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Table 3 Physical and mechanical properties of sandstone and limestone samples treated with the functionalized silicone (S) and acrylic (AC) polymers

From: Antimicrobial potential of consolidation polymers loaded with biological copper nanoparticles

Physical and mechanical properties

Sandstone

Limestone

Untreated stones

AC/CuNPs

S/CuNPs

Untreated stones

AC/CuNPs

S/CuNPs

Bulk Density (g/cm3)

1.6 ± 0.3

1.9 ± 0.4*

1.8 ± 0.2

1.9 ± 0.3*

2.2 ± 0.2**

2.1 ± 0.3*

Water Absorption (%)

19.8 ± 1.9

14.3 ± 1.7*

3.6 ± 0.4**

8.4 ± 1.1**

6.4 ± 0.5**

2.3 ± 0.2**

Porosity (%)

26.3 ± 2.5

18.7 ± 2.2*

4.3 ± 0.3**

15.6 ± 1.5*

9.7 ± 0.8**

4.4 ± 0.4**

Compressive strength (MPa)

19.8 ± 1.6

28.3 ± 1.9**

26.9 ± 2.7**

26.9 ± 2.2**

39.8 ± 2.7**

32.5 ± 1.7**

Tensile Strength (MPa)

3.2 ± 0.6

4.9 ± 0.4**

4.2 ± 0.6

4.3 ± 0.7*

5.3 ± 0.4**

4.9 ± 0.5**

  1. Statistical significance of differences compared to untreated stones: *, significant at P < 0.05; **, significant at P < 0.01
  2. Data are the means of three replication ± standard errors