Concrete modification by EvoCrete®

Concrete modification by EvoCrete®
Concrete modification by EvoCrete®

Green fingerprint in concrete production, 20% reduction in carbon dioxide emissions with the use of EvoCrete® CC.

EvoCrete® CC is a hardening accelerator according to DIN EN 934-2: 2012-08. In addition to the acceleration of the hydration process, further positive properties appear, which make the application of EvoCrete® CC extremely attractive in the production of concrete, both technically and economically.

Concrete mixing calculation

concrete mixing calculation 1
concrete mixing calculation 2

When using EvoCrete® CC, the cement content in the concrete can be reduced by approx. 20%, with constant or 8 to 10% higher ultimate compressive strength of the hardened concrete. Due to an extreme increase in bending tensile strength at the early stage of the hydration process, the crack formation in the concrete is significantly reduced to eliminate.
This effect allows the installation of large-format concrete paving slabs from 10 m to 20 m, without reinforcement and a 50% reduction of the expansion joints. The reduction of the expansion joints is accompanied by an increase in travel comfort and a reduction in the maintenance effort for leaky expansion joints.

Different test parameter Sample 1
without EvoCrete® admixture
Sample 2
2% EvoCrete® admixture
Sample 3
4% EvoCrete® admixture
Slump in mm
(acco. to DIN EN 12 350-5)
187 mm 184 mm 188 mm
Air content in %
(acco. to DIN EN 12 350-7)
4,5 Vol. - % 4,8 Vol. - % 5,2 Vol. - %
Fresh concrete bulk density
(acco. to DIN EN 12 350-6)
2.210 kg / cm² 2.200 kg / cm² 2.190 kg / cm²
Compressive strength

EvoCrete® in combination with all these factors means a higher durability, safety and travelling comfort by a reduction of maintenance and costs.

Air-entraining concrete

When EvoCrete® CC is used in combination with air entrainers during concrete production, the radius of the air pores is reduced by 11% at 2% EvoCrete® CC content and 22% at 4% EvoCrete® CC content.

However, the total volume of the air pores is the same for untreated concrete offset with EvoCrete® CC, which means that the number of air pores has increased with a reduced radius. An increased number of air pores means a more homogenous distribution in the concrete and an increasing frost-thaw resistance and a higher deicing salt resistance of the concrete.

Pressure porosimetry

graphic with pore size distribution
table with pore size distribution

Determination of the corrosion behaviour

The corrosion behaviour was tested at the Institute of Building Materials Research in Aachen (ibac). The results shown below were determined during these tests:

graphic with pore size distribution