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Technology

Ultra High Performance Concrete
the innovative high-tech material

Ultra High Performance Concrete (UHPC) is an innovative high-tech material based on nanotechnology. It is a cement-bonded mineral casting with outstanding mechanical properties, optimum economic efficiency and a wide range of applications.

Our solutions made of UHPC meet the highest requirements in terms of accuracy, stiffness, vibration damping, temperature resistance, compressive strength and durability. In combination with its function-integrating character, the advantages of this high-performance material far exceed those of conventional alternatives in machine engineering and industry such as steel, grey cast iron or cast iron. Our solutions also set new standards for architects and engineers in the construction sector.

Technical information

Here you will find an overview of all relevant technical material data for download.

Know-howin concrete technologies

With our know-how in concrete technologies, we develop a concept tailored to your application and a corresponding recipe to achieve optimum properties and the most economical production. In this way, we can specifically influence the material properties and adapt them to your individual needs. In addition, the mechanical behavior can also be optimized by adding fibers or textile elements, for example, or by prestressing on our tensioning track.

Material data

characteristic uhpc e45 design value e45 uhpc e80 design value e80
compressive strength fcm > 125 MPa σzul= 40 MPa     > 150 MPa     σzul= 40 MPa    
flexural tensile strength fctm 15 MPa σzul= 5 MPa    20 MPa     σzul= 5 MPa   
centric tensile strength     σzul= 3 MPa     σzul= 3 MPa    
static modulus of elasticity Ec 46,500 MPa     45,000 MPa     84,500 MPa     80,000 MPa
dyn. modulus of elasticity E     55,600 MPa     89,600 MPa    
poisson´s ratio μ     0.19 [ - ]     0.20 [ - ]     0.20 [ - ]    
Density hardened concrete ρc     2,480 kg/m³     2,500 kg/m³     2,790 kg/m³     2,800 kg/m³    
specific thermal capacity cp 1.2 J/gK         1.2 J/gK        0.85 J/gK         0.85 J/gK        
thermal conductivity λ 3.0 W/mK     3.0 W/mK     6.0 W/mK     6.0 W/mK    
thermal expansion αT 12.0 · 10-6 [1/K]     12.0 · 10-6 [1/K]     7.0 · 10-6 [1/K]     7.0 · 10-6 [1/K]    

Material comparison

charateristics uhcp
e45 | e80

mineral cast/

polymerconcrete

natural stone cast iron ordinary concrete
density ρc [tons/m3] 2.5 | 2.8 2.3 – 2.4 2.9 – 3.0 7.2 – 7.4 2.3
pressure strength fcm [MPa] > 125 | > 150 110 – 150   250 – 360  - 5 – 55
flexural tensile strength fctm [MPa] 15 | 20 30 – 35   13 – 35 100 – 800 0 – 5
dyn. modulus of elasticity E [MPa] 45,000 | 80,000 38 – 45,000   65 – 120,000  80 – 185,000 22 – 40,000
thermal conductivity  λR [W/m•K] 3 | 6 2.9 – 3.0   1.7 29 – 54 2
specific heat capacity cp [J/g•K] 1.2 | 0.85 0.7 – 0.9   0.85 0.46 – 0.63 1
thermal expansion α[10-6 • K-1] 12 | 7 15 5.5 – 7.5 9.5 – 10.5 10 – 11

Vibration damping

The damping performance of UHPC is comparable with natural stone and epoxy resin-bonded mineral castings and up to ten times better than grey cast iron.
material log. damping decrement Λ damping ratio D [%]
uhpc e45 0.030 0.50   
uhpc e80 0.021 0.33
durfill 0.035 0.56
cast iron gg 0.003 0.05
steel s235 0.001 0.02

temperature resistance

Due to the material-specific high thermal capacity and the low thermal conductivity of UHPC, fluctuating ambient temperatures are only passed on in a very reduced form. Solutions made of UHPC therefore react much more sluggishly to heat build-up than conventional grey cast iron components.

sustainability

Compared to other materials, our high-tech material UHPC has an excellent ecological balance:
 
  • Proven to produce 30 % less primary energy than grey cast iron
  • A project funded by the German Federal Ministry of Education and Research has shown that our UHPC leaves a much more favourable ecological footprint than epoxy resin-bonded mineral casting
  • Easy disposal as construction waste
  • Utilization as recycling material in the construction industry
  • Longer durability and lower material usage than normal concrete

Test reports and certificates

Here you will find all relevant calculations, verifications and test reports on the material properties and behaviour of UHPC for download.