Issue 62

B. Kebaili et alii, Frattura ed Integrità Strutturale, 62 (2022) 14-25; DOI: 10.3221/IGF-ESIS.62.02

FA

NA (5-10)

NA (10-20)

RFA

RAC (5-10)

RAC (10-20)

Cement

Categories

w/c

kg

RACC15 RACC25 RACC40

0.6

350+4%.RAC

0.65

418

172

482

279

114

321

0.6

RACC

0.65

367

NC

697

286

803

0.5

Table 3: Amount of aggregate, cement corrected and water.

10 12 14 16 18 20 22 24 26 28

Compressive strength (MPa)

NC

RCCPC15

RCCPC25

RCCPC40

RCC

Concretes

Figure 10: Compressive strength for normal and recycled corrected concrete after the mix correction.

Normal

corrected

4,71

5

4,19

4,10

3,85

3,71

4

3,65

3,51

3,39

3,21

3,18

1 Flexural strength (MPa) 2 3

0

NC

PC15

PC25

PC40

UP

Concretes

Figure 11: Flexural strength for normal and recycled concrete before and after mix correction. This method might be used to adjust the RAC mix prepared with a different recycled aggregate by using simply the absorption coefficient of each component. As can be seen, the RACC standard deviator was more than the NA. The RACC has a higher average strength than NA, although the standard deviator reveals that RACC is still more various. Flexural strength

22