Adhesive mortars are products consisting of natural or artificial sand, binder (cement) and chemical additives, which serve as adhesives for laying floor and wall tiles. Nowadays, the field evaluation of the product mixture is made empirically. The worker (plasterer) determines, by means of sensory aspects, the ease of mixing, classifying the mortar into heavy, light, soft, easy or difficult to mix. However, these descriptions are subjective and it is not easy to measure quantitatively the applicability of the product, and this may also lead to judgment errors, because each worker may have a different perception. The aim of this study is to evaluate two adhesive mortars by rotational rheometry. Adhesive mortars types ACI and ACIII, with different water contents, were submitted to rotational rheometry tests in order to evaluate both mixing and flow behavior. The results indicate that the mixing time of 150 s was enough to effectively homogenize and disperse the mortars. The mixing and flow torque values are higher for ACI than for ACIII, indicating that ACI is more difficult to mix and has higher viscosity than ACIII.
Rotational rheometry; Rheological characterization; Adhesive mortar
