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Effectiveness of treatment methods on polypropylene fibres incorporated in cement mortars
Date
2019-06-01
Author
Ince, Ceren
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Fibre reinforcements are often used in cementitious materials to provide enhanced strength. However, the surface smoothness and inert chemical nature of polypropylene fibres result in an insufficient fibre-matrix bonding interface and hence lead to poor mechanical properties of these materials. Two distinct treatment methods, namely, porofication method and sulfuric acid-dichromate treatment method, are adopted to assess the effectiveness of these techniques on fibre-matrix interface properties. The paper begins with an investigation on the effectiveness of these methods on polypropylene fibres. The wetting characteristics of these fibres are determined using the water absorption test, contact angle measurements and scanning electron microscopy analysis. The study then focuses on the mechanical properties and durability of cement mortars incorporating treated polypropylene fibres. The void ratio, flexural and compressive strengths and split tensile strength are studied, and microstructural analyses are also carried out to support these measurements. The resistance to impact, freeze and thaw and carbonation of cement mortars incorporating treated polypropylene fibres is investigated. The treatment methods adopted in this study improve the interface between the hydrated cement product and fibres and also significantly enhance the mechanical properties and durability of these mortars incorporating polypropylene fibres.
Subject Keywords
Material characterisation
,
Polymeric materials
,
Mechanical properties
URI
https://hdl.handle.net/11511/63871
Journal
EMERGING MATERIALS RESEARCH
DOI
https://doi.org/10.1680/jemmr.18.00098
Collections
Engineering, Article
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C. Ince, “Effectiveness of treatment methods on polypropylene fibres incorporated in cement mortars,”
EMERGING MATERIALS RESEARCH
, pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/63871.