PSI - Issue 11

Stefanie A. Campos et al. / Procedia Structural Integrity 11 (2018) 145–152 Stefanie A. Campos et al./ Structural Integrity Procedia 00 (2018) 000–000

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Fig. 5. Tensile strength of slag mortar specimens to that of reference mixtures at 7 and 28 days.

Fig. 6. Compressive strength of slag mortar specimens to that of reference mixtures at 28 days.

As for tensile bond strengths, the average strengths of 0.32 ± 0.06 MPa were obtained for the 0% mix, 0.27 ± 0.02 MPa for the 10% mix, 0.26 ± 0.3 MPa for the 20% mix and 0.30 ± 0.04 MPa for the 30%. Tensile strength must be greater than 0.2 MPa for internal walls with paint finish and at least 0.3 MPa for internal walls with ceramic trim and external walls. It is observed that the traces meet specifications for use in all situations, since a statistical ANOVA analysis provided a p value of 0.314, demonstrating that the increase of content of steel slag up to 30% does not lead to a significant decrease in averages of resistance. It is worth mentioning that the mixes executed do not contain lime, a material that could raise the average resistances due to its high-water retention power during