ARTÍCULO

Effect of a polypropylene fibre on the behaviour of aerial lime-based mortars

Autores: Izaguirre Eseverri, Ana Avelina; Lanas González, Javier; Álvarez Galindo, José Ignacio
Título de la revista: Construction and Building Materials
ISSN: 0950-0618
Volumen: 25
Número: 2
Páginas: 992 - 1000
Fecha de publicación: 2011
Resumen:
A polypropylene fibre was added to lime-based mortars in order to check whether they were improved by this admixture. Different properties of lime-based mortars were evaluated: fresh state behaviour through water retention, air content and setting time; hardened state properties such as density, shrinkage, water absorption through capillarity, water vapour permeability, long-term flexural and compressive strengths, pore structure through mercury intrusion porosimetry, and durability assessed by means of freezing-thawing cycles. An improvement in some properties of aerial lime-based mortars - such as permeability, mechanical strengths, reduction in macroscopic cracks or durability in the face of freezing-thawing cycles - was achieved when fibre was added at a low dosage. When a larger amount of additive was used, only the reduction in cracks and the durability of the material were improved.