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Protection of concretes against chemically aggressive environments
Aguiar, J. L. Barroso de; Camões, Aires; Moreira, Pedro M.It is now accepted that the durability of reinforced concrete depends mainly on the composition and properties of the concrete surface layer. This layer, sometimes with a thickness close to the cover of the reinforcement, is most of the times the only responsible for the corrosion protection of the reinforcement. Surface treatments act as a barrier between the environment and the concrete. They prevent or retar...
Ranking procedure for polymeric coatings and hydrophobic agents for concrete pr...
Aguiar, J. L. Barroso de; Moreira, Pedro M.; Lukowski, Pawel; Czarnecki, Lech; Camões, Aires; Gemert, D. vanA ranking procedure, developed by Czarnecki and Lukowski, is applied on a series of concrete protection products. The ranking procedure is applied to evaluate durability experiments, carried out on some commercially available silicone, acrylic and epoxy compounds for surface treatment of concrete. The ranking procedure transforms experimental data of properties into one numerical value, by which the products ca...
Evaluation of polymeric coatings and primers against chloride ingress in concrete
Aguiar, J. L. Barroso de; Schueremans, Luc; Moreira, Pedro M.; Camões, Aires; Gemert, D. vanNowadays, it is common knowledge that the biggest degradation of concrete is caused by outside to inside actions. Penetration of moisture, active gases and aggressive ions, as well as mechanical, physical and chemical causes frequently act together. A low porosity and low permeability of concrete to penetration of moisture and gases are the first lines of defence against several deterioration mechanisms. One of...
Performance of protected concrete against chemically aggressive environments
Aguiar, J. L. Barroso de; Moreira, Pedro M.; Camões, AiresThree different types of surface protections were tested: silicone hydrophobic agent, acrylic and epoxy coatings. Surface treatments act as a barrier between the environment and the concrete, preventing or retarding the entry of harmful substances and cutting off the transportation path into concrete. There is a linear relation between the ionic permeability of the resin and the electrolytic conductivity of the...
Systems for superficial protection of concretes
Moreira, Pedro M.; Aguiar, J. L. Barroso de; Camões, AiresNowadays, it is consensual that the biggest degradation of concrete happens from outside to inside actions, due to the penetration of moisture, active gases and aggressive ions, by mechanical, physical and chemical causes that frequently act together. A low porosity, permeability and concrete penetration to moisture and gases are the first lines of defence against several deterioration mechanisms. The durabilit...
Contribuição dos revestimentos poliméricos para a durabilidade de betões em amb...
Moreira, Pedro M.Dissertação de Mestrado em Engenharia Civil - Área de Materiais e Reabilitação da Construção ; Actualmente é consensual que a principal degradação do betão deve-se a acções que ocorrem do exterior para o interior, devido à penetração de humidade, gases activos e iões agressivos, por métodos mecânicos, físicos e químicos, que frequentemente ocorrem juntos. Uma baixa porosidade, permeabilidade e penetração no be...
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