Effect of a polypropylene fibre on the behaviour of aerial lime-based mortars
Keywords: 
Admixture
Durability
Freezing and Thawing
Mechanical properties
Lime mortar
Polypropylene fibre
Issue Date: 
Feb-2011
Publisher: 
Elsevier
ISSN: 
0950-0618
Citation: 
Izaguirre A, Lanas J, Alvárez JI. Effect of a polypropylene fibre on the behaviour of aerial lime-based mortars. Constr Build Mater 2011; 25(2):992-1000
Abstract
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.

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