56 THE JOURNAL OF THE BUILDING LIMES FORUM L ime as a historical material and techniques in the use of lime have been systematically investigated in different angles of research (in situ, 1,2 in the lab, 3,4 and through market study 5,6 ) for the last twenty years. The author’s interpretation of building limes and their standardisation processes have been previously published. 7–10 In the present article, the reactivities of three characteristic quicklime samples available in the Greek market (high-calcium, air-hardening lime binders, or air limes) are demonstrated and are compared to laboratory-calcined samples from the same limestone quarries. Practical chemical and physical properties are measured, and published mechanical, physical, and structural characteristics of identical mortars (based on previously selected and/or manufactured air limes) are compared with bibliographical results concerning mortars manufactured with natural pozzolan (traditionally ‘standardised’ in Greece) and mortars made of hydraulic lime (historically not produced in Greece). Although the mechanical properties of lime-plus-pozzolan mortars appear quite similar to those of hydraulic lime mortars, their physical Georgia Zacharopoulou graduated as a civil and structural engineer at the Aristotle University of Thessaloniki, Greece, in 1986, and gained a PhD in 2004. After working freelance, she was awarded an MA in Conservation Studies at the University of York in 1993. She has been working for the Greek Ministry of Culture for the last twenty years, developing particular interest in the conservation of modern monuments (structures embedding historical, artistic, and scientific values and built after 1830, the date of the establishment of the modern Greek state). She has specialised in the theory and technology of lime binders, and their proper implementation in the conservation field. She is also concerned with the European standardisation process and its impact on the sustainability of local lime heritage. She is currently an employee of the 9th Ephorate of Byzantine Monuments, Eptapyrgion, Thessaloniki, Greece. Georgia Zacharopoulou Some considerations on the available lime binders in Greece in the context of the Construction Products Regulation