All concrete deteriorates because of its porous nature and the weak electronic forces which hold the individual cement crystals together. Because these are easily broken, concrete is vulnerable to attack from abrasion, impact, vibration and chemicals.
- Carbonation of concrete leads to corrosion of steel reinforcement particularly where the concrete cover was originally inadequate.
- The polluted industrial atmosphere contains many aggressive substances which attack concrete.
- De-icing salt seriously damages road and bridge structures.
- Shrinkage cracks, due to excess water in the concrete mix, poor compaction, cavities and aggregate segregation, can make concrete permeable.
- Expansion of ice within the concrete can break and weaken the structure.
Belzona® 4141 (Magma-Build) is specially designed as a lightweight, high build repair system for concrete and stone allowing permanent repairs to be carried out quickly and with no form work or supports, and minimal access equipment.