The Influence of Secondary Raw Materials on Tobermorite Formation in Calcium-Silicate Composites

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F18%3APU130249" target="_blank" >RIV/00216305:26110/18:PU130249 - isvavai.cz</a>

Result on the web

<a href="http://www.wasteforum.cz/cisla/WF_4_2018.pdf" target="_blank" >http://www.wasteforum.cz/cisla/WF_4_2018.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The Influence of Secondary Raw Materials on Tobermorite Formation in Calcium-Silicate Composites

Original language description

The physical-mechanical properties of calcium-silicate composites depend on their microstructure, which itself, in autoclaved aerated concrete especially, depends on the formation and morphology of the calcium hydrosilicate phases. The main one of these phases is tobermorite, which is what this paper is focused on. Two secondary raw materials representing two main groups of by-products are discussed. Namely, these are fluidized bed combustion fly ash and slag produced by the incineration and power plants. Studying the utilisation of secondary raw materials has become a necessity for both environmental and financial reasons. Selected raw materials were mixed with lime only. In this way, the conditions eliminating the effects of other impurities were ensured. The material’s molar ratio of calcium oxide to silicon dioxide was 0.73 and 1.0. The material samples were then autoclaved at two temperatures (170 and 190 °C) and three different hydrothermal durations (4, 8 and 16 hours). The results indicate that slag appears to be promising material. Samples containing slag reached the same compressive strength as reference samples at 190°C with a molar C/S ratio of 0.73.

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

<a href="/en/project/GA17-14198S" target="_blank" >GA17-14198S: Kinetics of silicon micro-structure creation in dependence on hydrothermal conditions and type of used materials</a><br>

Continuities

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

Publication year

2018

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

2018

Issue of the periodical within the volume

4

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

9

Pages from-to

467-475

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-85060051683