PRODUCT DESCRIPTION AND USE

Benzoplast A 80 R is a modified polymer based, set retarding chemical admixture presenting normal and superplasticizing performance depending on the usage dosage.

Benzoplast A 80 R is recommended for use in the applications and purposes below:

For concrete casting in summer months.

Concretes to be transported to long distances.

For improving workability and placing of conventional fresh concrete.

For improving placing of concrete designed for slabs.

Ready-mixed concrete production.

Normal reinforced concrete elements such as column, shear wall and beam.

ADVANTAGES AND PROPERTIES

Benzoplast A 80 R is a modified polymer based, general-purpose chemical admixture designed for improving workability of fresh concrete without increasing water content and extending the setting time of fresh concrete.

Facilitates concrete placement during summer months with its set-retarding properties. It provides significant operational ease for projects requiring long-distance transportation

With its wide dosage range, it delivers the performance of both normal plasticizers and superplasticizers.

Benzoplast A 80 R presents normal plasticizer and super plasticizer performance with its broad-range dosage rates.

Usage of Benzoplast A 80 R in an appropriate dosage increases the flowability without causing segregation and provides easiness in mixing, transporting, placing and vibration works.

Provides the maximum comparability in fresh concrete with less vibration energy.

Enhances the durability and the ultimate strength of hardened concrete by achieving the target workability class in lower water to binder ratios..

Benzoplast A 80 R is an appropriate chemical admixture to use in mixtures containing mineral admixtures such as silica fume, fly ash and ground granulated blast furnace slag.

Does not contain chloride or any other substances that may cause corrosion.

APLICATION DETAILS, SAUGGESTIONS AND WARNING

Benzoplast A 80 R should be added to the mixing water or fresh concrete during mixing process. In case of an addition to fresh mixture, additional mixing time should be applied. Benzoplast A 80 R should not be added to the dry mixture.

As the dosage of the chemical admixtures is greatly influenced from cement type, properties of the concrete ingredients and mix design, it is recommended that the optimum dosage of admixture should be determined on trial batches.

Benzoplast A 80 R is generally compatible with the Portland cement types described in TS EN 197-1. In addition, it can be used in concrete mixes containing mineral admixtures such as silica fume, fly ash and ground granulated blast furnace slag.

There is no known incompatibility with the other type of chemical admixtures and can be used with the others in the same mixture. In case of the combined usage, the different types of chemical admixtures should not be mixed together and be used separately. Please contact R&D department of BENZEN for further information.

Overdose may cause segregation and excessive increase in setting time. In case of an excessive increase in setting time, protective measures should be applied against surface and/or shrinkage cracks and the fresh concrete surface should be kept wet.

Standard curing procedures and protective measures for fresh concrete should be followed.

Recommended Dosage:

The recommended dosage rate of Benzoplast A 100 R for general concreting operations is between 0.4 % - 1 % of the weight of binding material (cement + mineral admixture). The retarding time with the usage of Benzoplast A 100 R and the optimum dosage should be determined by trial batches. Please contact BENZEN R&D department for technical support.

PRODUCT DESCRIPTION AND USE

Benzoment HP 266 is a polycarboxylate based, high-range water reducer / superplasticizer type of chemical admixture with set retarding property for concrete.

Benzoment HP 266 is recommended for use in the applications and cases below:

Ready-mix concrete production requiring high workability and workability retention.

Concretes to be transported to long distances.

Concretes designed for heavily reinforced concrete structural sections.

Concrete design to meet given workability, strength and durability performance with minimum cement content.

ADVANTAGES AND PROPERTIES

Benzoment HP 266 provides more homogeneous distribution of cement particles mainly due to the steric effects of its side chains.

Reduces the agglomeration of cement particles and improves the flowability.

Provides significant increase in workability without increasing the quantity of mixing water and hence procures considerable convenience in mixing, transporting, placing and compaction of fresh concrete.

Set retarding property of Benzoment HP 266 provides advantage in hot weather conditions and concretes to be transported to long distances.

Improves the ultimate strength and durability by ensuring the target consistency with lower water to binder ratios.

Benzoment HP 266 is an appropriate type of admixture for concrete design aiming at reducing cement content to the allowed limits. Superplasticizing capacity of Benzoment HP 266 enables more economical concrete design with less cement content. Concretes designed in this way may be beneficial with their lower shrinkage and heat of hydration characteristics.

Does not contain any compounds that may cause corrosion of reinforcing steel.

APLICATION DETAILS, SAUGGESTIONS AND WARNING

Benzoment HP 266 should be added to the mixing water. As an alternative way, after the preparation of the fresh mixture by 1/3 of the mixing water, it can be added to the fresh mixture together with the remaining of mixing water. In case of the addition to the fresh mixture, additional mixing should be applied. Benzoment HP 266 should not be added to the dry mixture.

As the dosage of the chemical admixtures is greatly influenced from cement type, properties of the concrete ingredients and mix design, it is recommended that the optimum dosage of admixture should be determined on trial batches.

Benzoment HP 266 is generally compatible with the Portland cement types described in TS EN 197-1. In addition, it can be used in concrete mixes containing mineral admixtures such as silica fume, fly ash and ground granulated blast furnace slag. However, the presence of mineral admixtures in the mixture is greatly influence the required dosage of the admixture for a specified target. The optimum dosage of Benzoment HP 266 should be determined on trial batches.

Standard curing procedures should be followed.

