Dr. rer. nat. Dr.-Ing. h. c., Prof. emer.
Director, Aedificat Institute Freiburg
Professor, Qingdao Technological University



Curriculum Vitae Curriculum Vitae
Research Research
Teaching Teaching
published papers published papers
Books and Proceedings Books and Proceedings
Other Activities Other Activities
Awards Awards
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Sustainability of building materials and structures
  • Prediction of service life of reinforced concrete structures by means of probabilistic models
  • Optimizing energy consumption and environmental pollution with respect to designed service life of reinforced concrete structures
  • Use of industrial by-products such as lime to produce high performance low energy building materials
  • Reduction of mass flow in construction industry

Durability and Preventive Measures to Protect Reinforced Concrete and Concrete Structures

  • Chloride penetration by capillary suction during exposure to sea water in the tidal zone and salt solutions, prediction of service life of reinforced concrete structures
  • Observation of chloride penetration depth in old reinforced concrete structures and comparison with prediction models
  • Investigations into the effectiveness of surface impregnation of concrete with water repellent agents (silanes and siloxanes)
  • Effectiveness of integral water repellent treatment as a chloride barrier
  • Durability and service life under combined mechanical and environmental loads


Strain hardening cement-based composites (SHCC)

  • Optimization of strain hardening cement-based composites with respect to crack formation and durability
  • Characterization of strain hardening cement-based composites under imposed strains for realistic design
  • Potential for applications in practice


Shrinkage of concrete

  • Drying and moisture gradients, crack formation
  • Mechanisms of shrinkage of nano-porous materials such as hardened cement paste
  • Shrinkage of water repellent treated concrete


Mechanics of composite materials

  • Simulation of the structure of composite materials
  • Determination of fracture mechanics parameters by means of inverse analysis
  • Damage of composite structures under combined mechanical and environmental loads
  • Size effect on fracture mechanics parameters
  • Influence of surface energy on strength and strain softening
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