| Title |
Magnesium phosphate cement incorporating sheep wool fibre for thermal insulation applications |
| ID_Doc |
13802 |
| Authors |
Maldonado-Alameda, A; Alfocea-Roig, A; Huete-Hernández, S; Giro-Paloma, J; Chimenos, JM; Formosa, J |
| Title |
Magnesium phosphate cement incorporating sheep wool fibre for thermal insulation applications |
| Year |
2023 |
| Published |
|
| DOI |
10.1016/j.jobe.2023.107043 |
| Abstract |
The increasing use of synthetic fibres in clothing and the high quality of sheep wool fibre (SWF) from the Australian and New Zealand market leads to a decline in the interest in SWFs produced in European countries, considering them as waste that could be valorised within the framework of a circular economy. The use of natural fibre in cement-based composites presents the main issue of durability due to the alkaline pH media of conventional cement. The use of a low-pH cement could improve the viability of combining natural fibres in this low-pH cement as matrix for developing composites. One of these low-pH cements is magnesium phosphate cement (MPC). As a ceramic material the MPC presents high thermal conductivity (similar to 1 W m(-1) K-1) to be used as isolating material. The present work combines MPC formulated with an industrial by-product (low-grade magnesium oxide; LG-MgO) and Spanish SWF, to develop new sustainable cementbased materials (Sust-MPC-SWF) for thermal building insulation applications. The physical, thermal, and mechanical properties of Sust-MPC-SWF were evaluated to determine the optimal formulation through a design of experiments (DoE). Thirteen formulations designed by DoE were conducted with different sheep wool fibre/cement (SWF/C) and sheep wool fibre/extra water (SWF/EW) ratios. A statistical model was obtained and the optimal formulation (SWF/C = 0.36 and SWF/EW = 0.25) was validated. The increase in SWF content led to an enhancement of thermal and acoustic insulation properties of Sust-MPC-SWF, with similar results to other building materials commercialized with these features. |
| Author Keywords |
Magnesium phosphate cement; Low-grade magnesium oxide; By-product; Valorisation; Sheep wool fibre; Design of experiments |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001059900200001 |
| WoS Category |
Construction & Building Technology; Engineering, Civil |
| Research Area |
Construction & Building Technology; Engineering |
| PDF |
https://doi.org/10.1016/j.jobe.2023.107043
|