| Abstract [eng] |
The circular economy is gaining more and more popularity in the field of construction. One of the unexploited niches could be the use of the municipal waste stream in the production of construction products, which would allow to reduce not only the amount of waste thrown into landfills, but also allow to save a significant amount of energy, that could reduce the amount of greenhouse gases (CO2) emitted into the environment. Waste glass extracted from the municipal waste stream could be an excellent material that could be used in the production of a new generation of binder, which could be used to produce various types of concrete. Waste glass has unique properties that not only go well with Portland cement, but also make it possible to obtain concrete products with better physical, mechanical and durability properties. The experimental study examined two types of waste glass extracted from the municipal waste stream: unwashed and washed. In the research the glass powder were prepared from glass shards by milling process, and the microstructure of waste glass powder was analyzed by scanning electron microscope. The influence of waste glass on Portland cement binder processes was examined by semi-adiabatic calorimetry test method, the influence of ground glass on concrete density, compressive strength, porosity was determined, and the resistance of concrete with ground glass to surface freezing was determined. During the study, a binder was developed that used about 150 kg/m3 of Portland cement and utilized up to 1000 kg/m3 of waste glass powder from municipal waste stream. A new generation of binder can be produced with the newly developed concrete, which has the compressive strength vary from 90 MPa to 160 MPa. These values could correspond to the strengths of high performance and ultra-high performance concrete, and would be characterized by a particularly high resistance to salt-scaling. Master‘s thesis consists of 60 pages of text, 10 tables, 50 figures, 42 references. |
