Subrata Chattopadhyay, Oktay Ural (Eds.); Indian Institute of Technology Kharagpur
Abstract
XXXVI IAHS World Congress on Housing - National Housing Programs-New Visions, November 03–07, 2008, Kolkata, IndiaMortars 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
