The aim of this project is to produce concrete, which will harden in CO2 environment. The binder material will be dibasic calcium silicate hydrate ?-C2SH, which will synthesized from silica and limestone raw material. The energy cost will be much lower, because the hydrated mineral will be used, therefore calcination in high temperature operation will be not required. Besides the emission of greenhouse gases will be reduced due to lower amount of limestone in raw meal and consumption of CO2 to inert compound CaCO3 during hardening process.
Project funding:
Project is funded by EU Structural Funds according to the 2014–2020 Operational Programme for the European Union Funds’ Investments priority “Development of scientific competence of researchers, other researchers, students through practical scientific activities” under Measure No. 09.3.3-LMT-K-712.
Project results:
In the project investigated the effect of mixture composition, hydrothermal synthesis and calcination parameters (temperature and duration) on volastonite formation processes, product dispersion and thermal stability. The influence of gaseous CO2 on the hardening process of volastonite binder, its stone structure and properties was investigated too. The proposed technology is environmentally friendly and allows to solve some problems in a complex way: 1) lower sintering temperature reduces energy consumption per unit of production; 2) the raw material mixture contains less limestone than other analogous materials, leading to a significant reduction in CO2 emissions; 3) as the products solidify in a CO2 environment, these greenhouse gases are combined into inert CaCO3.
Period of project implementation: 2019-07-08 - 2019-08-31
Project coordinator: Kaunas University of Technology
