Resumo

MARTINEZ, W. et al. Colorimetry of clays modified with mineral and organic additives. Rev. ALCONPAT [online]. 2018, vol.8, n.2, pp.163-177.  Epub 28-Ago-2020. ISSN 2007-6835.  https://doi.org/10.21041/ra.v8i2.277.

The objective of this investigation was to quantify the colorimetric values of clay with different types of additives. Aesthetic appreciation, based on the color of clay with different addition percentages (by clay mass), is explored using clay from the Santiago Undameo Bank, Mexico. The clay was kaolinite, and the additions were gypsum, lime, opuntia cactus mucilage, Portland cement, and sodium hydroxide. The addition percentages were 2%, 4%, 6%, 8% and 10%. The best colorimetric performances were obtained from Portland cement at 6%, sodium hydroxide at 4%, lime and gypsum at 8% and opuntia cactus mucilage at 4% and 8%. Some buildings where these clay materials were used are Casas grandes in Paquimé, Chihuahua, La Venta in Tabasco, and Yácatas in Tzintzuntzan, among others.

Palavras-chave : clay; colorimetry; additives; restoration.

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