Aladin applet. Further probing adsorbates are also utilized, albeit with lower frequency, allowing the measurement of surface area at different temperatures and measurement scales. Assuming an Arrhenius law for desorption, the related constants can be expressed as. Identifier query.
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See description. The rate of curing of concrete depends on the fineness of the cement and of the components used in its manufacture, which may include fly ash , silica fume and other materials, in addition to the calcinated limestone which causes it to harden. Bibcode : JAChS.. SAO
1. Gaia DR2
2. When hydrated cement hardens, the calcium silicate hydrate or C-S-H , which is responsible for the hardening reaction, has a large specific surface area because of its high porosity.
Bibcode : JAChS.. Chapters 3, 4 and 5. TYC
GC YZ 14 Namespaces Article Talk. Although the Blaine air permeability method is often preferred, due to its simplicity and low cost, the nitrogen BET method is also used.
Measurement of the specific surface area using the BET method is useful for comparing different cements. HR It is still not clear on how to find the linear range of the BET plot for microporous materials in a way that reduces any subjectivity in the assessment of the monolayer capacity. Even this restriction has to be modified depending upon conditions.
GSC This plot is called a BET plot.
The BET theory can be derived similarly to the Langmuir theory , but by considering multilayered gas molecule adsorption, where it is not required for a layer to be completed before an upper layer formation starts. GCRV It is currently limited to a maximum of 30 arcsec.
The following equations can be used:. TD1 Please, have a look at Best practices. It is still not clear on how to find the linear range of the BET plot for microporous materials in a way that reduces any subjectivity in the assessment of the monolayer capacity.
For this reason, standard BET analysis is most often conducted at the boiling temperature of N 2 77 K. Please, have a look at Best practices. It is currently limited to a maximum of 30 arcsec.
WEB The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
HR Even this restriction has to be modified depending upon conditions. UBV
Different methods of measuring cement paste surface areas often give very different values, but for a single method the results are still useful for comparing different cements. UBV UBV M