Issue 61

F. A. H. Saleh et alii, Frattura ed Integrità Strutturale, 61(2022) 89-107; DOI: 10.3221/IGF-ESIS.61.06

7

At 28 days

6

5

SCSC VC

SCSC PR SCSC SR SCSC GR

4

Flexural strength (MPa)

3

0

20

15

5

10

Rubber grain substitution rate (%)

Figure 7: Flexural strength evolution of concrete mixtures (VC, SCSC, SCSC GR, SCSC PR and SCSC SR) vs. rubber substitution rate (in %) after 28 days of curing period.

20 25 30 35 40 45 50 55 60 65 70 Compressive strength (MPa)

20 25 30 35 40 45 50 55 60 65 70 Compressive strength (MPa)

SCSC VC

At 28 days

At 7 days

SCSC PR SCSC SR SCSC GR

SCSC VC

SCSC PR SCSC SR SCSC GR

0

5

10

15

20

0

5

10

15

20

Rubber grain substitution rate (%)

Rubber grain substitution rate (%)

a) At 7 days.

b) at 28 days.

20 25 30 35 40 45 50 55 60 65 70 Compressive strength (MPa) SCSC VC

At 365 days

SCSC PR SCSC SR SCSC GR

0

5

10

15

20

Rubber grain substitution rate (%)

c) At 365 days. Figure 8: Compressive strength evolution of concrete vs. rubber substitution rate (in %)

98