The influence of brick residues in the behaviour of lime mortars

• Author(s): Matias, Gina ; Faria, Paulina ; Torres, Isabel
• Date: 2008
• Persistent ID: http://hdl.handle.net/10362/11320
• Origin: Repositório Institucional da UNL
• Subject(s): Lime mortar; Masonry repair; Pozzolan; Brick residues; Mortar behaviour
• Document Type: Conference Object
• Language: English

Description

XXXVI IAHS World Congress on Housing - National Housing Programs-New Visions, November 03–07, 2008, Kolkata, India Mortars have a great repercussion on the durability of a masonry construction due to its protective role. The compatibility among the masonry materials (the masonry units, the mortar of the joints, the plasters and the renders) incites the adequate behaviour of the wall and consequentially an increase in durability. Very often we came across with rehabilitation errors due to the use of incompatible mortars whether with the pre-existing mortar or with the others wall materials, which can origin great pathologies. Repair mortars should be compatible with existent materials. Old mortars were normally air lime based and sometimes had in their composition some other products like brick dust which confer specific properties. Small grains of brick residue can take the role of a particular aggregate and brick dust of a pozzolan, reacting with the calcium hydroxide of the air lime and improving the mortars behaviour. Simultaneously its application has the great advantage of reuse an industrial by-product. With the increasing environmental concerns it is important to find appropriate solutions to the industry residues. In this way we can contribute for a better use of the material resources and to the decrease of deposition of residues in landfills by studying its performance as part of a repair mortar. The propose of this paper is to present the results obtained in an experimental work developed at the University of Coimbra which main goal was to analyze the influence of brick residues coming from an industrial plant in the behaviour of lime mortars to be applied as repair mortars, assuring the compatibility and protection of old masonries.