Tomás S. Damião, Maria S. Ribeiro, Orlando A. Pereira
Within the scope of the repair of concrete structures, localized repair with repair mortars is one of the most used methods, mainly because both the manufacture and the placement of repair mortars are similar to those of conventional mortars. The first part of this paper discusses the importance of repair mortars, as well as the relevant aspects of the concrete degradation, and sets out the principles and methods for repair, which are recommended by EN 1504-9. The second part of this work addresses the need to prove some analytical theories, particularly regarding the need to mix water with the repair mortars and the best way to get the desired workability for each W/C ratio established. The main object of the third part of this work was the development of a software to support the formulation of repair mortars, which resulted from the conjugation of several factors such as: the collection of all the knowledge acquired during the work and the inclusion of normative specifications in use, which are required for a structural repair mortar in articulation with the durability demands for a lifetime of 50 years. To conclude, the developed work contributed to increase the knowledge about the repair mortars and the durability of local repairs using mortars. The work is characterized by having as final result a practical application capable of materializing relevant information and confirming the promising results obtained with cementitious mortars modified with polymers.
Key words: Repair mortars; Formulation; Polymers; Durability.