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Tangential method

Basically it is only possible to determine a wall thickness change in penetration direction from a density variation of a radiographic film. No absolute wall thickness values can be obtained in this way contrary to the tangential method. [Pg.562]

Tangential method for finding optimum time for maximum amount of heat transfer in evaporator with scale formation. [Pg.358]

Figure 5.15 Amount of portlandite measured by TGA (filled circles tangential method) and as free lime (empty circles measured according to Franke [1941]) CH dry = CH wet normalised to dry weight (diamonds), i.e. to the weight at 6S0°C. The relative measurement error of 5% to 10% is indicated by the dotted lines. (Data from Lothenbach, B., and F. Winnefeld, Cement and Concrete Research, 36(2), 209-226, 2006.)... Figure 5.15 Amount of portlandite measured by TGA (filled circles tangential method) and as free lime (empty circles measured according to Franke [1941]) CH dry = CH wet normalised to dry weight (diamonds), i.e. to the weight at 6S0°C. The relative measurement error of 5% to 10% is indicated by the dotted lines. (Data from Lothenbach, B., and F. Winnefeld, Cement and Concrete Research, 36(2), 209-226, 2006.)...
In literature, generally either the so-called stepwise or the tangential method is used to quantify portlandite. Figure 5.16 shows the effect of the stepwise and tangential methods on the quantification of portlandite in a... [Pg.198]

The tangential method assumes that the weight change due to the presence of C-S-H or other hydrates observed before and after the peak will continue (linearly) in the portlandite region. Such a correction results in the quantification of the portlandite weight loss only and is equivalent to... [Pg.199]

Figure 5.17 Amount of portlandite determined in a hydrated cement (blend of 50 wt.% Portland cement, 20% slag, 25% fly ash and 5% limestone [Scholer et al. 2015] hydrated for 196 days) and in the hydrated cement after the addition of 14 wt.% of portlandite tangential method (5.5 + 14 wt.%) and stepwise method (6.3 + 16.6 wt.%). Figure 5.17 Amount of portlandite determined in a hydrated cement (blend of 50 wt.% Portland cement, 20% slag, 25% fly ash and 5% limestone [Scholer et al. 2015] hydrated for 196 days) and in the hydrated cement after the addition of 14 wt.% of portlandite tangential method (5.5 + 14 wt.%) and stepwise method (6.3 + 16.6 wt.%).
For the quantification of portlandite the tangential method is suggested, as discussed in Section 5.4. [Pg.207]

Tangential method is to directly take the tangent at the contact point after digitization of the drop profile. This method is a curve-fitting method and may have large errors due to disturbance in the drop shape caused by dust particles or contaminants or surface irregularities. [Pg.17]


See other pages where Tangential method is mentioned: [Pg.731]    [Pg.1083]    [Pg.358]    [Pg.358]    [Pg.909]    [Pg.54]    [Pg.162]    [Pg.268]    [Pg.159]    [Pg.161]    [Pg.162]    [Pg.200]    [Pg.200]    [Pg.16]    [Pg.25]   
See also in sourсe #XX -- [ Pg.17 , Pg.25 ]




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