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Investigation of the properties of concrete modified with various fibres

Mukalazi, R and Li, C 2011, 'Investigation of the properties of concrete modified with various fibres', in Vasco Peixoto Freitas and Helena Corvacho (ed.) Proceedings of 12th International Conference on Durability of Building Materials and Components, Porto, Portugal, 12-15 April 2011, pp. 1-8.

Document type: Conference Paper
Collection: Conference Papers

Title Investigation of the properties of concrete modified with various fibres
Author(s) Mukalazi, R
Li, C
Year 2011
Conference name 12th International Conference on Durability of Building Materials and Components
Conference location Porto, Portugal
Conference dates 12-15 April 2011
Proceedings title Proceedings of 12th International Conference on Durability of Building Materials and Components
Editor(s) Vasco Peixoto Freitas and Helena Corvacho
Publisher Faculty of Engineering, University of Porto
Place of publication Porto, Portugal
Start page 1
End page 8
Total pages 8
Abstract The use of concrete modified with fibres requires understanding of its mechanical properties and behaviour, in particular in long terms. Research on the degradation of the mechanical properties under long-term aggressive environment is limited. An experimental program is carried out to study key factors, such as dosage, fibre type, and water to cement ratio that affect the mechanical properties of concrete modified with fibres. Compressive strength, flexural strength, tensile strength and flexural toughness are determined for concrete modified with fibres. Tests, including direct uniaxial tension, three point bending, toughness and compressive strength, are carried out to produce results on important properties of concrete modified by steel and synthetic fibres. Test results presented in the paper are from short term tests which are part of a comprehensive long-term experimental program on steel fibre reinforced concrete exposed to marine environment. Empirical relationships between strengths and test variables are identified from short-term tests. Based on the test results models are developed for mechanical properties of concrete modified with fibres, which are expressed as a function of basic design variables. The developed models are verified with existing data. Modification and potential application of the developed models to prediction of deterioration of fibre concrete strength in long-term marine environment exposure is explored.
Subjects Infrastructure Engineering and Asset Management
Keyword(s) Fibres
Properties
Durability
Long-term
Empirical
Copyright notice © 2011 Fraunhofer IRB
 
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