In the field of construction and civil engineering, lime products are extensively used as a filler and bonding agents in building materials. Lime-based mortars have been used in the masonry construction as joint (mortars) in between bricks and blocks. In these mortars, hydrated lime (HL) is usually mixed with cement and/or other hydraulic materials to improve their mechanical properties. However, in theory, pure-lime mortars offer the advantage of sequestrating during its service life, around 60% of the CO2 emission generated during the HL manufacturing. This process is known as “lime cycle” and opens a door to explore the full recyclability of this material at the end of life. In this lecture the practical feasibility of the lime cycle applied to mortars is discussed, the physic-chemical quality of the “renewed” mortar at the end of the recycling cycle are experimentally addressed (XRD, DTA/TG, Isothermal Calorimetry, FTIR and Compressive Strength techniques) and the environmental impact of the Cradle-to-Grave vs the Cradle-to-Cradle solution is quantified through rigorous and reproducible Life Cycle Assessment methodology.