Issue 62

S. S. Ahmad et alii, Frattura ed Integrità Strutturale, 62 (2022) 408-425; DOI: 10.3221/IGF-ESIS.62.28

splitting tensile strength. This is a rational result; also, it is well known in the literature that the fibers contribute to the tensile strength more than the compressive strength for most of the mixes tested. The increase of PP fiber content reduced compressive strengths and splitting tensile strengths. Silica fume as pozzolanic material needs more time to cure to be tested on ages more than 28 days. So, using percentages like 10% and 15%, the silica fume contents inside the mix contribute to the mechanical properties of the concrete as filler. In this study, silica fume of 5% was optimum, while the increase of SF content reduced the compressive strength.

Figure 14: Main Effects Plot for SN ratios for Compressive Strength at RT.

.

Figure 15: Main Effects Plot for SN ratios for Compressive Strength at 400 °C.

Figure 16: Main Effects Plot for SN ratios for Compressive Strength at 800 C.

417