| Abstract [eng] |
The cement industry is responsible for ~7% of global CO2 emissions. Studies show that strategies such as traditional clinker additives, alternative fuels and more efficient energy use are not enough, and engineering solutions alone will not achieve CO2 reduction goals. Thus, the search for new alternative cement materials with a lower CO2 footprint than Portland cement is one of the main challenges facing the scientific community and the cement industry. Scientists at the Department of Silicates Technology at KTU conduct extensive research into alternatives to Portland cement, intensively looking for opportunities to replace the binder with environmentally friendly materials or waste. The aim of the master's thesis is to investigate the possibility of replacing part of Portland cement with bypass dust in concretes hardening in a CO2 environment without deteriorating their properties. This work investigates the influence of the bypass dust additive on the properties and mineral composition of concretes hardening in a CO2 environment. X-ray diffraction analysis, X-ray fluorescence analysis, simultaneous thermal analysis, CO2 gas determination by calcimeter, density and compressive strength determination were used. The work presents detailed conclusions, compares the results of hardened samples without additive and with it, and predicts the prospects for waste utilization. A principle technological scheme of products hardening in a CO2 environment is presented. |
