EN 934-2 TABLE: 11.1 AND 11.3 AYDOSPER
Set retarding / high range water reducing / superplasticizing admixture

Admixtures for concrete; Material added during the mixing process of concrete in a quantity not more than 5 % by mass of the cement content of the concrete, to modify the properties of the mix in the fresh and /or hardened state. Set retarding / high range water reducing / superplasticizing admixture; admixture which produces the combined effects of a water reducing/plasticizing admixture (primary function) and a set retarding admixture (secondary function)

Description

Is a superplasticizing and setting retardant concrete admixture that preserves viscosity, improves the final strengths and significantly reduces the amount of water in any type of concrete for which it is necessary to maintain workability without increasing the amount of mixture water. When preferred under hot climatic conditions, it prolongs the workability duration of concrete and facilitates placements and surface finishes. It allows for continuous concrete pouring without cold joint formation.

 

Chemical Properties
EN 934-2 Çizelge 1 - General requirements

Characteristics	Specification	Test Method
Homogeneity	Homogeneous when used. Segregation shall not exceed the limit stated by the manufacturer.	AY-TA.001 Visual
Color	Uniform and similar to the description declared by the manufacturer.	AY-TA.001 Visual
Relative Density	D ± 0.03 if D > 1,10 D ± 0.02 if D ≤ 1,10 Where D is the manufacturer's stated value of density.	TS 781 ISO 758
pH Value (20 0 C)	Manufacturer's stated value ± 1 or within manufacturer's stated range.	TS 6365 EN 1262
Dry Content (%)	0.95 T ≤ X < 1.05 T, if T ≥ 20 % 0.90 T ≤ X < 1.10 T, if T < 20 % T is manufacturer's stated value % m/m.; X is test result % by mass on dry material content.	TS EN 480-8
Chloride Content (%)	Either ≤ 0.10 % by mass or not above the manufacturer's stated range.	TS EN 480-10
Alkali Content (%)	Not above the manufacturer's stated maximum.	TS EN 480-12
Effective Component (%)	Infrared spectra to show no significant change with respect to the effective component when compared to reference spectrum provided by the manufacturer.	TS EN 480-6
Freezing Point (%)	Not above the manufacturer's stated maximum.	AY-TA.011
Corrosion Behavior	Contains only components according to EN 934-1:2008, Annex A.1
Dangerous Substances	Comply with annex ZA
Dosage	Dosage of contribution is based on the aggregate properties, water quality, concrete class, water-cement ratio and temperature of place.
Shelf Life	12 Months

 

Performance requirements
EN 934-2 Table 11.1 Specific requirements for set retarding/high range water reducing/super plasticizing admixtures (at equal consistence)

Essential Characteristics	Performance		Harmonised Technical Specification
Compressive strength	At 7 days	Test mix ≥ 100 % of control mix	EN 12390-3
	At28 days	Test mix ≥ 115 % of control mix
Setting time	Initial	Test mix ≥ control mix + 90 min	EN 480-2
	Final	Test mix ≤ control mix + 360 min
Water reduction	In test mix ≥ 12 % compared with control mix		EN 12350-2 EN 12350-5
Air content in fresh concrete	Test mix ≤ 2 % by volume above control mix unless otherwise stated by the manufacturer		EN 12350-7

 

EN 934-2 Table 11.2 Specific requirements for set retarding/high range water reducing/ super plasticizing admixtures (at equal w/c ratio)

Essential Characteristics	Performance	Harmonised Technical Specification
Retention of consistence	60 min after the addition the consistence of the test mix shall not fall below the value of the consistence of the control mix	EN 12350-2 EN 12350-5
Compressive strength	At 28 days Test mix ≥ 90 % of control mix	EN 12390-3
Air content in fresh concrete	Test mix ≤ 2 % by volume above control mix unless otherwise stated by the manufacturer	EN 12350-7

 

Areas Of Application

• • In production of ready-mix concretes where transportation to long distances is required under hot climatic conditions,
• • In eliminating loss of viscosity due to hot, windy and humid weather.
• • In concretes where it is desired to have excellent fluidity and maintain the viscosity,
• • In higher quality and stronger concretes.
• • In production of concrete with thin and compact reinforcements for difficult compacting,
• • In concretes that are required to have compact and smooth surface,
• • In production of concrete that are intended to be impervious,
• • In architectural concrete, engineering and artistic structures,
• • Construction elements in different geometries which require complex and detailed molds,
• • In precast and prefabricated concrete production,
• • Used in production of ready-mix concrete.

