| dc.description.abstract | Material commonly used in buildings, adhesive mortars are present on facades, walls and floors,
composing a coating system that, due to its situation of direct contact with the environment, is under
tensions that may vary with time. The study hereby performed and presented in this document, is the
experimental study of adhesive mortars previously classified as A, B, C and D. These mortars were
classified according to consistency, open time, slip, adhesion resistance, compression resistance, static
tensile strength in flexion, static and dynamic elasticity modules and fatigue in flexion tensile. For this,
180 prismatic and 12 cylindrical specimens were molded. The fatigue failure studies were carried out
through a tensile test in flexion with a fixed frequency of 10 Hz, using the stress ratios 0.9, 0.8, 0.7 and
0.6 of the static rupture stress. The number of cycles until their ruptures were recorded and used to
obtain S-N graphs for each material. The results showed that the studied material presents a high
coefficient of variation the closer the actuation loads are to the breaking limits, fatigue life between 104
and 105 cycles, absence of fatigue resistance limit in the range of relative stresses used. Mortar B
presented the greatest uncertainty and the lowest number of average cycles and Mortar C presented
the best result in this regard. Regarding the elasticity modules, mortars with smaller modules showed
higher numbers of fatigue cycles. After the characterization tests carried out on the 4 types of adhesive
mortars, the mortars could be classified as ACI for mortars A, B and C and ACII for D, according to NBR
NBR 14081-1 to 5. | eng |
