Influence of fluidized bed combustion fly ash admixture on hydrothermal synthesis of tobermorite in the mixture with quartz sand, high temperature fly ash and lime

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F19%3APU135066" target="_blank" >RIV/00216305:26110/19:PU135066 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0950061819324754" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0950061819324754</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.conbuildmat.2019.117033" target="_blank" >10.1016/j.conbuildmat.2019.117033</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of fluidized bed combustion fly ash admixture on hydrothermal synthesis of tobermorite in the mixture with quartz sand, high temperature fly ash and lime

Popis výsledku v původním jazyce

Autoclaved aerated concrete (AAC) microstructure consists of tobermorite, which is formed in the strongly alkaline and hydrothermal environment of the CaO – SiO2 – Al2O3 – H2O system and is the main contributor to the strength of AAC. This paper addresses the influence of fluidized bed combustion fly ash (FBC ash) on the formation of tobermorite, and the properties and structure of autoclaved composite. To give the best account of the influence of individual input materials, tests are conducted on samples without aluminum powder, therefore the samples did not have a porous structure. Quartz sand, high temperature fly ash and lime were used as input materials, FBC ash was used as an admixture (10, 30 and 50%). The main components were mixed to achieve a molar ratio of 0.73 for CaO/SiO2. The hydrothermal reaction was carried out in saturated water vapor at 190 C for 16 h. The main mineralogical phases and microstructure were examined using X-ray diffraction analysis and Scanning Electron Microscope. It was found that fluidized bed combustion fly ash has significant influence on the formation and crystallization of tobermorite and increases compressive strength of the samples of up to 2.5 times after 30 and 50% additions of FBC ash.

Název v anglickém jazyce

Influence of fluidized bed combustion fly ash admixture on hydrothermal synthesis of tobermorite in the mixture with quartz sand, high temperature fly ash and lime

Popis výsledku anglicky

Autoclaved aerated concrete (AAC) microstructure consists of tobermorite, which is formed in the strongly alkaline and hydrothermal environment of the CaO – SiO2 – Al2O3 – H2O system and is the main contributor to the strength of AAC. This paper addresses the influence of fluidized bed combustion fly ash (FBC ash) on the formation of tobermorite, and the properties and structure of autoclaved composite. To give the best account of the influence of individual input materials, tests are conducted on samples without aluminum powder, therefore the samples did not have a porous structure. Quartz sand, high temperature fly ash and lime were used as input materials, FBC ash was used as an admixture (10, 30 and 50%). The main components were mixed to achieve a molar ratio of 0.73 for CaO/SiO2. The hydrothermal reaction was carried out in saturated water vapor at 190 C for 16 h. The main mineralogical phases and microstructure were examined using X-ray diffraction analysis and Scanning Electron Microscope. It was found that fluidized bed combustion fly ash has significant influence on the formation and crystallization of tobermorite and increases compressive strength of the samples of up to 2.5 times after 30 and 50% additions of FBC ash.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/GA17-14198S" target="_blank" >GA17-14198S: Kinetika tvorby mikrostruktury silikátů v závislosti na hydrotermálních podmínkách a typu vstupních surovin</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Construction and building materials

ISSN

0950-0618

e-ISSN

1879-0526

Svazek periodika

230

Číslo periodika v rámci svazku

2020

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

1-11

Kód UT WoS článku

000504367400107

EID výsledku v databázi Scopus

2-s2.0-85072713101