Issue 59

ZB. Xia et alii, Frattura ed Integrità Strutturale, 59 (2022) 49-61; DOI: 10.3221/IGF-ESIS.59.04

Figure 1. The design dimensions of the test specimen (unit: mm)

No. of test specimen

Volume fraction of steel fibers/%

Splitting tensile strength/MPa

Compressive strength/MPa

ρ /%

N-0-0 DC-30 DC-50 DC-70 DC-100 SFC-0.4 SFC-0.8 SFC-1.2 SFC-.16

0

0 0 0 0 0

2.27 2.00 1.94 1.43 1.31 2.40 2.65 2.96 3.25 2.08 2.15 2.54 2.58 1.80 1.93 2.20 2.25 1.45 1.81 2.02 1.99 1.40 1.68 1.29 1.71

43.21 40.81 35.70 36.52 32.33 50.98 54.82 55.70 57.18 45.23 47.40 51.70 53.22 44.01 44.69 49.31 47.14 40.36 40.18 41.29 39.69 32.68 34.73 39.70

30 50 70

100

0 0 0 0

0.4 0.8 1.2 1.6 0.4 0.8 1.2 1.6 0.4 0.8 1.2 1.6 0.4 0.8 1.2 1.6 0.4 0.8 1.2 1.6

SFDC-30-0.4 SFDC-30-0.8 SFDC-30-1.2 SFDC-30-1.6 SFDC-50-0.4 SFDC-50-0.8 SFDC-50-1.2 SFDC-50-1.6 SFDC-70-0.4 SFDC-70-0.8 SFDC-70-1.2 SFDC-70-1.6 SFDC-100-0.4 SFDC-100-0.8 SFDC-100-1.2 SFDC-100-1.6

30 30 30 30 50 50 50 50 70 70 70 70

100 100 100 100

38.85 Table 4: The design parameters of the test specimen (DC: recycled concrete; SFC: steel fiber concrete; SFDC: steel fiber recycled concrete)

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