Author, institution: Evaldas Šerelis, Kaunas University of Technology
Science area, field: Technological Sciences, Civil Engineering – 02T
The Doctoral Dissertation is available at the library of Kaunas University of Technology (K. Donelaičio St. 20, Kaunas).
Scientific Supervisor: Prof. dr. Vitoldas VAITKEVIČIUS (Kaunas University of Technology, Technological Sciences, Civil Engineering – 02T).
Doctoral dissertation defense board in the field of Civil engineering:
Prof. Dr. Raimondas BLIŪDŽIUS (Kaunas University of Technology, Technology sciences, Civil Engineering – 02T) – Chairman
Prof. Dr. Darius Bačinskas (Vilnius Gediminas Technical University, Technology sciences, Civil Engineering – 02T – 02T),
Prof. Dr. Žilvinas Bazaras (Kaunas University of Technology, Technology sciences, Civil Engineering – 02T),
Prof. Dr. Targo Kalamees(Tallinn University of Technology, Technology sciences, Civil Engineering – 02),
Prof. Dr. Rimvydas Kaminskas (Kaunas University of Technology, Technology sciences, Civil Engineering – 02T)
Annotation:
In the dissertation main properties of ultra-high performance concrete UHPC (≥100 MPa) with local raw materials was investigated. Silica fume and glass powder were used as pozzolanic materials. Using local materials and by substituting silica fume to glass powder was created UHPC mixture with compressive strength greater than 200 MPa. Created new mixture was modified by incorporating micro steel fibres and thus flexural strength was increased from 7 MPa up to 36 MPa. Modified mixture was further researched in Munich University of Technology. The microstructure of UHPC was investigated by mercury intrusion porosimetry test method, X-ray diffraction analysis and 29Si MAS nuclear magnetic resonance analysis. Additional durability tests methods were carried out and there was no evident that glass powder has any deleterious effect on microstructure of UHPC. On the contrary, properties of UHPC with glass powder were significantly improved. In many types of concrete utilization of glass powder is not possible, however due to unique structure of ultra-high performance concrete, glass powder can substitute some portion of Portland cement, silica fume and quartz powder. Thus can be solved some environmental issues and reduced final price of ultra-high performance concrete. Created mixture can be perfectly used in manufacturing columns, beams, slabs, wall panels and etc.
