BECAUSE EVERYONE NEEDS FIBERS

Hi-Con works with a special type of ultra high strength concrete (UHPC), we call it CRC i2®. CRC is short for Compact Reinforced Composite and the original version was developed and patented by Hans Henrik Bache at Aalborg Portland. CRC has a very high compressive strength - typically around 165 MPa in our production - but we often specify a lower strength of 110 MPa as this is the strength we work with when designing and calculating the elements. The high compressive strength results from a dense, compact matrix with low porosity, which is crucial to provide the high service life of more than 100 years - even in marine environments or in structures exposed to extreme cold.

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Our material, CRC i2®, contains a large amount of steel fibres, which give the desired toughness to the concrete, enabling us to apply tight reinforcement without cracking. CRC i2® can be called both a high-performance, high-performance concrete and a fiber concrete, but at Hi-Con we often use the English term UHPC (ultra high performance concrete) because the material has more exceptional properties than just strength. Where fiber concrete is only reinforced by its fibres, in our CRC i2® we only use the steel fibers as secondary reinforcement to ensure controlled cracking, which is important in deflection. However, we use traditional steel reinforcement to ensure the load-bearing capacity of our structures.