Structure development study of porous concrete with fluidized-bed combustion ash admixture

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F17%3APU126201" target="_blank" >RIV/00216305:26110/17:PU126201 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Structure development study of porous concrete with fluidized-bed combustion ash admixture

Original language description

Because of its correlation between compressive strength and density, autoclaved aerated concrete (AAC) is a very suitable building material for many applications. Optimal macrostructure of the AAC skeleton is composed by small air pores. On the other hand, the well grown crystals of 11 Å tobermorite represent the most important part of the microstructure. The mineral is formed in hyper-alkaline, hydrothermal environment of the CaO – SiO2 – Al2O3 – H2O system. The main objective of this article is to study the influence of the fluidized bed combustion ash, as gypsum and partially lime alternative. Ground quartz sand, with an admixture of fluidized combustion ash, was used as the initial silica material. In order to reach the Ca/Si molar ratio of 0.73, the main silica sources were mixed together. As the instrument for the hydrothermal synthesis, carried out in the saturated steam environment at the pressure of 1.3 MPa and 185 °C for 12 hours, a laboratory autoclave was used. As the parameters determined to analyse physical-mechanical properties of the samples, density and compressive strength were chosen. X-ray diffraction method was used to observe the growth of the main mineralogical phases and scanning electron microscope (SEM) was used for crystal observation. From the results it is apparent that the fluidized bed combustion ash had a significant influence to tobermorite crystallization and formation.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Waste forum

ISSN

1804-0195

e-ISSN

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Volume of the periodical

2017

Issue of the periodical within the volume

4

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

9

Pages from-to

267-275

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-85038614885