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Table 15 Compressive strength, tensile strength, shear strength, longitudinal wave velocity, rebound number, and Toughness Indexes tests results of backing limestone blocks Mykerinos pyramid

From: Sustainability problems of the Giza pyramids

No.

D (mm)

H (mm)

A2 (mm2)

Failure load (kN)

σc (MPa)

σt (MPa)

Shear strength (N/mm2)

Vp (km/s)

(RN) rebound number

Toughness Indexes (AIV test)

1

35.7

68

990.3

13.50

13.11

2.70

0.89

5.26

25

9.50

2

37.2

70

1034.6

12.10

12.23

1.99

1.33

5.10

22

8.80

3

35.2

69

922.8

14.22

13.28

2.98

1.46

4.97

20

9.80

4

37.2

72

1180.1

14.30

12.20

2.11

1.22

4.67

19

7.01

5

37.2

72

1150.5

15.80

10.79

1.79

1.11

3.76

17

6.24