Biomicrite is one of the most common types of limestone used in archaeological architecture, such as the Cairo Citadel Aqueduct, and it is organic carbonate sedimentary rock, as microfossils and metabolic residues of extinct animals are filled with fine-grained calcite and/or dolomite are scattered in the very fine-grained matrix (micrite), which makes it a relatively weak sedimentary stone, and its preservation is a difficult challenge facing conservators, so they resort to using compatible consolidate materials with limestone components. Nanocomposites are a recent trend in the treatment and conservation of monuments, as they aim to perform a number of functions at the same time, with minimal external chemicals interference.
This experimental study aims to evaluate the efficiency of a number of multifunctional nanocomposites, namely nano zinc titanate added to nano barium hydroxide or nano barium titanate or nano barium oxide mixed in paraloid B-72 dissolved in high purity acetone, by examining the consolidate stones samples using stero microscope, PM, SEM, XRD and water contact angle, in addition to measuring the mechanical properties and colorimetric measurement, it was found that nano zinc titrate added to nano barium oxide mixed with paraloid B-72 dissolved in high pure acetone gave the best results.