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Properties of Fresh Macro Basalt Fibre (MiniBar) Self-Compacting Concrete (SCC) and Coventional Slump Concrete (CSC) Aimed for Marine Applications
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Concrete Structures. NTNU i Ålesund.
2015 (English)In: Nordic Concrete Research, ISSN 0800-6377, Vol. 52, no 1, 43-61 p.Article in journal (Refereed) Published
Abstract [en]

Macro basalt fibres (MiniBar) with high corrosion resistance could be a suitable material in fibre concrete for marine applications. Due to the lack of knowledge about macro basalt fibre concretes (BFCs), the main objective of this paper is to assess the fresh state properties of macro basalt fibre conventional slump concrete and self-compacting concrete as the first step of developing BFC for concrete barges for fish farming on the west coast of Norway. To satisfy the requirements for marine applications, DNV and NS-EN standard rules are employed as the basis for the durability performance design. The concrete mix is designed to achieve densely compacted matrix by using the modified Andreasen & Andersen model as the particle size distribution target. In this paper, slump, flow-ability, passing-ability, fibre dynamic segregation and also flow rate as an indication for viscosity of different BFCs are measured and analysed. The result shows that there is a possibility to produce BF-SCCs with a fibre content of 1.15%. The fibres have an aspect ratio of 65.15. In addition, the mixture composed of a maximum gravel size of 16 mm shows a higher flowability in comparison with the maximum gravel size of 12 mm.

Place, publisher, year, edition, pages
Ålesund: NORSK BETONGFORENING , 2015. Vol. 52, no 1, 43-61 p.
Keyword [en]
Macro Basalt Fibre, Self-Compacting Concrete, Marine Application, Particle Packing Model
National Category
Infrastructure Engineering Building Technologies
Research subject
Civil and Architectural Engineering
Identifiers
URN: urn:nbn:se:kth:diva-188004OAI: oai:DiVA.org:kth-188004DiVA: diva2:933030
Note

QC 20160607

Available from: 2016-06-02 Created: 2016-06-02 Last updated: 2016-06-07Bibliographically approved
In thesis
1. Use of Macro Basalt Fibre Concrete for Marine Applications
Open this publication in new window or tab >>Use of Macro Basalt Fibre Concrete for Marine Applications
2016 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Deterioration of concrete structures due to the corrosion of embedded steel is a well-known universal problem. Norway with its numerous bridges, ports, offshore and floating structures along its coastline, is also encountered with corrosion degradation. The harsh environment of the Norwegian Sea regarding its low temperature, wind, and waves, makes the design and construction of marine structures more demanding. In recent years, usage of sustainable composite materials in the field of structural engineering has been rising. The usage of natural fibre reinforced polymer materials in the form of reinforcement bars or macro fibres with a low density, high strength, and excellent corrosion resistance, gives us better choices for the design and construction of marine structures. Our knowledge about the fibre reinforced self-compacting concrete has increased as a result of introducing it as a building material some decades ago. However, more research is still needed when it comes to the application of new types of fibres. This thesis is a result of this need, whereby the author has done two series of experimental programmes regarding the subject. In the first series, the flow characteristics of fresh state, conventional and self-compacting macro basalt fibre concrete were studied. In the second series, mechanical properties of high performance and medium strength macro basalt fibre concrete including the post-cracking behaviour, compressive strength and electrical resistivity were in focus. The findings were presented in three appended papers and the extended summary composing this thesis. Additionally, the thesis presents an overview of the design procedure of floating concrete structures and the possibility of using macro basalt fibre concrete via a case study. The author’s literature review shows that basalt fibres have an adequate resistance against alkali environment of the concrete matrix and corrosive environment of seawater.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2016. xiv, 35 p.
Series
TRITA-BKN. Bulletin, ISSN 1103-4270 ; 140
Keyword
Concrete Barges, Reinforcement Corrosion, Floating Structures, Macro Basalt Fibres, Self-Compacting Fiber Concrete
National Category
Civil Engineering
Research subject
Civil and Architectural Engineering
Identifiers
urn:nbn:se:kth:diva-188010 (URN)
Presentation
2016-06-10, B1, Kungliga Tekniska högskolan, Brinellvägen 23, KTH-Campus, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20160607

Available from: 2016-06-07 Created: 2016-06-03 Last updated: 2016-06-07Bibliographically approved

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