Experimental Study For The Consolidation Of
Stone Of Old Fortifications
Author(s)
M. Stefanidou & I. Papayianni
Abstract
For the construction of fortifications large amounts of stone pieces from nearby
deposits have been used. Serpentines, gneiss, schist, limestones and marbles are
the most commonly found stones.
Most of them present decay which is not only surfacial but goes deeper to the
interior of the stone. The problem is that their replacement is not always easy and
there is a need for cleaning and consolidating them. Since fortifications are
usually exposed to extreme climatic conditions because of their position, the
question is which consolidant will be more effective in protecting the stones.
In this paper the results of a study concerning the characteristics of
serpentines, schist and gneiss are presented. Strength, porosity and pore size
distribution as well as microscopic observations have been measured before and
after the application of commercial consolidants on those stones. The
methodologies followed for the determination of the above mentioned
characteristics are the recommended ones by NORMAL 26/87 (Group M). Based
on the measurements, it seems that ethyl silicate combined with methyl resin is
more effective than the other consolidants used.
Keywords: stones, physical properties, mechanical properties, consolidation,
cleaning.
1 Introduction
There are two ways to approach the problem of conservation of stones. The most
pessimistic one considers that the conservation should be more effective as there
is \“no progress” in the way that stones are cured (C.A. Price, 1996 [1]) and it
seems unavoidable to stop the deterioration (N. Belogiannis, 1987 [2]). On the
other hand there is the option according to which many ‘’steps forward’’ have
Keywords
stones, physical properties, mechanical properties, consolidation,
cleaning.
Related Book
Other papers in this volume
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