Influence of Polypropylene Fibre Geometry on the Mechanical Properties of Cement Mortars

Broda, J.; Brachaczek, W.

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Tytuł artykułu

Influence of Polypropylene Fibre Geometry on the Mechanical Properties of Cement Mortars

Autorzy

Broda J. , Brachaczek W.

Treść / Zawartość

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Warianty tytułu

Wpływ geometrii włókien polipropylenowych na właściwości mechaniczne zapraw cementowych

Języki publikacji

Abstrakty

In this study, fibrillated polypropylene fibres and fibres with a round and five-arm star cross section were produced. The fibres were chopped to specified lengths and used for the reinforcement of cement mortars. Mortars containing different dosages of fibres were prepared. The compression and bending strength of the mortars were determined and it was noted that the fibres do not affect the compressive strength of the mortars. For reinforced mortars, regardless of the fibre geometry and dosage, the compressive strength is comparable with that of plain mortar. The fibres influence the bending strength of the mortars. For mortars reinforced with fibrillated fibres a significant increase in the bending strength was observed. For mortars which contained other fibres, the effect of the reinforcement on the bending strength was less visible. The increase in the bending strength was explained by the fibre/matrix interaction.

Wyprodukowano polipropylenowe włókna fibrylizowane oraz polipropylenowe włókna o przekroju okrągłym i gwiaździstym. Włókna pocięte na odcinki o określonej długości zastosowano do zbrojenia zapraw cementowych. Wyprodukowano kształtki wykonane z zapraw o różnej zawartości włókien. W czasie badań wyznaczono wytrzymałość kształtek na ściskanie i zginanie. Stwierdzono, że dodatek włókien nie wpływa na wytrzymałość zapraw na ściskanie. Niezależnie od geometrii włókien i ich zawartości wytrzymałość na ściskanie zapraw zbrojonych włóknami jest identyczna z wytrzymałością zapraw niezbrojonych. Natomiast dodatek włókien prowadzi do zmiany wytrzymałości zapraw na zginanie. Dla zapraw zbrojonych włóknami fibrylizowanymi wzrost wytrzymałości na zginanie sięga kilkunastu procent. Dla zapraw zbrojonych pozostałymi włóknami wpływ włókien jest mniej znaczący. Wzrost wytrzymałości na zginanie wyjaśniono w oparciu o oddziaływania pomiędzy włóknami i matrycą cementową.

Słowa kluczowe

mortar fibre reinforcement compressive strength bending strength SEM

zaprawa włókna fibrylizowane wytrzymałość na ściskanie wytrzymałość na zginanie SEM

Wydawca

Sieć Badawcza Łukasiewicz - Łódzki Instytut Technologiczny

Czasopismo

Fibres & Textiles in Eastern Europe

Rocznik

2015

Tom

Vol. 23, no. 2 (110)

Strony

123--129

Opis fizyczny

Bibliogr. 35 poz., rys., tab.

Twórcy

autor

Broda J.

jbroda@ath.bielsko.pl

Institute of Textile Engineering and Polymer Materials, University of Bielsko-Biala, Bielsko-Biała, Poland

autor

Brachaczek W.

Institute of Textile Engineering and Polymer Materials, University of Bielsko-Biala, Bielsko-Biała, Poland

Bibliografia

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Bibliografia

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