Dissolution Calorimetry Study of Basalt Fibers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00371621" target="_blank" >RIV/68407700:21110/23:00371621 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/5.0162113" target="_blank" >http://dx.doi.org/10.1063/5.0162113</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0162113" target="_blank" >10.1063/5.0162113</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dissolution Calorimetry Study of Basalt Fibers

Popis výsledku v původním jazyce

Basalt fibers and Basalt Fibers Reinforced Polymer (BFRP) bars are currently widely studied as alternative elements for reinforcement of concrete subjected to an aggressive media, especially to sea water, where conventional streel reinforcing elements are suffering intensive corrosion. Nevertheless not even the basalt based reinforcing elements are completely stable in a range of environment which may be attacking the concrete. The first step of a corrosion process of basalt fibers is their interaction with aggressive solution, which may result to a chemical reaction between fiber and a component of medium and consequent dissolution of fiber (and possibly followed by precipitation of a solid corrosion product). The present paper aims to characterize the initial – dissolution – step of interaction of basalt fibers with five types of solutions (from acid to alkaline) which are attacking basalt fibers in concrete by help of isothermal calorimetry. The obtained results proved that basalt fibers are reacting with acid, alkaline and salty solutions. The most intensive endothermic heat flow appears in all solutions (except water) after a few minutes; nevertheless certain measureable heat flow was generated for at least 6 hours of reaction. High pH of solution is responsible for higher (absorbed) total heat and longer reaction duration. This study will continue by attempt to characterize the reaction products by SEM and XRD, as well as to describe the reaction kinetics in a longer time scale than is covered by calorimetry.

Název v anglickém jazyce

Dissolution Calorimetry Study of Basalt Fibers

Popis výsledku anglicky

Basalt fibers and Basalt Fibers Reinforced Polymer (BFRP) bars are currently widely studied as alternative elements for reinforcement of concrete subjected to an aggressive media, especially to sea water, where conventional streel reinforcing elements are suffering intensive corrosion. Nevertheless not even the basalt based reinforcing elements are completely stable in a range of environment which may be attacking the concrete. The first step of a corrosion process of basalt fibers is their interaction with aggressive solution, which may result to a chemical reaction between fiber and a component of medium and consequent dissolution of fiber (and possibly followed by precipitation of a solid corrosion product). The present paper aims to characterize the initial – dissolution – step of interaction of basalt fibers with five types of solutions (from acid to alkaline) which are attacking basalt fibers in concrete by help of isothermal calorimetry. The obtained results proved that basalt fibers are reacting with acid, alkaline and salty solutions. The most intensive endothermic heat flow appears in all solutions (except water) after a few minutes; nevertheless certain measureable heat flow was generated for at least 6 hours of reaction. High pH of solution is responsible for higher (absorbed) total heat and longer reaction duration. This study will continue by attempt to characterize the reaction products by SEM and XRD, as well as to describe the reaction kinetics in a longer time scale than is covered by calorimetry.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA21-00800S" target="_blank" >GA21-00800S: Chemické a fyzikální interakce výztuže na čedičové bázi s cementovou matricí</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

International Conference of Numerical Analysis and Applied Mathematics ICNAAM 2021

ISBN

978-0-7354-4589-5

ISSN

0094-243X

e-ISSN

1551-7616

Počet stran výsledku

4

Strana od-do

—

Název nakladatele

AIP Publishing

Místo vydání

Melville, NY

Místo konání akce

Rodos

Datum konání akce

20. 9. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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