| Title | Circular design, material properties, service life and cradle-to-cradle carbon footprint of lime-based building materials |
|---|---|
| ID_Doc | 22616 |
| Authors | Laveglia, A; Madrid, DV; Ukrainczyk, N; Cnudde, V; De Belie, N; Koenders, E |
| Title | Circular design, material properties, service life and cradle-to-cradle carbon footprint of lime-based building materials |
| Year | 2024 |
| Published | |
| Abstract | The massive extraction of virgin raw materials has substantially intensified the focus on circular economy of building materials. As a Cradle-to-Cradle service life and circular approach for lime-based construction materials (LBCM) is lacking, the present study evaluates the environmental impact and feasibility of creating a fully recycled second-life render (SL) by designing a closed-loop upcycling process for first-life renders (FL). To achieve this, a second-life binder was thermally activated (900, 1000, 1100, 1200 degrees C), while its microstructure, compressive strength, and thermal conductivity were investigated. SL had up to 33 % open porosity (FL 29 %), its compressive strength ranged from 2.5 to 3.4 MPa (FL 4.4 MPa) and the thermal conductivity from 1.002 to 1.107 W/mK (FL 1.231 W/mK). Resistance of SL and FL against sulfate attack was found to be equivalent, measured based on the recent RILEM TC 271-ASC recommendation. The environmental impact indicators integrating material properties and durability confirm that the second life-render can reduce CO2 2 emissions up to 55 %. The present research provides insights into unlocking essential sustainability gains through circular practices in the life-cycle of LBCM. |
| https://doi.org/10.1016/j.scitotenv.2024.174875 |
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