TDA® Quality Improvers

A Family of Strength Enhancing Cement Additives

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Product Description 

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
TDA J 1.22 (±0.01) 6 - 8
TDA N 1.21 (±0.01) 8 - 10
TDA 710 1.34 (±0.02) 8 - 10
TDA 770 1.17 (±0.01) 8 - 10
TDA 1223 1.15 (±0.05) 6 - 8
TDA 7014 1.03 (±0.02) 9 - 12

Product specifications for other TDA formulations are available through GCP Field Engineers.

    Product Advantages 

    One of the key benefits of 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 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 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.

    Applications of TBA

    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 TDA product for each condition.

    Handling 

    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 TDA.

    Addition Rates 

    Dosage rates of 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 TDA product, but in all cases, the actual addition rate should be determined in cement mill tests.

    Dosing Equipment 

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

    Specification Compliance 

    TDA is approved for use under the ASTM C465 specification as a non-harmful processing addition for cement.

    Packaging 

    TDA is supplied in 210 L (55 gal) drums. 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 TDA. Complete testing equipment and methods for analyzing mill performance are also available during plant trials.

    Performance of Selected Products in the 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
    TDA J 1000–2500 1500 0-200 *** *** ** = *** */**
    TDA N 1000–2500 1500 100 *** ** *** (+) ** **
    TDA 710 1000–2500 1500 180-450 *** *** = (-) **** =
    TDA 770 1000–2500 1500 180 *** *** = (-) *** =
    TDA 775 1000–2500 1500 300 *** ** = (-) **** =
    TDA 1223 300–600 400 0 **** **** = (-) */** ***
    TDA 1227 1000–2000 1500 180 *** ***/**** = (-)/= **/*** **/***
    TDA 7014 150–400 250 0 **** **** = =/(-) */** ****
    TDA 7519 250–500 350 0 **** **** = =/(-) */** ****
    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 TDA vs a Competitive Product (in industrial tests)

    Objectives: TDA 7014 – Typical Performance Data

    Additive Product xyz TDA 7014 Product xyz TDA 7014
    Clinker 86% 86% 86% 86%
    Gypsum  5% 5% 5% 5%
    Limestone  9% 9% 9% 9%
    Cement Additive Dosage 0.20% 0.04% 0.18% 0.04%
    Mill number  3 3 3 3
    Mill Production 13.1 17.2 21.2 28.8
    Energy consumption (kWh/t) 62.8 47.7 38.7 28.5
    Blaine (cm2/g)  4200 3950 3530 3160
    40 µ residues 7.0 3.4 15.3 12.0
    Compressive Strength (MPa)
    1 Day    		 18.3 18.1 12.5 11.5
    Compressive Strength (MPa)
    3 Days    		 31.2 33.1 26.9 28.2
    Compressive Strength (MPa)
    7 Days    		 38.8 44.6 34.1 38.2
    Compressive Strength (MPa)
    28 Days    		 49.1 57.4 45.8 51.7
    Concrete Water/cement ratio 0.60 0.56 0.62 0.59
    Slump 16 16 17 17
    Compressive Strength (MPa)
    1 Day    		 9.9 10.2 8.4 8.2
    Compressive Strength (MPa)
    3 Days    		 - - - -
    Compressive Strength (MPa)
    7 Days    		 26.2 29.4 22.0 25.7
    Compressive Strength (MPa)
    28 Days    		 32.9 39.1 29.0 32.3

     

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    GCP Applied Technologies Inc., 2325 Lakeview Parkway, Alpharetta, GA 30009, USA
    GCP Italiana S.p.A. - Via Trento, 7 - 20017 Passirana di Rho, Milano, Italy
    Questo documento è aggiornato solo a partire dalla data dell’ultimo indicato di seguito ed è valido solo per l'uso in Italia. È importante consultare sempre le informazioni attualmente disponibili sull'URL.di seguito per avere le informazioni sul prodotto più recenti al momento dell'uso. Documenti aggiuntivi come i manuali di utilizzo, bollettini tecnici, disegni dettagliati e raccomandazioni dettagliate e altri documenti rilevanti sono disponibili anche su www.gcpat.fr. Le informazioni trovate su altri siti web non dovrebbero essere utilizzati, in quanto potrebbero non essere aggiornati o applicabili alle condizioni del tuo paese e non ci assumiamo alcuna responsabilità quanto al loro contenuto. In caso di conflitti o se hai bisogno di ulteriori informazioni, contatta il servizio clienti di GCP.

    Last Updated: 2022-11-24

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