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Title: | Fabrication of sustainable magnesium phosphate cement micromortar using design of experiments statistical modelling: Valorization of ceramic-stone-porcelain containing waste as filler |
Author: | Huete Hernández, Sergio Maldonado Alameda, Alex Giró Paloma, Jessica Chimenos Ribera, Josep Ma. Formosa Mitjans, Joan |
Keywords: | Propietats mecàniques Ciment pòrtland Disseny d'experiments Mechanical properties Portland cement Experimental design |
Issue Date: | 21-Dec-2020 |
Publisher: | Elsevier B.V. |
Abstract: | Magnesium phosphate cement (MPC) is a potential sustainable alternative to Portland cement. It is possible to lower the total CO2 emissions related to MPC manufacturing by using by-products and wastes as raw materials. When by-products are used to develop MPC, the resultant binder can be referred to as sustainable magnesium phosphate cement (sust-MPC). This research incorporates ceramic, stone, and porcelain waste (CSP) as a filler in sust-MPC to obtain a micromortar. Sust-MPC is formulated with KH2PO4 and low-grade MgO (LG-MgO), a by-product composed of 40-60 wt% MgO. CSP is the non-recyclable glass fraction generated by the glass recycling industry. The effect of water and CSP addition on the mechanical properties of sust-MPC was analyzed using design of experiments (DoE). A statistical model was obtained and validated by testing ideally formulated samples achieved through optimization of the DoE. The optimal formulation (15 wt% of CSP and a water to cement ratio of 0.34) was realized by maximizing the compressive strength at 7 and 28 days of curing, resulting in values of 18 and 25 MPa respectively. After one year of curing, the micromortar was physico-chemically characterized in-depth using backscattered scanning electron microscopy (BSEM-EDS) and Fourier transform infrared-attenuated total reflectance spectroscopy (FTIR-ATR). The optimal formulation showed good integration of CSP particles in the ceramic matrix. Thus, a potential reaction between silica and the K-struvite matrix may have occurred after one year of curing. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1016/j.ceramint.2020.12.210 |
It is part of: | Ceramics International, 2020, vol. 47, num. 8, p. 10905-10917 |
URI: | http://hdl.handle.net/2445/178715 |
Related resource: | https://doi.org/10.1016/j.ceramint.2020.12.210 |
ISSN: | 0272-8842 |
Appears in Collections: | Articles publicats en revistes (Ciència dels Materials i Química Física) |
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