Table 1 Density, compressive strength, bulk density and gypsum/water ratio of different “gypsum–paper” cylindrical samples

Office paper

1.30 ± 0.02^a

5.84 ± 0.25^a

0.100

Newspaper

1.26 ± 0.02^b

4.78 ± 0.24^b

0.094

Magazine paper

1.28 ± 0.02^b

4.48 ± 0.25^b

0.116

Corrugated board paper

1.30 ± 0.01^a

5.93 ± 0.37^a

0.095

Corrugated paperboard

1.30 ± 0.01^a

6.35 ± 0.32^a

0.098

Tetra Pak I

1.29 ± 0.03^a

6.46 ± 0.43^a

0.108

Tetra Pak II

1.34 ± 0.01^c

6.18 ± 0.64^a

0.115

F-value

8.148*

20.889*