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Environmental Earth Sciences

, Volume 70, Issue 4, pp 1605–1618 | Cite as

Assessment of the physico-mechanical behaviour of gypsum-lime repair mortars as a function of curing time

  • Jesús Igea RomeraEmail author
  • Sagrario Martínez-Ramírez
  • Pilar Lapuente
  • María Teresa Blanco-Varela
Original Article

Abstract

Gypsum-based mortars were widely used during the Mudejar artistic period in Spain from the 12th to 16th century. During restoration works, compatibility between the new repair mortars and the original components is essential for an adequate intervention on the monument. The increasing interest of knowing the properties of the gypsum-lime-based mortars for restoration purposes justifies the research carried out. Different mortars compatible with traditional building materials were elaborated by varying the binder proportions, the type of aggregates, the binder/aggregate ratios and the curing time. The main goal of this paper is to characterize the mechanical behaviour and the pore structure of the mortars as a function of curing time. The influence between the different variables used to prepare the mortars and the development of the carbonation process over time is also considered. Mechanical strength and porosity measurements as well as X-ray diffraction and thermal analysis were performed after curing times of 1, 28 and 90 days. The results obtained confirmed a progressive increase in mechanical strength linked to the carbonation of the mortars prepared. Less lime binder and also aggregate contents showed the highest rise in strength over time, related to the highest initial porosity which favoured the carbon dioxide flow. The use of siliceous aggregates (GL-QS mortars) obtained the best results in the development of physico-mechanical properties over curing time. The knowledge obtained from the studied mortars provides practical information to establish a suitable mortar mixture for restoration works on historic buildings and modern architecture where gypsum-lime-based mortars are used.

Keywords

Gypsum-lime mortars Restoration Curing Carbonation Mechanical properties Porosity 

Notes

Acknowledgments

The present study was supported by Departamento de Patrimonio del Gobierno deAragón and Europe Programme from Caja de Ahorros de la Inmaculada (CAI). We are also grateful to Esyedebro and Calcinor for the material supplied.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Jesús Igea Romera
    • 1
    Email author
  • Sagrario Martínez-Ramírez
    • 2
    • 3
  • Pilar Lapuente
    • 1
  • María Teresa Blanco-Varela
    • 3
  1. 1.Departamento de Ciencias de la TierraUniversidad de ZaragozaZaragoza (España)Spain
  2. 2.Instituto de Estructura de la Materia IEM-CSICMadrid (España)Spain
  3. 3.Instituto Eduardo Torroja-CSICMadrid (España)Spain

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