Strength enhancement of Eskisehir tuff ashlars in Turkey: Fid-Bau Portal

Strength enhancement of Eskisehir tuff ashlars in Turkey

Emir, Ercan / Konuk, Adnan / Daloğlu, Gülnaz

Highlights ► Tuff is porous rock and it is considerably poor in strength. ► The enhancement of strength properties of tuff blocks by slaked lime diffusion. ► This method proved successful in ensuring a 100% increase in UCS. ► Tuff samples should be kept in lime-water for up to a maximum 1 day. ► Leaving them for air-drying for 7 days would be appropriate.

Abstract Tuff has always been a type of material used as natural building stone in building sector since early times. The reason for such a common use despite its low strength properties and high porosity is the fact that tuff is lightweight, easy to process and has good isolation properties. Another practical area for tuff in building sector is its use in cement production as pozzolan. Making use of tuffs’ high porosity and of cement production process, what is aimed in this study is enhancement of strength properties of white tuff blocks in the Eskisehir–Derbent Ciftligi region by means of treatment in slaked lime bath. Half of the tuff samples were kept in slaked lime bath for 1day and the other half were kept for 1week and then they were subjected to uniaxial compression tests (UCS). The tests were conducted on the sample groups kept for 7days and 28days under atmospheric conditions like those of concrete tests. Analysis of variance among the test results showed that it was appropriate to keep tuff blocks in lime-water for a maximum of 1day and to air-dry them for 7days. This method proved successful in ensuring a 100% increase in UCS of the white tuffs in the Eskisehir-Derbent Ciftligi region.