SHALIMAR’S KAVASSU GUNITEX – AFA

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Alkali Free Accelerator For Sprayed Concrete & Mortar

Kavassu Gunitex AFA is a – high performance set accelerator for sprayed concrete .It is liquid admixture whose dose can be varied to the desired setting and hardening for guniting, shotcreting etc. Kavassu Gunitex – AFA is a alkali free accelerator for all types of concrete & mortars. Shaligunitex – AFA is supplied in liquid form and accelerates the setting time of the admixed concretes or mortars there by providing multiple advantages. The use of Kavassu Gunitex -AFA permits concreting at temperature ranging down to 10C. Kavassu Gunitex – AFA increase the rate of hydration and lowers freezing point of fresh concrete in addition to accelerating effect. Its excellent accelerating properties can be best availed by use of high speed concrete pumps.

Kavassu Gunitex – AFA is suitable for all application, where exceptionally high early strength, and extremely thick layers are required. Cement mortar admixed with Kavassu Gunitex – AFA sets rapidly, hence quick placing of wet mortar is required.

Kavassu Gunitex – AFA produce concretes suitable for placement in relatively cooler atmospheric conditions assuring an uninterrupted continuation of work. The tendency of concrete to exhibit efflorescence is strongly suppressed by the use of Kavassu Gunitex – AFA. It combines with soluble present in wet cement paste and reacts chemically to lower the freezing point of fresh concrete. It simultaneously brings about acceleration in setting time even at low temperature. For achieving the best results gauging water must be kept to a minimum to obtain a dry consistency. Kavassu Gunitex -AFA make the mix homogenous & ensure good pump ability. It avoids sudden congelation. It increases strength very rapidly.

Kavassu Gunitex – AFA is formulated with selective alkali free ingredients and is manufactured under controlled conditions to give a consistent regular product.

General

Kavassu Gunitex AFA is a – high performance set accelerator for sprayed concrete .It is liquid admixture whose dose can be varied to the desired setting and hardening for guniting, shotcreting etc. Kavassu Gunitex – AFA is a alkali free accelerator for all types of concrete & mortars. Shaligunitex – AFA is supplied in liquid form and accelerates the setting time of the admixed concretes or mortars there by providing multiple advantages. The use of Kavassu Gunitex -AFA permits concreting at temperature ranging down to 10C. Kavassu Gunitex – AFA increase the rate of hydration and lowers freezing point of fresh concrete in addition to accelerating effect. Its excellent accelerating properties can be best availed by use of high speed concrete pumps.

Uses

Kavassu Gunitex – AFA is suitable for all application, where exceptionally high early strength, and extremely thick layers are required. Cement mortar admixed with Kavassu Gunitex – AFA sets rapidly, hence quick placing of wet mortar is required.

Advantages

Kavassu Gunitex – AFA produce concretes suitable for placement in relatively cooler atmospheric conditions assuring an uninterrupted continuation of work. The tendency of concrete to exhibit efflorescence is strongly suppressed by the use of Kavassu Gunitex – AFA. It combines with soluble present in wet cement paste and reacts chemically to lower the freezing point of fresh concrete. It simultaneously brings about acceleration in setting time even at low temperature. For achieving the best results gauging water must be kept to a minimum to obtain a dry consistency. Kavassu Gunitex -AFA make the mix homogenous & ensure good pump ability. It avoids sudden congelation. It increases strength very rapidly.

Consistency

Kavassu Gunitex – AFA is formulated with selective alkali free ingredients and is manufactured under controlled conditions to give a consistent regular product.

Instruction For Use

Kavassu Gunitex – AFA can be used with all types of normal cements. The substrate should be clean and free loose particles and preferable damp. It is recommended to use fresh cement The addition of AFA should be done in the course of discharging of concrete through pressure nozel by means of suitable dosing devices. Under normal circumstances AFA enables quicker demoulding of formwork As the age of the cement can have a negative influence on the setting property of the mix. The product is sensitive to the type of cement hence a preliminary test to check setting and the 24 Hour strength of the cement planned for use in a project.

