3.2.1. Capillary Absorption

7 Days

14 Days

3.2.1. Capillary Absorption The capillary absorption test was carried out as per the ABNT NM 15259 [33] standard, from which two parameters can be taken to determine the phenomenon of capillarity in mortars: (i) the capillarity coefficient, and (ii) the water absorption by cap-The capillary absorption test was carried out as per the ABNT NM 15259 [33] standard, from which two parameters can be taken to determine the phenomenon of capillarity in mortars: (i) the capillarity coefficient, and (ii) the water absorption by capillarity at 90 m [40].

illarity at 90 m [40]. Three prismatic parts were made for each mix, using Portland cement types CP II, CP III and CP V, with cures of 7, 14 and 28 days, in the different replacement of sand by OSPW (10%, 30% and 60%). Table 13 shows the average of each percentage of the capil-Three prismatic parts were made for each mix, using Portland cement types CP II, CP III and CP V, with cures of 7, 14 and 28 days, in the different replacement of sand by OSPW (10%, 30% and 60%). Table 13 shows the average of each percentage of the capillarity coefficients of the mortars produced.

**Capillarity Coefficients Cure (Days) OSPW (%) CP II CP III CP V** 

28 Days 30 0.71 0.61 0.44 60 1.30 1.06 0.70

10 0.85 0.44 0.35 30 0.60 0.36 0.27 60 1.07 0.85 0.25

10 1.07 0.98 0.51 30 0.78 0.6 0.46 60 1.17 0.77 0.76 10 0.92 0.78 0.48


**Table 13.** Capillarity coefficients (g/dm<sup>2</sup> ·min1/2).

Thus, analyzing the capillarity coefficient in the prismatic specimens, made with Portland cement type CP II, it appears that the 60% replacement mortars, from sand to OSPW, showed a higher capillarity coefficient regardless of the curing time. On the other hand, the mortars produced with 30% replacement showed the lowest capillarity coefficient also regardless of the curing time.

In the specimens made with Portland cement type CP III, the 30% replacement mortars, at all curing times, showed the lowest capillarity coefficient. In mortars with curing times of 7 and 28 days, the highest capillarity coefficient is at 60% replacement, while at 14 days of curing, it is at 10% replacement.

In Portland cement type CP V, mortars with curing times of 14 and 28 days presented the highest coefficient at 60%, while at 7 days of curing, the highest coefficient is at 10% replacement. As with mortars made with cement type CP II and CP III, the lowest coefficient is found at 30%, when analyzed at 14 and 28 days, while at 7 days of curing, the lowest value is at 60% of replacement.
