Alkali-Slica Reaction Controlling Admixture


ARSET STOP ASR is a chemical additive developed to prevent and control the Alkali-Silica Reaction (ASR) that may occur in concretes containing reactive aggregate.


Chemical Base

Lithium based

Color / Appearance

Light brown liquid


4,00 – 4,00


1,20 ± 0,03 g/cm3

Chlorine Content (%)

<0,1 (EN 480-10)

Corrosion Behavior

Contains only components according EN 934-1 Annex A.1

Dangerous Substances

Comply with annex AZ

Arset Stop ASR     ASTM C 494 Type S    
  • It does not adversely affect the wet and hardened properties of concrete.
  • It does not damage the steel reinforcement.
  • It does not contain chlorine.
  • It allows the use of regional aggregates.
  • It extends the life of concrete.
  • Compatible with concrete additives
Areas of Use
  • In concretes containing high alkali cement and highly reactive alkali aggregate
  • On bridges and highways
  • At airports
  • In water structures such as dams and harbors
  • In industrial buildings
Terms of Use

Alkali-Silica Reaction (ASR) is a reaction in concrete between alkali hydroxides coming from components and certain types of aggregates. The alkali hydroxides in the pore water of the concrete react with the silica coming from the aggregate to form alkaline silica gel. This gel expands as it comes into contact with water and creates tensile pressure in the concrete. Cracks occur in the concrete due to this pressure. When ARSET STOP ASR is added to concrete, it prevents the alkali-silica reaction and protects the concrete against cracking.

Consumption Dosage

The dosage of ARSTEP STOP ASR varies according to the alkali amount of the concrete components and the activity. Example calculation:

  • The alkali amount of the cement is determined.
  • ARTEP STOP ASR is taken as 5.50 kg per kg alkali-silica. In cement with 0.5% alkali rate;

The alkali amount is converted to decimal value and multiplied by the cement dosage in the concrete.

Cement dosage for 300 kg: 0.005 x 300 kg = 1.5 kg Alkali amount in concrete: 1.5 kg x 5.50 kg = 8.25 kg ARSET STOP ASR / m³ concrete

Method of Application

ARSTEP STOP ASR is added to the concrete mixture after 70% of the mixing water is used.

Since ARSET STOP ASR contains water and the addition of admixture will increase the total concrete water / cement ratio, the concrete mixture water should be reduced in the ready mixed concrete plant and the mixture design should be done accordingly.

Compatibility with Other Admixtures

ARSET STOP ASR can be combined with the following admixtures. Laboratory tests should be carried out before use.

  • Arstep / Arstep Extra / Degaset Series Admixtures
  • Arset Air Series
  • Arset Doz Series
  • Arset Friz Series
  • Arset Fast Series
  • Arset Retard Series
  • Arset Zero Series
  • 30 kg plastic drum
  • 250 kg drum
  • 1000 kg container
Storage and Shelf Life

Shelf life is 12 months from the date of production when stored in original unopened and undamaged packages (drums, barrels, IBC containers) at temperatures between +5 °C and +35 °C, protecting from direct sunlight, excessive heat and frost.

If the product has waited for a long time, make it homogeneous by mixing slowly at low speed with mechanical methods before using the product.

Some subsidence may occur during long-term storage. In this case, the product can be used by filtering. Make sure that the product does not freeze.

Safety Measures

Use protective clothes, gloves, glasses and mask compatible with health and safety regulations during the application. Avoid direct contact with eyes and skin during storing and application, in case of contact wash off thoroughly with soap and water, if ingested seek medical attention immediately. Store away from all foodstuffs. Keep away from children. ARSET STOP ASR is not flammable. For detailed safety information please consult the product’s Safety Data Sheet (SDS).

You can contact us to access the Safety Data Sheet.