*3.1. Fresh State*

The mortar's workability was measured by the consistency test. To improve the comparability of the results, the values were limited to 140 ± 5 mm. The mortars presented a stiff consistence, but an application on a brick was carried out to ensure that an adequate workability was achieved, as shown in Figure 2.

**Figure 2.** Mortar application on a brick.

It was noticed that the fibers kept the mortar agglutinated. Although the workability was acceptable, the flor value did not increase due to the fibers' agglutinating action. In order to illustrate this behavior, Figure 3 presents the flow table test of the W 1.5\_10%c sample.

**Figure 3.** Flow table test for the modified mortar.

Table 4 presents the results of the fresh mortars' properties.


**Table 4.** Fresh mortar properties.

In all cement-lime mortars, the water/binder ratio was higher than that of the cement mortars. The incorporation of 10% of wool fibers increased the amount of water needed to maintain the workability. This could be due to the morphology of the fiber, which is composed of keratin filaments [5]. However, the incorporation of 20% of fibers again decreased the water/binder ratio to values similar to the control mortar. This trend reversion may be due to the fact that the longer fibers have a lower bulk density and thus a lower weight of incorporated fibers is actually used (Table 2). The modified mortars presented a lower bulk density than that of the reference mortars.
