| 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 |
|
| DOI |
10.1016/j.scitotenv.2024.174875 |
| 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. |
| Author Keywords |
Cradle-to-cradle; Circular economy; Lime-based materials; X-ray computed micro-tomography; Porosity; Compressive strength; Sodium sulfate attack; Carbon reduction |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001275788700001 |
| WoS Category |
Environmental Sciences |
| Research Area |
Environmental Sciences & Ecology |
| PDF |
https://doi.org/10.1016/j.scitotenv.2024.174875
|