Development of pozzolanic lime mortars for the repaiır of historic masonry

Güney, Bilge Alp
The use of lime mortars with pozzolanic additives is of special importance for the repair of historic masonry. In this study, the effect of pozzolanic materials on the final characteristics of mortars was investigated. Metakaolin, fly ash and historic brick powder were used as pozzolanic materials in mortar mixes with varying binder:pozzolan:aggregate ratios. Historic mortar samples from rubble stone masonry of Kahta Castle, a medieval structure in close vicinity of the Nemrut Dağ Monument, were also investigated to serve as a starting point for the preparation of repair mortars. Physical and physicomechanical tests, optical microscopy, chemical tests, SEM-EDX and XRD analyses were used to assess the properties of the historic mortars and repair mortars. Fat lime was found to be used in historic mortars with a high binder/aggregate ratio. They were observed to have relatively low density and high porosity with an average compressive strength of 7.4 MPa. Historic mortars were determined to have relatively high water vapour permeability and low water impermeability characteristics. In repair mortars setting was found to be predominantly due to carbonation along with pozzolanic reactions. However, abundant presence of stratlingite in mortars with added metakaolin indicated that the pozzolanic reactions preceded carbonation in those mortars. Use of pozzolanic materials increased the uniaxial compressive strength and modulus of elasticity of mortars compared with control samples. Using the same binder:pozzolan:aggregate ratio, highest increase was observed on mortars prepared with added fly ash at the end of 90 days. Durability parameters of repair mortars defined as wet to dry compressive strength were in the very good to excellent range according to Winkler’s classification. By using fly ash, design of lime mortars with high water impermeability and high water vapour permeability characteristics was accomplished.


An Informed process for new building design in historic settlement: the case of İbrahimpaşa Village, Cappadocia-Turkey
Binoğul, Beril; Özgönül, Nimet; Conservation of Cultural Heritage in Department of Architecture (2019)
Historical settlements are heritage sites which are formed in time, in accordance with the landform, climate, local materials and traditional living styles which all together specify the original characteristics of that area. They should be able to change and develop according to the needs, while they also maintain the continuity of their original characteristics. In this concept, new buildings in historical settlements is a conservation problem and solutions should be provided to maintain the values of the...
Biological mortar application for micro-crack remediation in stones of travertine monuments
Sırt Çıplak, Elif; Şahin Güçhan, Neriman; Bilecen, Kıvanç; Conservation of Cultural Heritage in Department of Architecture (2018)
Traditional conservation methods for the preservation of historical stones including applications with inorganic and organic polymers are often inadequate and results in introduction of new deterioration problems to historic structures. At this point, consolidating a stone by re-creating a structure similar to original microstructure of stone is a new approach developed to ensure the maximum compatibility by comparison to the traditional conservation techniques. In this study it was aimed to develop a susta...
A Study for the conservation of Ertem olive-oil factory in Ayvalık /
Yıldız, Gözde; Şahin Güçhan, Neriman; Conservation of Cultural Heritage in Department of Architecture (2017)
Conservation and re-adaptation of industrial heritage has been a quite important aspect in the sense of continuity of the historic industrial character of the place for future generations. Industrial buildings usually lost their functions due to the fast technological developments and changing within production/consumption systems. This inevitable functional loss caused the obsolete structures which are regarded as industrial heritage. It is essential to conserve and recover the post-industrial landscapes t...
Upgrading the old: the adaptation of traditional residential buildings to the contemporary life
Avcı, Deniz; Bilgin Altınöz, Ayşe Güliz; Restoration in Department of Architecture (2012)
Traditional residential buildings constitute an important part of Turkey’s cultural heritage. However, in most of the cases, these buildings face with the problems of arbitrary alterations disregarding their values, abandonment, neglect and even demolition. To prevent these problems, they need to be 'upgraded' to the contemporary life, while sustaining their values and cultural significance. During this 'upgrading' process, the most common and important problems are faced with during the re-functioning of t...
Evaluation of seismic resistance of traditional Ottoman timber frame houses
Aktaş, Yasemin Didem; Şahin Güçhan, Neriman; Türer, Ahmet; Department of Architecture (2011)
The aim of this study is to evaluate the seismic resistance of traditional Ottoman timber frame “hımış” structures, which form the major part of Turkey’s cultural heritage, from an engineering point of view. On the other hand, the seismic resistance of traditional Ottoman timber frame structures was not evaluated from an engineering perspective. For the aim of seismic resistance evaluation of traditional Ottoman timber frame houses, the TUBITAK (the Scientific and Technological Research Council of Turkey) p...
Citation Formats
B. A. Güney, “Development of pozzolanic lime mortars for the repaiır of historic masonry,” Ph.D. - Doctoral Program, Middle East Technical University, 2012.