Characteristics of Fibres Based on Secondary Raw Materials and Their Use in Concrete Technology

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F24%3APU151395" target="_blank" >RIV/00216305:26110/24:PU151395 - isvavai.cz</a>

Výsledek na webu

<a href="https://ojs.cvut.cz/ojs/index.php/APP/article/view/9868" target="_blank" >https://ojs.cvut.cz/ojs/index.php/APP/article/view/9868</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/APP.2024.47.0121" target="_blank" >10.14311/APP.2024.47.0121</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Characteristics of Fibres Based on Secondary Raw Materials and Their Use in Concrete Technology

Popis výsledku v původním jazyce

Different types of fibres in cementitious composites, particularly in concrete, are currently used for a number of reasons. Fibres are being added to improve mechanical properties (especially steel and glass fibres), to increase the durability – to reduce occurrence of microcracks during the concrete aging (mainly synthetic and cellulose fibres), or to increase the fire resistance (polypropylene fibres). Within the study, characterization of different types of alternative fibres (fibres generated during waste recycling that would otherwise end in incinerators or landfills) with possible use in cementitious composites. These were fibres from recycled PET bottles, paper, and mineral wool, whose properties were compared to the traditionally used cellulose and polypropylene fibres. In the experimental part, the thickness, length, shape, and surface of individual fibres were monitored by an optical microscope. Furthermore, the amount of heat of combustion was determined by the calorimetric method, and the differential thermal analysis (DTA) was carried out for determination of the impact of high temperature on monitored fibres. The microstructure of fibres was monitored using a scanning electron microscope. The focus of the experimental study was on fibres usable in concrete and capable of enduring high temperature stress.

Název v anglickém jazyce

Characteristics of Fibres Based on Secondary Raw Materials and Their Use in Concrete Technology

Popis výsledku anglicky

Different types of fibres in cementitious composites, particularly in concrete, are currently used for a number of reasons. Fibres are being added to improve mechanical properties (especially steel and glass fibres), to increase the durability – to reduce occurrence of microcracks during the concrete aging (mainly synthetic and cellulose fibres), or to increase the fire resistance (polypropylene fibres). Within the study, characterization of different types of alternative fibres (fibres generated during waste recycling that would otherwise end in incinerators or landfills) with possible use in cementitious composites. These were fibres from recycled PET bottles, paper, and mineral wool, whose properties were compared to the traditionally used cellulose and polypropylene fibres. In the experimental part, the thickness, length, shape, and surface of individual fibres were monitored by an optical microscope. Furthermore, the amount of heat of combustion was determined by the calorimetric method, and the differential thermal analysis (DTA) was carried out for determination of the impact of high temperature on monitored fibres. The microstructure of fibres was monitored using a scanning electron microscope. The focus of the experimental study was on fibres usable in concrete and capable of enduring high temperature stress.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA21-25813S" target="_blank" >GA21-25813S: Studium vlivu organických vláken na vlastnosti cementových kompozitů při extrémním zatěžování</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

Modern Concrete and Composites 2023

ISBN

978-80-01-07309-4

ISSN

2336-5382

e-ISSN

—

Počet stran výsledku

7

Strana od-do

121-127

Název nakladatele

Czech Technical University in Prague

Místo vydání

Prague

Místo konání akce

Nové Město na Moravě

Datum konání akce

11. 10. 2023

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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