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Bulletin of the National Research Centre

Table 7 Densification parameters of the fired batches

From: Flux ceramic tiles based on Egyptian trachyte

Firing temperature °C

Batch no

Bulk density (g/cm3)

Apparent porosity (%)

Water absorption (%)

Linear shrinkage

1140

1

2.12

15.15

7.15

7.53

2

2.07

10.86

5.25

6.60

3

2.20

7.58

3.45

7.51

4

2.29

7.0

3.06

7.56

1160

1

2.27

13.43

5.92

6.80

2

2.29

11.14

4.86

6.48

3

2.31

5.71

2.47

7.25

4

2.23

7.19

3.22

7.79

1180

1

2.20

11.63

5.29

7.68

2

2.25

10.0

4.40

6.79

3

2.28

5.28

2.32

7.11

4

2.30

5.42

2.36

7.48

1200

1

2.23

8.37

3.75

8.24

2

2.23

6.29

2.73

7.13

3

2.16

5.30

2.45

6.24

4

2.19

5.66

2.59

6.55

1220

1

2.29

7.79

3.40

8.65

2

2.24

3.83

1.71

7.49

3

2.18

3.10

1.42

6.04

4

2.26

2.31

1.02

7.17

1240

1

2.28

7.40

3.25

8.42

2

2.30

3.58

1.56

7.43

3

2.19

2.49

1.14

6.24

4

2.19

2.95

1.35

7.27

1260

1

2.37

5.58

2.35

8.91

2

2.30

2.84

1.24

7.14

3

2.11

6.17

2.92

4.44

4

2.15

4.90

2.28

5.22

1280

1

2.36

5.0

2.15

8.68

2

2.20

1.56

0.72

6.25

3

1.97

4.21

2.14

3.72

4

2.08

4.93

2.38

4.73

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