA™ TDA® is approved for use under the ASTM C465 specification as a non-harmful processing addition for cement.
Packaging
OPTEVA™ TDA® is supplied in 210 L (55 gal) drums. OPTEVA™ TDA® may also be supplied in bulk in certain locations. It contains no flammable materials.
Storage
Protect from freezing. However, if freezing should occur, 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 are available to assist in laboratory and mill test evaluations of OPTEVA™ TDA®. Complete testing equipment and methods for analyzing mill performance are also available during plant trials.
Performance of Selected Products in the OPTEVA™ TDA® Family
| Products | Typical Range g/t | Typical Dosage g/t | Contribution to Cement Cl g/t | Cement Flowability Packset | Grinding Aid | Water Demand | Setting Time | Compressive Strength 1-3 Days | Compressive Strength 28 Days |
|---|---|---|---|---|---|---|---|---|---|
| OPTEVA™ TDA® J | 1000–2500 | 1500 | 0-200 | *** | *** | ** | = | *** | */** |
| OPTEVA™ TDA® N | 1000–2500 | 1500 | 100 | *** | ** | *** | (+) | ** | ** |
| OPTEVA™ TDA® 710 | 1000–2500 | 1500 | 180-450 | *** | *** | = | (-) | **** | = |
| OPTEVA™ TDA® 770 | 1000–2500 | 1500 | 180 | *** | *** | = | (-) | *** | = |
| OPTEVA™ TDA® 775 | 1000–2500 | 1500 | 300 | *** | ** | = | (-) | **** | = |
| OPTEVA™ TDA® 1223 | 300–600 | 400 | 0 | **** | **** | = | (-) | */** | *** |
| OPTEVA™ TDA® 1227 | 1000–2000 | 1500 | 180 | *** | ***/**** | = | (-)/= | **/*** | **/*** |
| OPTEVA™ TDA® 7014 | 150–400 | 250 | 0 | **** | **** | = | =/(-) | */** | **** |
| OPTEVA™ TDA® 7519 | 250–500 | 350 | 0 | **** | **** | = | =/(-) | */** | **** |
| OPTEVA™ TDA® 7525 | 1000–2500 | 1500 | 0-150 | *** | *** | **** | =/(+) | * | = |
Indication based on Typical Performance = Unchanged (-) Decrease (+) Increase * Improvement ** Good Improvement *** Strong Improvement **** Very Strong Improvement
Comparative Results of the Efficiency of OPTEVA™ TDA® vs a Competitive Product (in industrial tests)
Objectives: OPTEVA™ TDA® 7014 – Typical Performance Data
| ADDITIVE | PRODUCT XYZ | OPTEVA™ TDA® 7014 | PRODUCT XYZ | OPTEVA™ TDA® 7014 |
|---|---|---|---|---|
| Cement Composition | ||||
| Clinker Gypsum Limestone Cement Additive Dosage |
86% 5% 9% 0.20% |
86% 5% 9% 0.04% |
86% 5% 9% 0.18% |
86% 5% 9% 0.04% |
| Mill number Mill Production Energy consumption (kWh/t) Blaine (cm2/g) 40 µ residues |
3 13.1 62.8 4200 7.0 |
3 17.2 47.7 3950 3.4 |
3 21.2 38.7 3530 15.3 |
3 28.8 28.5 3160 12.0 |
| Compressive Strength (MPa) | ||||
| 1 Day 3 Days 7 Days 28 Days |
18.3 31.2 38.8 49.1 |
18.1 33.1 44.6 57.4 |
12.5 26.9 34.1 45.8 |
11.5 28.2 38.2 51.7 |
| Concrete | ||||
| Water/cement ratio | 0.60 | 0.56 | 0.62 | 0.59 |
| Slump | 16 | 16 | 17 | 17 |
| Compressive Strength (MPa) | ||||
| 1 Day 3 Days 7 Days 28 Days |
9.9 - 26.2 32.9 |
10.2 - 29.4 39.1 |
8.4 - 22.0 29.0 |
8.2 - 25.7 32.3 |
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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.
OPTEVA TDA 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 2018 GCP Applied Technologies, Inc. All rights reserved.
GCP Applied Technologies Inc., 62 Whittemore Avenue, Cambridge, MA 02140, USA
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Last Updated: 2019-04-10
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