Właściwości materiałów cementowych wzmacnianych odpornymi na środowisko zasadowe włóknami szklanymi, jako odpowiedniego materiału do zastosowań naprawczych

• Autorzy: Arabi Nourredine

Identyfikatory

DOI

10.32047/CWB.2020.25.6.3

Warianty tytułu

EN

Properties of cementitious materials reinforced with alkali-resistant glass fibres as a suitable material for repair applications

• Języki publikacji: PL EN

Abstrakty

PL

Zbadano matrycę cementową, wzmocnioną włóknami szklanymi, jako odpowiedniego materiału do naprawy uszkodzonych konstrukcji. Zastosowano dwa podejścia do projektowania mieszanek: w pierwszym z nich stosowano konwencjonalną zaprawę, w drugim różne proporcje cementu i piasku, w celu wyboru najlepszej mieszanki. Osiągnięto korzystny stosunek urabialności z zawartością włókien. Stwierdzono, że stosunek cementu do piasku jest kluczowy dla urabialności mieszanki i powinien zawierać się w zakresie od 0,4 do 0,5. W doświadczeniach stosowano trzy długości włókien – 3, 6 i 12 mm. Przeprowadzono próby ściskania i zginania oraz zbadano zmiany skurczu, dla różnych zawartości i długości włókien. Stwierdzono poprawę wytrzymałości na zginanie zapraw cementowych wzmocnionych włóknami szklanymi, zwłaszcza gdy długość włókien zwiększono do 12 mm, w przypadku ich zawartości wynoszącej 2%. Wytrzymałość na ściskanie zmniejszyła się wraz z większą zawartością włókien.

EN

The cement matrix reinforced with glass fibres was studied as a suitable material for the repair of damaged structures. Two approaches to mixture designs were tested: the first used a conventional mortar and the second with various cement-sand ratios to optimise the mixture. A compromise between the workability and high fibre ratio was achieved. Cement/sand ratio was found to be crucial for the workability of the mixes, with optimal values within the range 0.4-0.5. Three fibre lengths: 3, 6, and 12 mm were tested. Compression and flexural tests were carried out as well as the measurements of shrinkage evolution, which is a critical factor. Improvement was observed in the flexural behaviour of glass fibres reinforced cement mortars when the fibre length was increased to 12 mm with a glass fibre content of 2%. However, the compressive strength decreased with higher fibre content.

Słowa kluczowe

PL

włókno szklane; matryca cementowa; właściwości; urabialność; wytrzymałość na zginanie; materiał naprawczy

EN

glass fibre; cement matrix; properties; workability; flexural strength; repair material

• Wydawca: Fundacja Cement, Wapno, Beton
• Czasopismo: Cement Wapno Beton
• Rocznik: 2020
• Tom: R. 25, nr 6
• Strony: 457--468
• Opis fizyczny: Bibliogr. 34 poz., il., tab.

Twórcy

autor

Arabi Nourredine

• Materials Geomaterials and Environment Laboratory, Badji Mokhtar Annaba University, Annaba, Algeria

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).