The laboratory investigation on the influence of the polypropylene fibres on selected mechanical properties of hardened self-compacting concrete

• Autorzy: Pająk M. , Ponikiewski T.
• Języki publikacji: EN

Abstrakty

EN

The laboratory investigation presented in the paper focuses on the influence of the polypropylene fibres on compressive and flexural strength of self-compacting concrete. The paper deals with two volume ratios 0.3% and 0.9% of 19 mm and 38 mm long PP fibres. On the basis of the tests performed, the addition of PP fibres has a minor effect on compressive strength of SCC and pronounced when analysing the flexural tensile strength of the matrix. In case of 19 mm long fibres the increase of post-peak parameters was considerable, however, not proportional to the fibres volume ratio. The 38 mm long PP fibres applied as a SCC reinforcement needs further investigations, as for a smaller amount of the fibres it doesn’t meet the requirements for the composites.

PL

W pracy przeanalizowano wpływ włókien polipropylenowych na wytrzymałość na ściskanie i właściwości przy zginaniu betonu samozagęszczalnego. Badania laboratoryjne dotyczyły betonu SCC zbrojonego polipropylenowymi włóknami o długościach 19 mm i 38 mm przy ich udziale objętościowym wynoszącym 0.3% i 0.9%. Na podstawie przeprowadzonych badań stwierdzono, że zastosowane włókna mają niewielki wpływ na wytrzymałość SCC na ściskanie, a znaczący przy analizie wytrzymałości na rozciągnie przy zginaniu. Wyniki badań zginania betonu SCC zbrojonego włóknami o długości 19 mm wykazały wzrost parametrów w zakresie po-sprężystej pracy SCC. Uzyskane wyniki, nie były jednak proporcjonalne do przyrostu zawartości objętościowej włókien. Beton samozagęszczalny zbrojony dłuższymi włóknami (38 mm) wymaga dalszych badań, gdyż w przypadku zastosowania mniejszej zawartości objętościowej włókien nie zostały spełnione wymagania stawiane kompozytom w zakresie pracy po-sprężystej.

Słowa kluczowe

EN

compressive strength; flexural tensile strength; polypropylene fibre; self-compacting concrete

PL

wytrzymałość na ściskanie; wytrzymałość na rozciąganie przy zginaniu; włókna polipropylenowe; beton samozagęszczalny

• Wydawca: Silesian University of Technology
• Czasopismo: Architecture Civil Engineering Environment
• Rocznik: 2015
• Tom: Vol. 8, no. 3
• Strony: 69--78
• Opis fizyczny: Bibliogr. 19 poz., tab., rys., wykr.

Twórcy

autor

Pająk M.

• Faculty of Civil Engineering, The Silesian University of Technology, Akademicka 5, 44-100 Gliwice, Poland

autor

Ponikiewski T.

• Faculty of Civil Engineering, The Silesian University of Technology, Akademicka 5, 44-100 Gliwice, Poland

Bibliografia

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