Comparison of different techniques to study the nanostructure and the microstructure of cementitious materials with and without superabsorbent polymers

D. Snoeck (Corresponding author), Leo Pel, N. De Belie

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

Uittreksel

It is difficult to study the microstructural porosity in time without destroying the samples and stopping hydration. Current techniques mainly involve mercury intrusion porosimetry and microscopic analysis. These destructive techniques are able to give information on the microstructure, but the nanostructure is affected due to sample preparation. Dynamic vapour sorption is a technique which is not often used to study the nanostructure of cementitious materials and requires the application of different models. Furthermore, nuclear magnetic resonance can be applied to non-destructive study not only the total water content but also the pore size distribution by comparing the T2 relaxation times, and can be combined with cryoporometry. In this paper, these different measuring techniques are compared and linked to each other. The obtained nano- and microstructures are compared to different models found in literature. Pore sizes in the range of 1.5–2 nm and of 8–12 nm are found, reflecting the gel pores. In addition, some bigger capillary pores are found. The measuring techniques are complementary to each other as they study different pore size ranges and are based on different phenomena.

TaalEngels
Pagina's244-253
Aantal pagina's10
TijdschriftConstruction and Building Materials
Volume223
DOI's
StatusGepubliceerd - 30 okt 2019

Vingerafdruk

Pore size
Nanostructures
Polymers
Microstructure
Mercury
Hydration
Relaxation time
Water content
Sorption
Gels
Porosity
Vapors
Nuclear magnetic resonance

Trefwoorden

    Citeer dit

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    title = "Comparison of different techniques to study the nanostructure and the microstructure of cementitious materials with and without superabsorbent polymers",
    abstract = "It is difficult to study the microstructural porosity in time without destroying the samples and stopping hydration. Current techniques mainly involve mercury intrusion porosimetry and microscopic analysis. These destructive techniques are able to give information on the microstructure, but the nanostructure is affected due to sample preparation. Dynamic vapour sorption is a technique which is not often used to study the nanostructure of cementitious materials and requires the application of different models. Furthermore, nuclear magnetic resonance can be applied to non-destructive study not only the total water content but also the pore size distribution by comparing the T2 relaxation times, and can be combined with cryoporometry. In this paper, these different measuring techniques are compared and linked to each other. The obtained nano- and microstructures are compared to different models found in literature. Pore sizes in the range of 1.5–2 nm and of 8–12 nm are found, reflecting the gel pores. In addition, some bigger capillary pores are found. The measuring techniques are complementary to each other as they study different pore size ranges and are based on different phenomena.",
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    Comparison of different techniques to study the nanostructure and the microstructure of cementitious materials with and without superabsorbent polymers. / Snoeck, D. (Corresponding author); Pel, Leo; De Belie, N.

    In: Construction and Building Materials, Vol. 223, 30.10.2019, blz. 244-253.

    Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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