Impact of operating conditions on the strength and frequency of destruction of fibre-cement composites

• Autorzy: Adamczak-Bugno Anna , Krampikowska Aleksandra

Identyfikatory

DOI

10.24425/ace.2021.137155

Warianty tytułu

PL

Wpływ warunków eksploatacyjnych na wytrzymałość i częstotliwości niszczenia kompozytów cementowo-włóknistych

• Języki publikacji: EN

Abstrakty

EN

The paper examines the impact of possible operational factors on strength and frequency parameters generated by bending of fibre-cement panels. The tests were performed on elements cut out of a standard commercially available panel. The samples were exposed to factors described as environmental (soaking in water, bath-drying cycles, freeze-thawing cycles) and unique (flame ignition and high temperature exposure) and then subjected to three-point bending tests. Acoustic emission (AE) signals were acquired during the external load application. After the measurements were completed, the strength of individual elements was determined and the frequencies generated during bending were calculated. The obtained results were analysed statistically. Comparing the results obtained for a group of samples subjected to environmental and unique factors, significant differences between them were noted. It was noted that the decrease in the strength of the samples is related to the emission of lower frequency sounds. It was found that the application of the presented methodology allows to determine the condition of the fibre-cement boards in use.

PL

W artykule przedstawiono wyniki testów trzypunktowego zginania dla elementów włóknisto-cementowych poddanych działaniu czynników środowiskowych i wyjątkowych z jednoczesną akwizycją sygnałów AE. Analizie poddano wartości wytrzymałości na zginanie oraz częstotliwości generowanych przed momentem zniszczenia. Na podstawie otrzymanych wyników wyciągnięto następujące wnioski: Obniżenie wytrzymałości elementów włóknisto-cementowych wiąże się z generowaniem niższych częstotliwości przy zginaniu w odniesieniu do próbek o niezmienionych parametrach mechanicznych. Zastosowanie metody emisji akustycznej umożliwia śledzenie częstotliwości powiązanych z powstawaniem różnego rodzaju zmian w strukturze materiału. Przebieg procesu niszczenia struktury płyty cementowo-włóknistej jest mechanizmem złożonym i powiązanym w sposób ścisły z obecnością włókien zbrojących oraz stopniem wiązania pomiędzy zbrojeniem a matrycą. Częstotliwości generowane przez zmiany zachodzące w strukturze włókno-cementu są ściśle powiązane z obecnością zbrojenia w postaci włókien oraz stopniem wiązania między zbrojeniem a matrycą. Zastosowanie techniki emisji akustycznej umożliwia skuteczne wykrywanie i monitorowanie inicjacji zmian w strukturze wpływających na obniżenie parametrów mechanicznych płyt. Otrzymane rezultaty dają możliwość zastosowania metody AE do oceny stanu pełnowymiarowych elementach cementowo-włóknistych.

Słowa kluczowe

EN

fibre-cement composite; ventilated façade; acoustic emission method; bending strength

PL

kompozyt cementowo-włóknisty; elewacja wentylowana; metoda emisji akustycznej; wytrzymałość na zginanie

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2021
• Tom: Vol. 67, nr 2
• Strony: 67--83
• Opis fizyczny: Bibliogr. 34 poz., il., tab.

Twórcy

autor

Adamczak-Bugno Anna

• Kielce University of Technology, Faculty of Civil Engineering and Architecture, Kielce, Poland

• https://orcid.org/0000-0003-3314-3801

autor

Krampikowska Aleksandra

• Kielce University of Technology, Faculty of Civil Engineering and Architecture, Kielce, Poland

• https://orcid.org/0000-0002-1784-9989

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).