Improved microstructure and free efflorescence geopolymer binders

Djangang, Chantale Njiomou; Mbey, Jean Aimé; Ekani, Cyprien Joel; Tiam, Severin Tabou; Blanchart, Philippe; Njopwouo, D.

doi:10.1007/s42452-020-03959-6

Cited by 3 publications

(3 citation statements)

References 33 publications

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“…Nonetheless, the recorded spectrum is not typical of the referenced compound [45,46] talc spectrum [47,48]. The most intensive band with a peak at 1004 cm −1 , similar to the peak at 666 cm −1 , originates from the Si-O stretching vibrations, whereas the band at 3675 cm −1 originates from stretching of O-H surrounded by the MgMgMg triplet [49,50]. The spectra recorded for the non-weathered coating and coatings weathered in natural conditions (N20 and N24) and artificially weathered, in the salt spray atmosphere (NSS720) and according to the original cyclic test (C3) (Figure 13), did not reveal significant differences between samples of different states.…”

Section: Ftirmentioning

confidence: 93%

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Artificial Weathering Test Methods of Waterborne Acrylic Coatings for Steel Structure Corrosion Protection

Ładosz,

Sudoł,

Kozikowska

et al. 2024

Materials

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Corrosion protection technologies based on waterborne paints have become increasingly popular as steel structure protection, which implies the need to determine relevant assessment methods considering the conditions of use and product-specific characteristics. This study attempts to evaluate the fitness of standard corrosion protection weathering methods and an original cyclic test for verifying the resistance of waterborne acrylic coatings to environmental conditions. Changes to the properties of artificially weathered coatings were analysed with reference to those observed during exposure in natural conditions. The degree of coating degradation after exposure to neutral salt spray and condensation humidity was determined to significantly exceed the changes observed in natural conditions. An original cyclic test caused changes in the appearance, microstructure, FT-IR spectrum and utility properties of the coatings, such as thickness, colour, hardness, adhesion and impedance, similar to those observed in the natural environment. The results confirm that the programming direction of waterborne coatings artificial weathering tests is adequate and promising.

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Section: Ftirmentioning

confidence: 93%

“…17, x FOR PEER REVIEW 16 of 24the Si-O stretching vibrations, whereas the band at 3675 cm −1 originates from stretching of O-H surrounded by the MgMgMg triplet[49,50].…”

mentioning

confidence: 99%

Artificial Weathering Test Methods of Waterborne Acrylic Coatings for Steel Structure Corrosion Protection

Ładosz,

Sudoł,

Kozikowska

et al. 2024

Materials

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show abstract

“…As previously mentioned, during its thermal treatment around 700˚C, muscovite promotes the formation of a less viscous flux with increasing calcination temperature and its content [22]. Moreover, it is argued that excessively high values of these parameters promote interactions with the external environment, and for structural-type applications where impermeability is required, it is desirable to have low permeability [23]. This means that low porosity and subsequent low absorption rate lead to appreciable performances.…”

Section: Physicomechanical Properties Of Geopolymer Bindersmentioning

confidence: 99%

Formulation of Geopolymer Cements from Two Clays Containing Kaolinite and Muscovite: Effect of Temperature on the Physicomechanical Properties of the Products

Balde,

Sidibe,

Bakam

et al. 2023

MSCE

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The paper talks about the elaboration of geopolymer with two types of kaolinite clays containing muscovite. The kaolinite materials were first calcined at different temperatures, and mixed with an activator solution, called liquid precursor, at a different solid/liquid mass ratio depending on their normal consistency to produce geopolymer binders. Results show that the geopolymer products obtained from the different clays have good physichomechanical properties: their open porosity and their water absorption rate decrease while their compressive strength and their apparent density increase with the increase in calcination temperature of the clays. The density of GABD binders varies between 2.92 and 2.47 g/cm 3 and that of GARD binders between 1.86 and 2.16 g/cm 3 . Specimens in the GABD series have the best mechanical performance, ranging from 14.43 to 31.37 MPa, while those in the GARD series oscillate between 6.18 and 11.56 MPa. These properties make kaolinite materials from this region suitable for use as construction materials for adequate waterproof structures.

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High temperature behavior of sodium and potassium volcanic ashes-based alkali-activated materials (Mt. Etna, Italy)

Scanferla,

Finocchiaro,

Gharzouni

et al. 2023

Construction and Building Materials

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Improved microstructure and free efflorescence geopolymer binders

Cited by 3 publications

References 33 publications

Artificial Weathering Test Methods of Waterborne Acrylic Coatings for Steel Structure Corrosion Protection

Artificial Weathering Test Methods of Waterborne Acrylic Coatings for Steel Structure Corrosion Protection

Formulation of Geopolymer Cements from Two Clays Containing Kaolinite and Muscovite: Effect of Temperature on the Physicomechanical Properties of the Products

High temperature behavior of sodium and potassium volcanic ashes-based alkali-activated materials (Mt. Etna, Italy)

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