3.1.3. Mass Density

The density test was carried out in accordance with ABNT NM 13278 [28], and the mass of the full container was recorded. Then, the mass density of each mixture was calculated in the different substitutions (0%, 10%, 30% and 60%) in the three types of Portland cement (CP II, CP III and CP V). Tables 7–9 show the values obtained, respectively, by CP II, CP III and CP V cements.

**Table 7.** Mass density of Portland cement type CP II.



**Table 8.** Mass density of Portland cement type CP III.

**Table 9.** Mass density of Portland cement type CP V.


Analyzing the mass density in Portland cement type CP II, it appears that the mortar with the lowest density was the one with 0% replacement of sand by the residue with 1.88 g/cm<sup>3</sup> , while the mortar with the highest density was the one with 30% replacement with 2.01 g/cm<sup>3</sup> . In the case of cement type CP III, the opposite occurs, where the mortar produced with 30% replacement has the lowest density with 1.62 g/cm<sup>3</sup> and the mortar with 0% replacement has the highest density with 1.94 g/cm<sup>3</sup> .

In Portland cement type CP V, the same occurs as for CP II, the mortar with the lowest density is the one with 0% replacement with 1.90 g/cm<sup>3</sup> , and the one with the highest density is the one with 30% replacement with 2.03 g/cm<sup>3</sup> . Analyzing the densities in the three types of cement, the one that presents the highest density is the Portland cement type CP V, while the type CP III presents the lowest density.

Although the mortars tested in the three types of cements in percentages of different replacements show variations in densities, most are around 2 g/cm<sup>3</sup> , and densities lower than those mentioned are also obtained, bringing advantage to the mixture, as in the case of Portland cement type CP III with 30% replacement [40].
