Microstructural and topographic characterization of concrete protected by acrylic paint

Abstract

Concrete structures must be designed and constructed so as to resist the conditions established in the project design and suffer no deterioration for many years. In highly aggressive environments, in addition to the minimum layer covering the framework, the concrete must receive a protective coating. In this work, the efficiency of acrylic paint as a protective coating, while the concrete was placed in an aggressive environment, was assessed utilizing a profilometric and microstructural characterization. The concrete was dosed using the ACI -American Concrete Institute method. The specimens were prepared with 370 kg.m -3 of cement and the water-binder ratio of 0.50 corresponds to the value established in NBR6118 1 types for concrete subjected to highly aggressive environments. With the use of profilometry, 3D topographical images and surface roughness parameters were generated, which allowed for the identification of the degradation process and the minimization of the effect of this attack on concrete that had received surface protection. The topographic roughness parameters, as well as the images and chemical components identified using SEM/EDS, made it possible to identify the process of deterioration of the concrete under acid attack and to minimize such effect in the coated concrete. The methodology adopted demonstrates that the application of acrylic paint as a protective coating for concrete in an aggressive environment minimizes its surface degradation and increases its durability.

Wettability of Graffiti Coatings by Green Nanostructured Fluids

“…3 exhibit deep pores and significant elevations, as demonstrated by the R t parameter values. These data align with those reported by the other researchers [12,29] . Conversely, paint no.…”

“…These data align with those reported by the other researchers. [12,29] Conversely, paint no. 1, which lacks the aforementioned additives, does not form a rough graffiti coating structure during the drying phase.…”

Benefits of using nonionic saccharide surfactant‐based detergents for nanostructured fluids as stubborn graffiti paint remover

“…It is interesting to note that paint (2), which contained bitumen, had 1.3% more summits over 4 μm, for a total of 8.3%. The images and data make it evident that the surfaces of the investigated paints had deep pores and high elevations, as demonstrated by the values of the R t parameter, which were similar to those obtained by other authors (Pogorzelski et al, 2022; Ribeiro et al, 2013). The drying process of the paint on the substrate might result in structural differences between different coats of paint (Ploeger et al, 2008; Pozo‐Antonio et al, 2022).…”

Robust microencapsulated phase change materials in concrete mixes for sustainable buildings

“…The structure is a typical image of rough cement matrix [45], which is a result of the hardening process of in any cement. In Figure 11b, calcium hydroxide, also known by its mineral name, portlandite crystals, with a wide range of hexagonal shapes and sizes seen in hardened concrete [46], is surrounding the microcapsules. In both cases, the microcapsules are not affected by these rough structures surrounding them.…”