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Why ultra high peformance concrete?

Because everybody needs fibres

Because everybody needs fibres

Hi-Con works with a special type of Ultra High Performance Concrete (UHPC), we call it CRC i2®. CRC is an abbriviation for Compact Reinforced Composite and its original form 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 indicate a lower strength of 110 MPa, as this strength is the one we work with when designing and calculating the elements. The high compressive strength comes from a dense matrix with a low porosity, which is cricial in order to provide the high durability of more than 100 years - even in marine environments or in constructions that are exposed to extreme cold.

Our material, CRC i2® contains a great amount of steelfibers, which provide us with the desired ductility that allows us to apply a tight reinforcement without cracking. CRC i2® can be referred to as both a high performance concrete and a fiber concrete, but at Hi-Con we use the term UHPC to signal a number of other properties than strength. While fiber concrete is only reinforced by its fibers, we only use the fibers as secondary reinforcement to secure cracking control, which is important to our deflections. However, we use traditional reinforcement to secure the load capacity of our constructions.


Combining the best from two worlds

CRC i2® looks and acts like conventional concrete, but in terms of properties, CRC i2® consists of a combination of both steel and concrete. In comparison to conventional concrete, our material CRC i2® has a significant higher strength and a higher durability, which means that we can cast our elements with a much smaller cover layer on only 10-15 mm and with a better anchoring and wear resistance. In comparison to steel, CRC i2® has one third density, a higher durability, a significantly better fire resistance and more efficient welds can be performed.

So why consider UHPC? By using UHPC in your building project, we are able to offer you a more light and slender expression than you experience when using conventional concrete. Furthermore, you avoid complicated assemblies when using UHPC. If you consider UHPC versus steel, UHPC offers you a maintenance-free and fire resistant construction that can be shaped and formed without limits. 


The material properties

Be creative and don’t be limited by what you are used to expect from conventional concrete – in many cases CRC i2® can do so much more in terms of expression.

Our elements in CRC i2® has a very high durability. The high durability of +100 years is achievable because of a tight matrix and low porousity of the material. 

When you work with CRC i2® you can expect elements with low maintenance. Like conventional concrete, elements in CRC i2® can get a deposit of algea, fouling and soil, which can be washed of. These kinds of patina do not have any influence on the constructive function of the elements. Therefore, you will not experience any kind of constructive maintenance of your elements in CRC i2® and you will not have to consider any replacement of the elements within +100 years - not even if the elements are exposed to extreme conditions. 

Our elements can be mounted by various mounting principles - sometimes even by using a mix of these principles. Despite the mounting principle, we always develop the most optimal solution for your building project.   

Like conventional concrete, CRC i2® is a fire resistant material. We have perfomed a number of fire tests on our material and you can read more about the results on our blog

We use a small covering layer when casting our elements, which enable us to cast very slender elements. It is not the material itself but rather the smaller amount of material used, which generates the slenderness and lightweight of the elements. This property makes it possible to cast very large formats and therefore, you should not be afraid to dream BIG. Don’t be scared to dream of the impossible – it is actually more often the building, regulations or other factors that limit size and scope of CRC i2®, not the material itself. So, if you start with a grand vision – we´ll get you as close as possible to realizing it.

Because of a tight matrix and a low porousity, our material CRC i2® possesses an extremely high compressive strength. The strength is higher than both conventional concrete, fiber concrete and high performance concrete. We typically work with a compressive strength on 165 MPa in our production. 

When solutions from Hi-Con are being installed, smaller cranes are used compared to traditional concrete. This makes mounting both cheaper, easier and faster.

Don't be shy

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