Magnesium Oxychloride Cement Composites with MWCNT for the Construction Applications

Abstract

In this contribution, composite materials based on magnesium oxychloride cement (MOC) with multi-walled carbon nanotubes (MWCNTs) used as an additive were prepared and characterized. The prepared composites contained 0.5 and 1 wt.% of MWCNTs, and these samples were compared with the pure MOC Phase 5 reference. The composites were characterized using a broad spectrum of analytical methods to determine the phase and chemical composition, morphology, and thermal behavior. In addition, the basic structural parameters, pore size distribution, mechanical strength, stiffness, and hygrothermal performance of the composites, aged 14 days, were also the subject of investigation. The MWCNT-doped composites showed high compactness, increased mechanical resistance, stiffness, and water resistance, which is crucial for their application in the construction industry and their future use in the design and development of alternative building products.

Properties and Characterization of Magnesium Oxychloride Cement as Carbon Capture Material

“…It is known that MOC, or Sorel Cement, is able to absorb carbon dioxide (CO2) without reducing the quality of the product and has a relatively fast curing time, which makes MOC suitable for quick repairs [6,7]. Even studies reported that its bond with carbon is able to produce an increase in mechanical properties so that it supports the performance of the material in carrying out its functions [8]. MOC can be used in the construction industry as an alternative material for the manufacture of sustainable buildings [9].…”

The Mechanical and Thermal Properties of Cement CAST Mortar/Graphene Oxide Composites Materials

“…Over the last several years, the conventional nanomaterials including carbon-based nanomaterials such as carbon nanotubes (CNTs) (Li & Leung, 1992;Sagar et al, 2012), carbon black (Goracci & Dolado, 2020), carbon nanofibers (CNFs) (Popov, 2004;Roychand et al, 2016), MECNT (Lojka et al, 2021), Graphene Oxide (GO) (De Jong & Geus, 2000;De Volder et al, 2013;Llobet, 2013), and, reduced graphene oxide (rGO) (Geim & Novoselov, 2007;Wang et al, 2021;Zhou et al, 2016) have widely been used as fillers to improve the cement-based properties, including cracking, toughness, tensile strength, and thermal insulator. Less than 0.50 wt.% of the carbon nanomaterials were added to the cement-based materials to produce sustainable composites and to improve the mechanical properties and durability (Marcano et al, 2010;Zhu et al, 2010).…”