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The dosage depends on the temperature conditions, reactivity of cement used and on required thickness, off layers, setting time and early strength development. The consumption is normally in the range of 3 to 12 % of binder weight over dosing above may result in a decrease in final strength. Since the rate of acceleration of setting of concrete depends on various factors like quality of cement, grading of aggregates, working temperature etc, a preliminary test under site conditions is essential to determine the exact proportion of – to be added to achieve Kavassu Gunitex AFA maximum results. At air temperature upto Kavassu Gunitex – AFA should be added at a rate of 0.4 to 1.5% of cement weight.

Keep gauging water to a minimum.
Do not use frozen aggregates.
Areas to be concreted should be free from ice.
Fresh concrete should be so sheltered as to ensure the
preservation of heat of hydration evolved.
This is a factor influencing capillary pores and micro structure of
concrete.
The rules laid down by concerned authorities for concreting in cold weather, should be strictly adhered to.
Compatibility of KAVASSU GUNITEX- AFA with other admixtures:
Kavassu Gunitex – AFA is a compatible product, which can be put to multiple uses in combination.
Kavassu Gunitex – AFA is compatible with KAVASSU PLAST series of super plasticizers & Kavassu waterproofing admixtures and air entraining agents. Preliminary trial is required as per technical data.

Kavassu Gunitex – AFA must be stored at a minium 50C and maximum 350C (optimum temperature for storage and performance is 200C). Must not be stored in normal steel containers as the pH can cause corrosion that might cause the performance of the product. It must be stored in HDPE barrels for best results. Must be agitated prior to use by mechanical stirring or re circulation pumping. It has a self life of 6 months. Performance

Form : Liquid suspension
Colour : Colour less
Density : 1.43+0.02
pH Value (1:1 water solution) : 2.60+0.50
(Na 20%) chloride free : <1%

6 months in unopened sealed containers.

Liquid 250 kg drums,25 kg containers

As per ISO 9001: 2008

Dosage

The dosage depends on the temperature conditions, reactivity of cement used and on required thickness, off layers, setting time and early strength development. The consumption is normally in the range of 3 to 12 % of binder weight over dosing above may result in a decrease in final strength. Since the rate of acceleration of setting of concrete depends on various factors like quality of cement, grading of aggregates, working temperature etc, a preliminary test under site conditions is essential to determine the exact proportion of – to be added to achieve Kavassu Gunitex AFA maximum results. At air temperature upto Kavassu Gunitex – AFA should be added at a rate of 0.4 to 1.5% of cement weight.

Precautions

Keep gauging water to a minimum.
Do not use frozen aggregates.
Areas to be concreted should be free from ice.
Fresh concrete should be so sheltered as to ensure the
preservation of heat of hydration evolved.
This is a factor influencing capillary pores and micro structure of
concrete.
The rules laid down by concerned authorities for concreting in cold weather, should be strictly adhered to.
Compatibility of KAVASSU GUNITEX- AFA with other admixtures:
Kavassu Gunitex – AFA is a compatible product, which can be put to multiple uses in combination.
Kavassu Gunitex – AFA is compatible with KAVASSU PLAST series of super plasticizers & Kavassu waterproofing admixtures and air entraining agents. Preliminary trial is required as per technical data.

Storage

Kavassu Gunitex – AFA must be stored at a minium 50C and maximum 350C (optimum temperature for storage and performance is 200C). Must not be stored in normal steel containers as the pH can cause corrosion that might cause the performance of the product. It must be stored in HDPE barrels for best results. Must be agitated prior to use by mechanical stirring or re circulation pumping. It has a self life of 6 months. Performance

Properties

Form : Liquid suspension
Colour : Colour less
Density : 1.43+0.02
pH Value (1:1 water solution) : 2.60+0.50
(Na 20%) chloride free : <1%

Shelf Life

6 months in unopened sealed containers.

Packing

Liquid 250 kg drums,25 kg containers

Quality Assurance

As per ISO 9001: 2008

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