 

Properties / Advantages

• • Does not require readjusting the viscosity of concrete by preserving the viscosity for prolonged periods of time during summer months.
• • Prevents the concrete from losing its viscosity fast, provides for extended viscosity protection depending on the type of cement used.
• • Allows for achieving high unit weight and strength.
• • Ensures achieving less porous and less pervious concretes with a good surface appearance.
• • Allows for easy placement and faster strengthening, saves on workmanship and ensures earlier molding / mold turnover.
• • Reduces carbonation rate of concrete, improves its mechanical properties such as shrinkage and creep.
• • Ensures pumping of the concrete to long distances.
• • Significantly improves the early high strength.
• • Significantly reduces the mixing water of concrete.
• • Considerably increases early and final strength of concrete.

Application / Warning

• • Isused by adding into the mixture water of concrete or directly mixing into the fresh low-slump concrete.
• • Should not be directly added onto the dry mixture.
• • After adding 70% of the water to be added into the mixture,
• • Should be mixed with the remaining water and then added into the mixture.
• • In case of directly adding into the fresh concrete, the mixing time should be prolonged for minimum 1-2 minutes at high speed and such mixing time should be determined during laboratory tests.
• • Concrete components may differ by their structures. The admixture to be added into the mixture to prevent segregation of the concrete should be applied in the suitable doses. Prior tests should be performed to check whether the admixture is suitable for the design of a certain concrete.
• • In case of using the admixture in the amount exceeding the specified use range, the setting time of the concrete may be prolonged. In such cases, the concrete should be kept humid to allow for curing until it hardens.
• • does not contain chloride or any other components that result in corrosion in the reinforcements. Therefore, it is suitable for use in reinforced concrete structures.
•  

Suitability

• • Suitable for use with all types of concretes with or without admixtures.
• • In case it is desired to use high amounts of cements, it is used along with mineral additives such as fly ash, micro silica and cinder.
• • In order to increase the freezing-thawing resistance, it is used together with air entraining
• • It is not recommended to use the product together with products that contain polycarboxylate.
• • Products that contain polycarboxylate.
• • The product is used together with Concrete antifreeze in order to speed up the setting time by increasing the hydration temperature of concrete under cold weather conditions.
• • The product is used together with Stabilizer at worksites in order to increase viscosity of concrete.
• • At high temperatures and in case of drafts, make sure to prevent the mixture water within the concrete from evaporating. At the curing stage, curing may be used to prevent fast evaporation of the humidity within the concrete and formation of cracks.
• • Steel, polypropylene and organic fibers may be used against shrinkage cracks.
• • It is recommended to perform tests prior to using the products.
• • In case of mixing with other admixtures, the performance of the product decreases.
• • Admixtures should not be stored by mixing together.
• • Mixing and storage equipment should be properly cleaned

Storage/Shelf Life

Original, unpacked and undamaged products (drums, barrels, containers IBC) should be stored away from direct sunlight and frost at temperatures from +5ºC to +35ºC. In case the product is stored in an unsuitable environment and it freezes, the product should be thawed at ambient temperature without using direct heat and should be stirred using mechanical methods until it is homogenous. When stored under suitable conditions, the shelf life of the product is 12 months from the date of production.

 

Health and Safety

Please use protective clothing, protective gloves, full goggles and a face mask according to Occupational Health and Safety Regulation. Avoid contact with skin and eyes. In case of contact, rinse with plenty of water. In case of digestion, please seek medical attention. For transportation, storage, disposal of the product, its physical, ecological, toxicological information and other details and recommendations please refer to the Safety Data Sheet of the product.