Product Data Sheet Show all documents

Sika® FerroGard® CI 30

(former MLife CI 30)

Corrosion inhibiting admixture

Sika® FerroGard® CI 30 is a calcium nitrite-based admixture designed to inhibit the corrosion of steel in reinforced concrete. Sika® FerroGard® CI 30 contains a minimum of 30 % calcium nitrite by mass and meets the requirements of ASTM C 1582, Corrosion Inhibiting Admixture and ASTM C494, Type C, Accelerating Admixture. Suitable for use in hot and tropical climatic conditions.

Sika® FerroGard® CI 30 is recommended for conventional steel reinforcement as well as prestressed or post-tensioned concrete that will be exposed to chlorides from marine environments or deicing salts. Sika® FerroGard® CI 30 will extend the service life of structures by effectively inhibiting corrosion, in areas such as parking garage, decks and support structures, bridge decks, marine structures, etc.
Sika® FerroGard® CI 30 may also be used in concrete elements where chlorides are added initially to the concrete mix.
Sika® FerroGard® CI 30 is a corrosion-inhibiting admixture that provides protection against corrosion in reinforced concrete structures. Sika® FerroGard® CI 30:
  • Extends the service life of reinforced concrete structures.
  • Is recommended for use in all types of reinforced concrete, precast and/or prestressed concrete as well as ready mix applications.
Product Data Sheet Show all documents

Usage

In the high alkalinity of concrete, reinforcing steel builds up a natural passivation layer. This layer protects the steel from corrosion. This passive ferric oxide layer can be damaged by the presence of chlorides and combined with the presence of moisture and oxygen which will lead to corrosion of the steel.
Sika® FerroGard® CI 30 will help oxidize the steel to form ferric oxide, which resists chloride attack. This reduces the areas of ferrous oxide ions that are susceptible to attack by chlorides. Ferrous oxide creates a ferrous oxide complex (rust), if attacked by chlorides. In the presence of these chlorides, rust continues to generate in these areas (corrosion pits) and ultimately leads to staining, cracking and spalling of the concrete.   Sika® FerroGard® CI 30 fortifies the ferric oxide passivating layer prior to the penetration of chlorides. The nitrite ions in Sika® FerroGard® CI 30 will convert ferrous oxide to more resistant ferric oxide, thereby protecting the steel reinforcement from corroding.

Advantages

Sika® FerroGard® CI 30 is recommended for conventional steel reinforcement as well as prestressed or post-tensioned concrete that will be exposed to chlorides from marine environments or deicing salts. Sika® FerroGard® CI 30 will extend the service life of structures by effectively inhibiting corrosion, in areas such as parking garage, decks and support structures, bridge decks, marine structures, etc.
Sika® FerroGard® CI 30 may also be used in concrete elements where chlorides are added initially to the concrete mix.
Sika® FerroGard® CI 30 is a corrosion-inhibiting admixture that provides protection against corrosion in reinforced concrete structures. Sika® FerroGard® CI 30:
  • Extends the service life of reinforced concrete structures.
  • Is recommended for use in all types of reinforced concrete, precast and/or prestressed concrete as well as ready mix applications.

Packaging

210 L drums

Colour

Pale yellow to greenish liquid

Product Details

Product Information

Shelf life

12 months from date of production if stored properly

Storage conditions

Store in undamaged, unopened, original sealed packaging in dry conditions at temperatures between +5 °C and +35 °C. Product from direct sunlight.

Density

~1.3 kg/l  (+25°C)

Total chloride ion content

Nil

(EN 934-2)
Technical Information

Concreting guidance

The standard rules of good concreting practice for production and placing must be observed when using Sika® FerroGard® CI 30 in concrete. Refer to relevant standards.
Fresh concrete must be cured properly especially at high temperatures in order to prevent plastic and drying shrinkage. Use Sika® Antisol® products as a curing agent or apply wet hessian.

 

Application

Application Information

Dispensing

Measure the required quantity manually or by automated dispenser. Add Sika® FerroGard® CI 30 directly into the freshly mixed concrete at the end of the batching cycle. When used in combination with other admixtures, care must be taken to dispense each admixture separately into the mix.
Mix water adjustment is necessary to account for the water in Sika® FerroGard® CI 30 and to maintain the required water/cement ratio. The free water content should be reduced to account for the quantity of Sika® FerroGard® CI 30 admixture used.

Compatibility

Sika® FerroGard® CI 30 can be used with all types of Portland cement compliant with ASTM, AASHTO or CRD specifications. It can be used in combination with other Sika® admixtures including microsilica, water reducers, superplasticizers, set retarders and air entrainment agents.
Admixtures have to be added separately to the concrete mix in order to deliver the required result. Sika® FerroGard® CI 30 may slightly reduce the entrained air content and a higher dosage of the air entrainment agent may be required.
We recommend to perform trial mixes to establish the required performance when combining Sika® FerroGard® CI 30 with other products or admixtures.
Consumption

Recommended dosage

The recommended dosage rate will vary between 5 and 30 L/m3 of concrete, depending on the severity of the corrosion environment. In absence of a specified dosage rate, please contact your local Sika® representative. Adjust water content accordingly.

Sika® FerroGard® CI 30 may accelerate the setting time. In order to prevent slump loss or finishing characteristics, a set retarding admixture, like Plastiment®, may be required, especially in warm weather application. The full accelerating effect of Sika® FerroGard® CI 30 may be used for cold weather concreting.
Trial mixes must be performed to establish the exact dosage rate required.

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