Editorial for the Special Issue “The Rietveld Method in Geomaterials Characterisation”

Kerestedjian, Thomas

doi:10.3390/min11080814

Minerals

2021

DOI: 10.3390/min11080814

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Editorial for the Special Issue “The Rietveld Method in Geomaterials Characterisation”

Thomas Kerestedjian

Abstract: The raw materials obtained from the Earth’s crust (Geomaterials) are of fundamental importance for a wide range of industries [...]

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Optimizing the L/S Ratio in Geopolymers for the Production of Large-Size Elements with 3D Printing Technology

et al. 2022

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Geopolymer concretes can be a viable alternative to conventional Portland cement-based materials. In their design, it is important to maintain an appropriate liquid-to-solid ratio (L/S), which affects several properties, such as the compressive strength, water absorption, and frost resistance. The objective of this paper is to analyze the influence of the fly-ash and metakaolin precursor types for three different L/S ratios: 0.30, 0.35, and 0.45. The results of the physical and mechanical properties, including the apparent density and compressive strength, as well the durability parameters, including frost resistance and water penetration depth, are presented in this paper. It was found that as the L/S ratio decreased, the average compressive strength increased for all materials. After freeze–thaw cycles, decreases in the compressive strength properties were observed for all types of materials—metakaolin- and fly ash-based—irrespective of the L/S ratio. Moreover, the frost resistance of geopolymers increased with the increase in the L/S ratio. The printability of the mixes was also verified in order to confirm the application of the developed materials to additive manufacturing processes.

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Optimizing the L/S Ratio in Geopolymers for the Production of Large-Size Elements with 3D Printing Technology

et al. 2022

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Editorial for the Special Issue “The Rietveld Method in Geomaterials Characterisation”

Abstract: The raw materials obtained from the Earth’s crust (Geomaterials) are of fundamental importance for a wide range of industries [...]

Cited by 1 publication

References 10 publications

Optimizing the L/S Ratio in Geopolymers for the Production of Large-Size Elements with 3D Printing Technology

Optimizing the L/S Ratio in Geopolymers for the Production of Large-Size Elements with 3D Printing Technology

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