Coatings for Concrete Protection against Aggressive Environments

Abstract

The effect of polymeric coatings on concrete protection against chemically aggressive environments was evaluated. Two polymers -acrylic and epoxy -were applied on different concretes. The protection was measured by tests related with chemical resistance. The chlorides penetration, sulphates, acids and bases attack tests were used. Surface treatments act as a barrier between the environment and the concrete. This work intends to contribute to a better understanding of the performance of coated concrete in chemically aggressive environments, by presenting results of ion diffusion and resistance to aggressive solutions of several coatings used to protect concrete. The performance of the used coated concretes against chemically aggressive environments was generally better than the performance of the unprotected concretes. The results indicate that the overall performance of the used epoxy resin was better than that of other used coatings.

Sulfate and acid resistance of lithomarge-based geopolymer mortars

“…This has multifaceted consequences: financial, social and environmental, associated with costly maintenance or replacement of the damaged structure. The problem of chemical attack may be addressed by applying layers of sealants or coatings on the concrete surface, or creating a physical barrier between concrete and the aggressive environment via protective overlays [13][14][15].…”

The study of an energy efficient cool white roof coating based on styrene acrylate copolymer and cement for waterproofing purpose—Part I: Optical properties, estimated cooling effect and relevant properties after dirt and accelerated exposures

“…It is inherently a porous material [3][4][5][6], and its surface inevitably contains micro-pores, micro-voids and microcracks [3,4,7]. These structural defects provide easy paths for water penetration into the interior of the concrete [4,7].…”

Escolha de produtos para proteção de superfície em concretos frente à ação de íons cloretos em zonas marítimas: uma aplicação da Análise Hierárquica (AHP)

“…Assim, elementos de concreto sujeitos a estas ações podem apresentar perdas graduais da estanqueidade, principalmente pela interconexão destas fissuras [1,2]. Mesmo um concreto sendo cuidadosamente dosado, é necessário que se tenha consciência de sua durabilidade, para que não ocorra casos de sua estrutura sofrer deterioração prematura [3]. De acordo com a ACI Committee 201 (2008) [4], a durabilidade do concreto de cimento hidráulico pode ser definida como a habilidade de resistir às ações das intempéries, ataques químicos, abrasão e outros processo de deterioração.…”