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CONCRETE PROTECTION FOR SILAGE BUNKERS

Concrete Protection for Silage Bunkers

Silage juices are highly aggressive towards reinforced concrete.
Silage juices are strongly acidic (pH typically 3.5–4.5, sometimes below 3) and react with calcium hydroxide (Ca(OH)₂) in the concrete, converting it into soluble calcium salts. This results in gradual surface degradation of the concrete (“eating away” the concrete).
The juices penetrate pores, dissolve calcium carbonate and other components, making the concrete porous and brittle. Over time, deep erosion spots form, especially at the lower parts of the walls where juices accumulate.

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Why it is important to protect the concrete surfaces of reinforced concrete silage bunkers

  • Reduced load-bearing capacity of the structure – corroded reinforcement and degraded concrete significantly weaken the bunker. In the worst case, the structure may collapse.
  • Shortened service life of the silo – unprotected concrete surfaces deteriorate rapidly (serious damage can occur within 10–20 years).
  • Environmental and safety risks – cracks in the walls can cause leakage of silage contents, contaminating soil and water and posing dangers to people and animals.
  • High repair costs – repairing a damaged silo (cleaning reinforcement, restoring concrete, applying waterproofing) is very expensive and complicated.
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Most common protection methods:

  • Epoxy- or polyurethane-based coatings
  • Fiberglass lining (GRP)
  • Special acid-resistant concretes (e.g. silica-enriched)
  • Plastic or rubber linings (HDPE, EPDM) in the lower sections

Traveter Grupp OÜ offers repair and polyurethane-based protective coating application for both new and existing reinforced concrete silage bunkers. Our goal is to ensure that your silo concrete surfaces remain durable, long-lasting, and easy to clean.How we work:

  • Removal of damaged concrete is carried out using ultra-high-pressure water jetting.
  • Reinforcement restoration – we clean rusted rebar with sandblasting, apply corrosion protection, and add supplementary reinforcement if needed.
  • Concrete layer restoration – we use certified repair mortars from Sika AG that restore the protective layer and extend the structure’s service life. Restored floor structures can be loaded within just a few hours.
  • Concrete surface protection – we apply Sikagard® M 790, a two-component crack-bridging membrane based on Xolutec® technology, providing excellent chemical and mechanical resistance for concrete surfaces.

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How we work:

  • Removal of damaged concrete is carried out using ultra-high-pressure water jetting.
  • Reinforcement restoration – we clean rusted rebar with sandblasting, apply corrosion protection, and add supplementary reinforcement if needed.
  • Concrete layer restoration – we use certified repair mortars from Sika AG that restore the protective layer and extend the structure’s service life. Restored floor structures can be loaded within just a few hours.
  • Concrete surface protection – we apply Sikagard® M 790, a two-component crack-bridging membrane based on Xolutec® technology, providing excellent chemical and mechanical resistance for concrete surfaces.

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