3.1.1. Consistency Index

According to the ABNT NM 13276 [24,36] standard, it is recommended to adopt the amount of water required for a consistency index of 260 ± 5 mm. Table 3 shows the results obtained by the related test.


**Table 3.** Consistency index test results.

<sup>1</sup> HA—horizontal average; <sup>2</sup> VA—vertical average; <sup>3</sup> TA—tilted average; <sup>4</sup> W/C—water/cement.

Thus, following the margin established by the aforementioned standard, the averages of all replacements (0%, 10%, 30% and 60%) of sand by OSPW in the three different types of cement (CP II, CP III and CP V) presented results within the acceptable limit.

Analyzing the water/cement ratio of the mortars produced, it was found that all the percentages of 10%, in the three different types of cement, had the lowest ratio, with the percentage of 10% in Portland cement type CP V being the lowest, with 1.19.

Taking into account that the lower the water/cement ratio, the greater the resistance, the lower the permeability and the greater the durability [37], the mortars produced with 10% substitution in cement type CP V have an advantage over the others.