Concrete surfaces should be kept wet in retarded concrete mixtures for reducing plastic shrinkage crack risk.

Benzoment HP 266 is not compatible with sulfonated naphthalene and sulfonated melamine based chemical admixtures. There is no known incompatibility with the other type of chemical admixtures and can be used with the others in the same mixture. In case of the combined usage, the different types of chemical admixtures should not be mixed together and be used separately. Please contact R&D department of BENZEN for further information.

Recommended Dosage:

The recommended dosage rate of Benzoment HP 266 for general concreting operations is between 0.8 % - 1.5 % of the weight of binding material (cement + mineral admixture). Overdose may cause significant segregation and excessive increase in setting time. In addition, the required dosage of Benzoment HP 266 to achieve a target performance will be different for each concrete mixture. The appropriate dosage should be determined on trial batches as it will not cause any segregation and/or undesirable side effects. It is known that there is a significant effect of C3A and SO3 content and fineness of cement on the appropriate dosage of Benzoment HP 266.

PRODUCT DESCRIPTION AND USE

BenzoRetarder is a set retarding chemical admixture specially designed for use in situations where setting time of fresh concrete should be intentionally extended for a long time.

BenzoRetarder is recommended for use in the applications and purposes below:

Any type of concreting operation requiring extended setting time of fresh concrete.

Continuous and large volume concreting operations.

Mass concrete applications.

Concreting operations that cold joint formation is undesirable.

In case of fresh concrete transportation to very long distances.

Concreting works requiring extended time for placing, vibrating and surface finishing operations.

Concreting operations requiring re-vibration.

Operations in hot weather conditions.

ADVANTAGES AND PROPERTIES

BenzoRetarder significantly extends the initial and final setting time of cement. It is suitable for use in all concreting operations where the fresh concrete must be remained in plastic stage for long time.

Provides easiness in large-volume and continuous concreting operations requiring advanced planning in production, transportation, pumping, placing, vibrating and surface finishing of fresh concrete.

Reduces cold-joint formation risk in layered mass concrete production.

Provides advantage in continuous mass concrete production by keeping the first layer concrete still capable of deforming as the upper layers successively placed in a long time.

Tabakalı kütle betonu uygulamalarında en alttaki tabakaların prizini tüm döküm tamamlanana kadar uzatarak üst tabakaların ağırlığı ile hasar görmesini önler.

Does not affect the ultimate strength of retarded concrete

Prizi kontrollü olarak yüksek oranda geciktirmesine karşın nihai dayanımı olumsuz etkilemez. Does not contain chloride or any other substances that may cause corrosion.

APLICATION DETAILS, SAUGGESTIONS AND WARNING

BenzoRetarder should be used by adding to the mixing water. Alternatively, it can be mixed with 1/3 of mixing water and added to the fresh concrete produced with 2/3 of mixing water. In case of addition to fresh mixture as described, additional mixing time of at least 3 minutes at high speed should be applied. BenzoRetarder is not added to the dry mixture.

BenzoRetarder can be used together with superplasticizers without set accelerator effect. In case of the combined usage with superplasticizers (without set accelerating effect), the different types of chemical admixtures should not be mixed together and be used separately. First the fresh concrete mixture should be prepared by the superplasticizer and then BenzoRetarder should be added to the fresh mixture. Please contact R&D department of BENZEN for further information.

BenzoRetarder can be used with Portland cement types described in TS EN 197-1. In addition, it can be used in concrete mixtures containing mineral admixtures such as silica fume, fly ash and ground granulated blast furnace slag. However, the required dosage for the best performance should be determined on trial batches.

As BenzoRetarder significantly extends the initial and final setting time of cement, the plastic stage of concrete will be maintained for a long time. Therefore, it should be considered that the hydrostatic pressure will be remined on the surface of molds for a long time.

It should be noted that the retarded concrete may be more vulnerable to surface defects due to evaporation. Evaporation from the surface of retarded concrete should be reduced or prevented by covering the surface of fresh concrete with wet fabric.

BenzoRetarder should not be used together with set accelerators, hardening accelerators and antifreeze agents.

BenzoRetarder should not be used in cold weather conditions.

Recommended Dosage:

The dosage of BenzoRetarder is a function of the ambient temperature during concreting and the desired delay time of setting. In addition, the dosage is affected from the type of cement and mixture properties of concrete. The recommended dosage rate is between 0.2% - 2% of weight of binding material of concrete. Depending on the ambient temperature, retarding performance of BenzoRetarder increases as the dosage increases. The usage of 1% BenzoRaterder (CEM 42.5 R, 300 kg/m3) extends the setting time around 19 hours, 13 hours and 5 hours at the ambient temperatures of 15 °C, 25 °C and 35 °C, respectively. Similarly, 0.2%, 1.0% and 2.0 % usage of BenzoRetarder at 20 °C ambient temperature result in 3 hours, 14 hours and 27 hours delay in setting time, respectively. Therefore it is recommended that the appropriate dosage of BenzoRetarder should be determined on laboratories which capable of simulating the expected ambient temperature conditions of site or trial batches prepared on site directly. The concretes containing overdose BenzoRetard may never set. Precence of mineral admixtures such as silica fume, fly ash and ground granulated blast furnace slag may affect the optimum dosage of BenzoRetarder for a target performance. The optimum dosage should be determined on trial batches. Please contact R&D department of BENZEN for technical support.