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GRP Reinforcement Bars

Building elements often must be restored or even replaced because of corrosion damage to the steel reinforcement,  leading to a destruction of the concrete structure. This is particularly true for components exposed to de-incing salt. With the deployment of GRP reinforcements, corrosion is an issue of the past. It drastically reduces the number of repairs needed to the  construction components. GRP reinforcements are mainly applied to concrete and polymer concrete building parts.

Comparison of Steel- and GRP Reinforcements

CharacteristicsSteel ReinforcementGRP Reinforcement
MaterialSteelGRP
Tensile strenght, Mpa360-3901200-1300
E-Module, Mpa20000060000
Elongation at fracture, %252,2
Lin. expansion-
coefficient, 10-6/K
13-159-12
Density, kg/dm³71,9
Length6-12 m6 m or at request
Corrosion- and 
chemical resistance
noyes
Thermal conductivityyesno
Dielectricnoyes
Radiotranslucentnoyes
Insensitive to 
electromagnetic fields
noyes
life expectancy30 years100 years

Advantages over steel

  • resistant to corrosion and acids
  • extended service life
  • no maintenance required
  • lightweight with high tensile strenght
  • permeable to magnetic fields and radio frequencies