GRAPHENE- AND GRAPHITE OXIDE-REINFORCED MAGNESIUM OXYCHLORIDE CEMENT COMPOSITES FOR THE CONSTRUCTION USE

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.

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Effects of an Inorganic Additive on the Interfacial Properties of Glass-Fiber / Magnesium-Oxychloride Cement Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.249.363 ◽

2003 ◽

Vol 249 ◽

pp. 363-366 ◽

Cited By ~ 1

Author(s):

Y.D. Zhu ◽

Jing He Wang ◽

Rui Weng ◽

X.M. Li

Keyword(s):

Glass Fiber ◽

Interfacial Properties ◽

Cement Composites ◽

Magnesium Oxychloride ◽

Magnesium Oxychloride Cement ◽

Oxychloride Cement

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Effect of EVA Emulsion on the Properties of Corn Stalk Magnesium Oxychloride Cement Composites

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.863.71 ◽

2017 ◽

Vol 863 ◽

pp. 71-77

Author(s):

Si Qi Li ◽

Ying Liang Tian ◽

Chang Wei Xu ◽

Jian Heng Wang ◽

Shi Bing Sun ◽

...

Keyword(s):

Mechanical Properties ◽

Thermal Conductivity ◽

Water Absorption ◽

Water Resistance ◽

Cement Composites ◽

Corn Stalk ◽

Coefficient Of Thermal Conductivity ◽

Magnesium Oxychloride ◽

Magnesium Oxychloride Cement ◽

Oxychloride Cement

By the method of EVA emulsion coating, cron stalk-magnesium oxychloride cement composites (C-MOC) was modified to study the effect of EVA emulsion content on C-MOC density, the coefficient of thermal conductivity, water resistance and mechanical properties. Furthermore microstructure of C-MOC was analyzed by SEM. The results show that: with the increase of EVA emulsion content, the coefficient of thermal conductivity and softening of C-MOC increase, but water absorption reduces. When the content is 80%, the flexural strength after 28 days could reach 3.65 MPa and the compressive strength is 4.69 MPa, reaching the maximum. At the same time, C-MOC density is 816 kg/m3 and thermal conductivity is 0.111 W/(m·k). Water absorption is 36% and softening coefficient was 0.47. It is believed that EVA emulsion could form a thin film on the outer surface of the corn stalk by microscopic analysis, increasing the roughness of the straw surface and reducing the gap between the stalk. Since the EVA emulsion has good compatibility with the magnesium oxychloride cement, they could constitute a whole jointly with glue liquid, crystal and fiber, playing the role of enhancing the surface. Therefore, water resistance, thermal conductivity and mechanical properties of C-MOC have been improved effectively.

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