Table 1 Comparison of the weight% of elements in the historical brick sample and the purchased brick.

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

Element

Sample

Fe

Ca

K

Cl

Si

Al

Mg

Na

O

Historical Brick

2.88

13.52

1.29

2.69

17.12

6.24

2.27

1.98

52.02

Purchased Brick

2.63

10.29

1.73

0.18

18.25

6.60

2.30

0.76

57.26