Hydration of Reactive MgO as Partial Cement Replacement and Its Influence on the Macroperformance of Cementitious Mortars
Autor: | José María Fernández, Rui V. Silva, T. Gonçalves, J. de Brito, Álvaro Romero Esquinas |
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Rok vydání: | 2019 |
Předmět: |
Cement
Thermogravimetric analysis Materials science Article Subject Carbonation 0211 other engineering and technologies General Engineering 02 engineering and technology 021001 nanoscience & nanotechnology Compressive strength Flexural strength Differential thermal analysis 021105 building & construction lcsh:TA401-492 lcsh:Materials of engineering and construction. Mechanics of materials General Materials Science Cementitious Composite material 0210 nano-technology Shrinkage |
Zdroj: | Advances in Materials Science and Engineering, Vol 2019 (2019) |
ISSN: | 1687-8442 1687-8434 |
Popis: | A recent quest for more sustainable cement-based construction materials has triggered the pursuit of technically viable alternatives of cement, making reactive magnesium oxide (MgO) one of the least known top contenders to reduce this sector’s environmental impact since it participates in the cement’s hydration reactions and presents enhanced carbon capture ability during its life cycle. In this study, two different commercially available reactive MgO samples were evaluated as partial cement replacements (at 10%, 15%, and 20%, by weight) in the production of mortars. Thermogravimetric analysis (TGA), energy-dispersive X-ray (EDX) analysis, differential thermal analysis (DTA), and powder X-ray diffraction (XRD) analysis of cement, MgO samples, and resulting mortars were carried out. All specimens were evaluated in terms of their mechanical and durability-related performance (i.e., flexural and compressive strength, carbonation, water absorption by capillary action, and shrinkage). The main results suggest that, in spite of the decreased, albeit acceptable, performance with increasing incorporation of MgO as partial cement replacement, a significant decrease was observed in the shrinkage strain of cementitious materials. |
Databáze: | OpenAIRE |
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