Introduction to Hydraulic Lime Mortars
Lime mortars have been used historically in building construction due to their unique properties. This document explores the nature of lime, its manufacturing process, and its application in modern construction.

What is Lime?
Lime is a material derived from limestone (CaCO3) through a process of calcination, where heat is applied to produce quicklime (CaO) and carbon dioxide (CO2). When water is added, it forms slaked lime (Ca(OH)2), which can reabsorb CO2 to revert to its original limestone form. This cycle allows for the reabsorption of CO2 emitted during calcination, although CO2 from fuel combustion is not reabsorbed.

Lime vs. Cement Properties
Lime and cement have distinct properties:

• Lime: Soft, permeable, and flexible.
• Cement: Hard, impervious, and rigid.

Lime's flexibility and permeability make it a sustainable choice, allowing for the reuse of bricks, unlike hard cement mortars.

Lime Works and Modern Application
Lime is being integrated into modern construction through innovative methods such as silo delivery, which reduces site waste and enhances security. Lime mortars are used in various projects, including private homes, offices, and educational institutions.

Benefits of Lime

• Reduces the need for expansion joints.
• Consumes less energy in production compared to cement.
• Reabsorbs CO2 during curing and setting.
• Facilitates masonry recycling at the end of its life.
• Provides a breathable construction form.
• Enhances the aesthetic appeal of masonry.