ATLAS OF ARCHITECTURAL CONCRETE: colored cement mixtures and their interaction with wooden molds

A.R. DI SARLI; A. LÓPEZ

Santiago

Congreso; AIC 2016 Interim Meeting ?Color in Urban Life: Images, Objects and Spaces; 2016

AIC

The architecturalconcrete is a construction material composed of cement, admixtures, sand,stone, chemical additives, etc. The architectural characteristic of this typeof concrete is provided by its surface which presents several aestheticaspects, such as color and texture that provide different finishes. Color isthe consequence of cement and pigments incorporation. Systems or Atlas wereelaborated following diverse principles that sketching figures, classify colorsaccording to their differente lightness, saturations and hues. For that, asystematization of the color-surface finish concepts and the ingredientesinvolved in their production is proposed. The present work presents diagrammedpichtures with information summarized to develop an Atlas. Two groups ofmortars were elaborated, each group with red, yellow and black pigments. Thecolor was defined by CIELAB color space and their evolution was compared by CIEDE1976and CIEDE2000 color difference formulas. The gloss was analised too. Resultswere represented in six pictures to allow quantification and visualization ofthe different colored mortars. An important color variation was observed fromday 7 to day 28. The strong formation of calcium carbonate deposits associated toan increasing gloss was a discouraging result.