Increasing resistivity

The resistivity of reinforced concrete may be increased by the application of external wall insulation, water repellent surface treatments, pore-filling impregnation or surface coatings, all techniques available from Weber.

Problems & Solutions

Issues you may face

BS EN 1504 Principle 8 is concerned with increasing resistivity by increasing the electrical resistivity of the concrete. The resistivity of reinforced concrete may be reduced through the application of external wall insulation, water repellent surface treatments, pore-filling impregnation or surface coatings.

1. Water penetration

Water penetration due to exposed areas of concrete leading to reinforcement corrosion.

2. Chloride-contaminated concrete

Chloride-contaminated concrete leading to chloride-induced corrosion and delamination of concrete.

3. Water penetration

Water penetration due to ponding, leading to reinforcement corrosion.

4. High moisture content

High moisture content on external areas of reinforced concrete leading to reinforcement corrosion.

Solutions

Methods of protection based upon the BS EN 1504 Principle 8 is the use of the following:

  • 8.1 Limiting moisture content by surface treatment, coatings or external wall insulation.

1. Hand-applied mortars

To replace damaged concrete and increase resistivity. Use webercem HB30 or webercem HB40.

2. Sprayed concrete

To replace contaminated concrete and to increase concrete cover. Use:

3. In-surface impregnation

Impregnation of the concrete surface to limit water penetration. Use webertec aquapel créme.

4A. Coating

Applied to exposed areas of concrete to increase resistivity. Use:

4B. External Wall Insulation (EWI)

To provide overcladding to the surface of the concrete to reduce the corrosion rate and protect against water penetration. Use webertherm XP.

Contact us

If you have any questions or would like assistance, please contact our technical team:

Our technical team is available Monday to Friday, 8:30am until 5.00pm.

Click Compare to help you choose the right product for your project, if you need further assistance please email technical@netweber.co.uk

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