RİLEM LHS Workshop I Lime Based Materials for Repairing Historic Structures , Thessaloniki, Greece, 3 - 04 February 2022, pp.1-10
Valorization of the abundant and readily accessible waste rock-cut
carving earth of Cappadocia as a precursor through alkali-activated mortars is
aimed in this study to be used on historical structures. Numerous mortar mixes
were designed with different substitutions of Cappadocia natural pozzolan (CNP),
which is a kind of natural pozzolan, slaked lime (CH), and natural hydraulic lime
(NHL). Two different alkali activators were used to determine their effects on
compressive strength. A superplasticizer was used to enhance workability. A mini-
slump test was performed to determine the workability of the mixes. In addition,
mechanical, physical, and durability properties such as compressive strength, open
and real density, water absorption coefficient by capillarity, and freeze-thaw
resistance were designated. After evaluating test results, the selected mortar was
used to fill the cracks on the damaged wall of masonry and rock-cut historical
structures to check its on-site performance. It was inferred that alkali-activated
CNP (AACNP) with a certain CH-substitution displayed the best mechanical,
physical, and durability performance. Test results and on-site observations
demonstrated that AACNP could be used as an alternative mortar and might be an
appropriate repair mortar for conserving historical buildings, considering its
properties.