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Metodutveckling av utdragsförsök på enskilda fibrer ur betong
University of Borås, Faculty of Textiles, Engineering and Business.
University of Borås, Faculty of Textiles, Engineering and Business.
2016 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Method development of pull-out tests on individual fibres in concrete (English)
Abstract [sv]

Syftet med projektet var att ta fram en fungerande metod för utdragsförsök av enskilda fibrer ur betong, se hur det mekaniska verkningssättet fungerade samt ta fram förslag på provkroppsutformningen. Arbetet har delats upp i tre delar. Den första delen är en litteraturstudie på tidigare forskning kring fiberarmerad betong och vad som har gjorts kring utdragsförsök av enskilda fibrer. Den andra delen handlar om att utveckla en metod för utdragsförsök, inklusive utformning av provkropp, förberedelser samt provningsgenomförande. Den avslutande delen innefattar genomförande av provning på olika fibertyper, utvärdering av resultat samt validering av den föreslagna metoden.

Studien resulterade i en rekommendation för en lättöverskådlig granskning av metoden och metodförloppet som ska göra det enkelt för andra intressenter att utföra liknande provningar. Förslag på vad som kan förbättras har tagits fram.

Abstract [en]

The concrete technology has been used for several centuries and the iron reinforcement technique was first used in the late 1800s. In the 1874 A. Berard, USA, was the first person who applied for a patent for fiber-reinforced concrete and much research has been done on the field since then. In the 1960s the fiber reinforcement technology started in earnest and it has become increasingly common to add fibers to the concrete. Fiber reinforcement is mainly divided into four categories: glass fibers, steel fibers, natural fibers and synthetic fibers; in which carbon fibers are included. When fibers are used in concrete the result is a concrete with improved crack control and increased toughness. The aim of the project was to develop a working method to extract attempts by individual fibers of concrete; see how the mechanical behavior worked; and draft proposals on the specimen design. The work has been divided into three parts. The first part is a literature review of previous research on fiber-reinforced concrete, and what has been done about the excerpts attempts of individual fibers. The second part is to develop a method for excerpts attempts, including the design of the test specimen and preparation. The final part includes the implementation of testing on different types of fiber, evaluation of results and validation of the proposed method.

The study resulted in a recommendation for an easy review of the approach and methodology course that will make it easy for other stakeholders to carry out similar checks. Suggestions on what can be improved have been developed.

Place, publisher, year, edition, pages
2016.
Keyword [sv]
Fiberarmerad betong, dragtest, provkropp, utdragsförsök, dragsteg.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hb:diva-12139OAI: oai:DiVA.org:hb-12139DiVA: diva2:1093537
Available from: 2017-05-09 Created: 2017-05-08 Last updated: 2017-05-09Bibliographically approved

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