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Sika Galvashield CC, Type 2A Alkali-Activated Galvanic Anodes, Interior & Exterior

Sika Galvashield CC, Type 2A Alkali-Activated Galvanic Anodes, Interior & Exterior

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SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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General Specifications
Packaging 30 anodes per box; 5.4 kg - 32 mm x 65 mm
Usage Chloride and carbonation-resistant protection for concrete (marine, structural, pools)
Chemical Base Embedded galvanic anode (zinc-based)
Usage Area Exterior & Interior
Color N/A
Storage Conditions Store properly in original unopened, sealed and undamaged packaging in dry and cool conditions. Avoid extremes of temperature and humidity
Density N/A
Consumption N/A

Alkali-Activated (Type 2A) Embedded Galvanic Anodes for Corrosion Control in Reinforced Concrete Structures

Sika Galvashield CC embedded Type 2A (alkali-activated) galvanic anodes are used to mitigate ongoing corrosion and to prevent the initiation of new corrosion activity in sound reinforced concrete structures. The anodes consist of a high purity zinc anode core that is surrounded by a specially formulated precast cementitious mortar with an internal pH >14, keeping the zinc active over the life of the anode. Sika Galvashield CC anodes are available in three sizes to fit any structure and level of protection. The cylindical anodes are quickly and easily installed into drilled holes in concrete that is mechanically sound but has ongoing corrosion activity. Once installed, the zinc anode corrodes preferentially to protect the adjacent reinforcing steel.

  • Proven technology: extensive 20-year track record, supported by independent test program.
  • Focused protection: provides localised corrosion protection in areas with high corrosion potential or active corrosion.
  • Economical: low cost method by targeting only the remaining areas of high corrosive risk; protecting local areas that are chloride contaminated but sound, thereby reducing concrete breakout.
  • Versatile: effective in chloride-contaminated and carbonated concrete. Can be used for both conventionally reinforced and prestressed or post-tensioned concrete.
  • User friendly: installation is quick and easy.
  • Low maintenance: requires no external power source or system monitoring.
  • Measurable performance: anode performance can be easily monitored if required.
  • Long lasting: minimum 20-year anode service life* when using standard design tables; reducing the need for future repairs.
  • Full system: can be used in conjunction with Sika MonoTop, FerroGard, Margel and / or Sikagard technologies to offer a full corrosion management system.
Usage
  • Balconies. 
  • Reinforced concrete with high chloride content.
  • Car park decks, columns and beams.
  • Carbonated concrete.
  • Post-tensioning anchors.
  • Prestressed concrete.
  • Piers, wharves, piles pile caps and beams in a marine environment.
  • Bridge decks, piers, abutments, pier caps and girders.
  • Swimming pools.
  • Concrete tanks.
  • Underpasses and other highway structures.
 
Advantages
  • Proven technology: extensive 20-year track record, supported by independent test program.
  • Focused protection: provides localised corrosion protection in areas with high corrosion potential or active corrosion.
  • Economical: low cost method by targeting only the remaining areas of high corrosive risk; protecting local areas that are chloride contaminated but sound, thereby reducing concrete breakout.
  • Versatile: effective in chloride-contaminated and carbonated concrete. Can be used for both conventionally reinforced and prestressed or post-tensioned concrete.
  • User friendly: installation is quick and easy.
  • Low maintenance: requires no external power source or system monitoring.
  • Measurable performance: anode performance can be easily monitored if required.
  • Long lasting: minimum 20-year anode service life* when using standard design tables; reducing the need for future repairs.
  • Full system: can be used in conjunction with Sika MonoTop, FerroGard, Margel and / or Sikagard technologies to offer a full corrosion management system.
         * As with all galvanic protection systems, service life is dependent upon a number of factors including reinforcing steel density, concrete conductivity, chloride concentration, humidity and anode spacing. 
Packaging

Sika Galvashield CC2

30 anodes per box

5.4kg box

Sika Galvashield CC4

30 anodes per box

9.1kg box

Sika Galvashield CCX20 anodes per box10kg box
Technical Information
Design Considerations

Design Table 1 - Design Criteria:

       

Corrosion Risk Category

Chloride Content*

Minimum Current Density at 20 Years**

Low to Moderate

<0.8%

0.6mA/m2

High

0.8 to 1.5%

1.2mA/m2

Extremely High

>1.5%

2.4mA/m2

* Chloride content is calculated using percentage by weight of cement. 

** Design current densities for Sika Galvashield CCX anodes are double the standard current densities at 20 years. 

        

Design Table 2 - Unit Sizes and Minimum Hole Sizes:

       

Anode Type

Unit Size: diameter x length (mm)

Minimum Hole Size: diameter x depth (mm)

Sika Galvashield CC2

32 x 75

40 x 105

Sika Galvashield CC4

36 x 100

45 x 130

Sika Galvashield CCX46 x 11556 x 145

Anode Spacing

The following Tables provide guidelines for achieving the minimum current density for the appropriate corrosion risk category as stated, 20 years after installation.

        

NOTE: In warmer or more demanding conditions (such as marine environments), Sika Galvashield CCX anodes are recommended to achieve the 20 year anode life.

         

Design Table 3 - Low to Moderate Corrosion Risk (Chloride Content* <0.8% or Carbonated Concrete):

       

Steel Density Ratio

Sika Galvashield CC2Sika Galvashield CC4 / CCX
(Steel Surface Area / Concrete Surface Area)Maximum Grid Dimensions (mm)Maximum Grid Dimensions (mm)

<0.30

650

700

0.31 - 0.60

475

675

0.61 - 0.90375550
0.91 - 1.20325475
1.21 - 1.50300425
1.51 - 1.80250375
1.81 - 2.10225350

* Chloride content is calculated using percentage by weight of cement. 

        

 

Design Table 4 - High Corrosion Risk (Chloride Content* 0.8 - 1.5%):

       

Steel Density Ratio

Sika Galvashield CC2Sika Galvashield CC4 / CCX
(Steel Surface Area / Concrete Surface Area)Maximum Grid Dimensions (mm)Maximum Grid Dimensions (mm)

<0.30

475

600

0.31 - 0.60

325

475

0.61 - 0.90275375
0.91 - 1.20250325
1.21 - 1.50225300
1.51 - 1.80200275
1.81 - 2.10175250

* Chloride content is calculated using percentage by weight of cement. 

    

Design Table 5 - Extremely High Corrosion Risk (Chloride Content* >1.5%):

       

Steel Density Ratio

Sika Galvashield CC2Sika Galvashield CC4 / CCX
(Steel Surface Area / Concrete Surface Area)Maximum Grid Dimensions (mm)Maximum Grid Dimensions (mm)

<0.30

340

475

0.31 - 0.60

240

335

0.61 - 0.90195275
0.91 - 1.20170235
1.21 - 1.50150210
1.51 - 1.80135195
1.81 - 2.10125180

* Chloride Content is based on percentage by weight of cement. 

       

NOTE: For structures in high or extremely high corrosion risk environments that have high steel density ratios requiring close anode spacings, Sika Galvashield Fusion anode systems are typically more economical.