Properties of Lime Binder and Fine Aggregates Used in Roman Mortars

Project No2016İYTE52
Supported by
Project DirectorProf.Dr. Hasan BÖKE
Res.Assist. Burcu TAŞCI
Project Budget3500 TL
Project Term05.12.2016 – 05.12.2017

Roman period structures found in archaeological sites in Anatolia are documents showing the construction technologies of that period. Therefore, it is important to conserve and hand them down to future generations. Lime mortars are the most important binding material used in the construction of Roman structures. Lime mortars are obtained by mixing sand and lime as aggregate. It is also known that pozzolonic aggregates are commonly added to the mixture to increase the properties of these mortars and plasters. Pozzolonic aggregates mixed with lime make the mortars hydraulic. Hydraulic mortars and plasters have the ability to harden under water as a result of the reaction of lime with pozzolans to form calcium silicate hydrates. In this study, the pozzolonic properties of the limes used in the mortars and sand used as fine aggregates in some Roman structures, which are commonly found in the Aegean and Mediterranean regions of Anatolia, will be determined. The mortars to be studied will be taken from some Roman structures in the Aegean and Mediterranean regions. Fine aggregates in mortars will be obtained by dissolving and seperating carbonized lime in hydrochloric acid. Aggregates with particle sizes between 125-53 microns will be used in the experiments. Lime, on the other hand, will be obtained by mechanically removing the carbonated lime in the form of white lumps from the mortars. Their mineralogical and chemical compositions will be determined using XRD, IR and SEM-EDS.

As a result of the study, the common features or differences of the lime and fine aggregates used in the Roman period mortars in different areas will be determined and the reasons for these will be revealed. This information will be necessary both in terms of documenting the properties of the mortars used in the Roman period buildings and in knowing the properties of the new mortar materials to be used in the repair of these structures.