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Design and evaluation of restoration mortars for historic masonry using traditional materials and production techniques

Published online by Cambridge University Press:  21 March 2011

Antonia Moropoulou ,
Asterios Bakolas ,
Petros Moundoulas ,
Eleni Aggelakopoulou  and
Sofia Anagnostopoulou
Antonia Moropoulou
Affiliation:
Section of Materials Science and Engineering, Department of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou St., Zografou, Athens, Greece
Asterios Bakolas
Affiliation:
Section of Materials Science and Engineering, Department of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou St., Zografou, Athens, Greece
Petros Moundoulas
Affiliation:
Section of Materials Science and Engineering, Department of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou St., Zografou, Athens, Greece
Eleni Aggelakopoulou
Affiliation:
Section of Materials Science and Engineering, Department of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou St., Zografou, Athens, Greece
Sofia Anagnostopoulou
Affiliation:
Section of Materials Science and Engineering, Department of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou St., Zografou, Athens, Greece
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Abstract

Cement based mortars used for historic masonry restoration presented unsatisfactory results, due to their chemical and physico-mechanical incompatibility to original buildings. In the present research, several syntheses of restoration mortars are produced using traditional techniques and materials such as binders (aerial and natural hydraulic lime), pozzolanicadditives (natural and artificial pozzolanas) and aggregates (sand and crushed brick). The technical characteristics of the mortars were determined using mechanical tests (compressive and flexural) and mercury intrusion porosimetry measurements at the time of 1, 3, 9, 15 months of curing. Water absorption measurements were performed at the time of 9 and 15 months curing, in order to evaluate mortars microstructural characteristics, their rate of water absorption and the total percentage of absorbed water. The aerial lime - artificial pozzolana mortar presented the best mechanical and microstructural performance. Hydraulic mortars acquired the maximum of the mechanical strength in 1 month, lime - pozzolana mortars in 3 months while aerial lime mortars continue to gain mechanical strength even in 15 months curing. Furthermore, the use of ceramic aggregates produces lightweight and elastic mortars, compatible to historicones.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 712: Symposium II – Materials Issues in Art and Archaeology VI , 2002 , II2.7
Copyright
Copyright © Materials Research Society 2002

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References

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