Binders and Concrete Additions


Dr.-Ing. Anne Heisig

Investigations with fresh and hardened mortar:

  • According to current regulations (e.g. DIN EN 196 , DIN EN 1015)
  • Determination of air void content in fresh mortar, density and consistency
  • Soundness according to Le Chatelier
  • Determination of setting times
  • Determination of dynamic Young’s modulus
  • Evolution of hard mortar properties (compressive strength, flexural strength)

Performance of physical investigations:

  • Mercury intrusion porosimetry, porosity and pore size distribution
  • Particle size distribution with laser granulometry
  • Particle size distribution with air jet sieving
  • Specific surface according to Blaine or BET

Special testing methods and investigations:

  • Determination of rheological properties (rotation viscosimeter)
  • Mineralogical investigations with X-ray diffraction, quantitative analysis according to Rietveld
  • ASR investigations according to the Alkali Guide Line
  • Elution, leaching (DEV S4, tank test)
  • Mobilization of environmentally relevant substances according to pH static method
  • Permeability
  • Heat flow calorimetry
  • Differential scanning calorimetry / thermogravimetry

Approved testing laboratory for approval and external monitoring tests:

  • Concrete additions (silica fume, fly ash)
  • Concrete admixtures
  • Cement

Approved testing laboratory for testing aggregate according to the Alkali Guide Line, Part 3