Issue 55

M. Mani et alii, Frattura ed Integrità Strutturale, 55 (2021) 50-64; DOI: 10.3221/IGF-ESIS.55.04

After performing the experiment, we have the following results as illustrated in Table 6. Then, all the tested concretes are considered flexible according to the standard ENV 206: 1990.

Time in seconds

Composition

W/C

Sand Dune 100% (GSD) Natural Sand 100% (NSR) 40% Sand Dune (GSD) + 60% Natural Sand (NSR)

0.6

30.5  2

0.55

23  2

0.55

25  2

Table 6: The obtained results of the workability test.

Various sand concrete studied The composition of the samples used in our cubic meter of sand concrete is presented in Table 7 according to different used types of sand.

Time of streaming- operational

Sand (Kg)

Cement (Kg)

Water (L)

Composition

W/C

0.6

1396.63

465.54

2  30.5 S

Sand Dune 100% (GSD)

279.32

0.55

1390.04

463.34

2  25 S

Natural Sand 100% (NSR) 40% Sand Dune (GSD) + 60% Natural Sand (NSR)

254.84

1392.39

464.13

255.27

0.55

2  25 S

Table 7: Composition of the sand concrete for the studied samples. The experimental volumetric mass of the studied concrete are shown in Table 8 relative to each type of used sand.

40% Sand Dune (GSD) + 60% Natural Sand (NSR)

Sand Dune 100% (GSD)

Natural Sand 100% (NSR)

Samples

Volumetric mass (kg/m 3 )

2135

2141.5

2132.4

Table 8: Volumetric mass of studied sand concrete.

Test methods The experiment is conducted according to EN 196-1 as shown in Fig. 2. The test is carried out using a solid material compression device. This later comes from the sample breaking experiment by bending with a section of (40x40)mm. This sample that’s placed between two hard metal plates where the latter is located 1cm from the side edges as shown in Fig. 2. The strength is measured by using the following equation (1):

 ² C C R F b

(1)

C R : Compressive strength (MPa) C F : Load of rupture (N) ² b : Cross-sectional area (b=40mm)

54