The contemporary architecture scenario demonstrates the search for innovative
materials that meet the demands of durability, load, economy, beauty and
sustainability. In this context, architects explore the use of chromatic concrete, so
that a structural element also becomes an aesthetic element. Chromatic concrete
can be produced with white Portland cement or conventional Portland cement,
but white Portland cement has a higher cost and conventional Portland cement
has reduced pigment capacity. A more viable alternative for chromatic concrete
production would be the use of LC³ (Limestone Calcined Clay Cement), a material
that partially replaces cement with mineral additions such as limestone and
metakaolin. In addition to its lower cost compared to white Portland cement, LC³
can also offer greater pigment capacity than conventional Portland cement.
Another benefit of LC³ is the reduction of carbon dioxide release due to the lower
amount of clinker in its composition. In this sense, the present research aimed to
comparatively evaluate the colorimetric performance of LC³ in relation to
conventional Portland cement. The results obtained in this research were very
satisfactory, since the achieved parameters demonstrated that the total color
difference between the LC³ and conventional Portland cement (CPIIF40) plates
is quite sharp, being easily noticed in a simple visual evaluation. LC³ was also
effective in combating efflorescence, reducing the surface porosity of the plates.
Variations between textures (smooth, slatted and bamboo) were also analyzed,
indicating that rougher surfaces tend to darken the color of the material.
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