Table 6 Results of porosity percentages after Spraying.

From: Application of nano-pico geotechnics and nano-pico heritage spray techniques for restoring and protecting historical brick buildings

Sample No. (i)

N(g)

\(\:{\varvec{\alpha\:}}_{\varvec{i}}^{\mathbf{{\prime\:}}}\)

V(ml)

\(\:{\varvec{W}}_{2}^{\mathbf{{\prime\:}}}\varvec{i}\)

\(\:{\varvec{W}}_{1}^{\mathbf{{\prime\:}}}\varvec{i}\)

\(\:{\varvec{W}}_{0}^{\mathbf{{\prime\:}}}\varvec{i}\)

1

10

32

300

664.0

568.2

571.81

2

10

30

300

709.2

619.0

624.1

3

10

28.6

300

663.2

577.3

582.1

4

8

31

300

680.0

584.4

588.4

5

8

32

300

672.2

576.2

580.5

  1. *Note: Samples 6, 7 and 8 in the table above were removed due to the low nano content of 8 grams and incomplete coverage of the brick surface. W₀’ (g): Initial dry weight of the sprayed brick sample (grams), W₁’ (g): Weight after partial water saturation (grams), W₂’ (g): Weight after full water saturation (grams), V (ml): Sample volume (milliliters), αi’ (%): Porosity percentage measured post-spraying, N (g): Mass of nanoclay applied to the sample (grams), Sample No. (i): Identifies individual test samples.
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