Surface treated polypropylene (PP) fibres for reinforced concrete

Surface treatments on a polypropylene (PP) fibre have contributed to the improvement of fibre/concrete adhesion in fibre-reinforced concrete. The treatments to the PP fibre were characterized by contact angle measurements, ATR-IR and XPS to analyse chemical alterations. The surface topography and fi...

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Bibliographic Details
Published in:Cement and concrete research 2013-12, Vol.54, p.29-35
Main Authors: López-Buendía, Angel M., Romero-Sánchez, María Dolores, Climent, Verónica, Guillem, Celia
Format: Article
Language:English
Subjects:
Adhesion
Applied sciences
Buildings. Public works
Concretes
Concretes. Mortars. Grouts
Exact sciences and technology
FIBERS
Fibre reinforced concrete (including asbestos cement)
Fibre reinforcement (E)
Fibres
High-Performance Concrete (E)
INTERACTIONS
Materials
MATERIALS SCIENCE
MECHANICAL PROPERTIES
MICROSTRUCTURE
Microstructure (B)
MINERALS
Other special applications (sand concrete, roller compacted concrete, heavy concrete, architectural concrete, etc.)
POLYPROPYLENE
Polypropylene fibre
Polypropylenes
REINFORCED CONCRETE
ROUGHNESS
SCANNING ELECTRON MICROSCOPY
SURFACE TREATMENTS
SURFACES
TOPOGRAPHY
X-RAY PHOTOELECTRON SPECTROSCOPY
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Summary:Surface treatments on a polypropylene (PP) fibre have contributed to the improvement of fibre/concrete adhesion in fibre-reinforced concrete. The treatments to the PP fibre were characterized by contact angle measurements, ATR-IR and XPS to analyse chemical alterations. The surface topography and fibre/concrete interaction were analysed by several microscopic techniques, namely optical petrographic, and scanning electron microscopy. Treatment modified the surface chemistry and topography of the fibre by introducing sodium moieties and created additional fibre surface roughness. Modifications in the fibre surface led to an increase in the adhesion properties between the treated fibres and concrete and an improvement in the mechanical properties of the fibre-reinforced concrete composite as compared to the concrete containing untreated PP fibres. Compatibility with the concrete and increased roughness and mineral surface was also improved by nucleated portlandite and ettringite mineral association anchored on the alkaline PP fibre surface, which is induced during treatment.
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2013.08.004