A review of mechanical properties and carbonation behavior evolution of lime mortar for architectural heritages restoration

Abstract

Using lime mortar to connect, protect and decorate buildings was a very common technique in ancient times. Understanding the mechanical properties and carbonation mechanism of lime mortar is the basis for successful restoration and protection of architectural heritage. The compatibility and durability of lime mortar and architectural heritage promote the study of related mechanisms, so that it can adapt to the current reality. In this paper, the factors affecting the mechanical properties of lime mortar are summarized, and the carbonization principle of lime mortar is analyzed. The effects of water-binder ratio, aggregate mineralogy and particle size, inorganic additives and organic additives on the mechanical properties of lime mortar were elaborated in detail, especially the action behavior of organic additives in the carbonation process of lime mortar. Suggestions for enhancing the mechanical properties of lime mortar are put forward, which provides a theoretical basis for improving the compatibility and durability of materials in the restoration of ancient buildings.