| Title |
Biomass fly ash additive for Portland cement and slag cement / |
| Translation of Title |
Biokuro lakiųjų pelenų priedas portlandcemenčiui ir šlakiniam cementui. |
| Authors |
Česnauskas, Vytautas |
| Full Text |
|
| Pages |
38 |
| Keywords [eng] |
biomass fly ash ; slag cement ; cement hydration |
| Abstract [eng] |
As the requirements of the EU environmental and air pollution reduction rules are tightened, the increasing use of renewable energy sources is in progress and the research for new applying possibilities of industrial waste are being sought. One of these sources is biomass. Biomass ashes are rich in amorphous SiO2, therefore it can be used as a mineral additive and / or activator / binder in cement production and / or in concrete as an alternative to commonly used binding materials. A lot of attention also is paid to research of granulated blast furnace slag, its effect on the properties of cement stone and evaluation of slag cement hydration characteristics. The use of this waste in slag cement production results in lower energy consumption and CO2 emissions. Biomass fly ash contains alkaline oxides, therefore its additive in the slag cement could destabilize the glassy state phase in the slag during the cement hydration without additional activation of the slag with other chemical reagents. In this dissertation the effect of tribochemically activated biomass fly ash prepared as micro filler on the hydration of Portland cement minerals, cement stone compressive strength and the resistance to alkali–silica reaction and the sulfate attack are determined. Also provided the impact of activated biomass fly ash on the hydraulic properties of granulated blast furnace slag and slag cement hydration process. Technological recommendations for the application of biomass fly ash additive are proposed and calculation of CO2 emission is given. |
| Dissertation Institution |
Kauno technologijos universitetas. |
| Type |
Summaries of doctoral thesis |
| Language |
English |
| Publication date |
2018 |
