Resumo

RESTREPO GUTIERREZ, JUAN CAMILO; RESTREPO BAENA, OSCAR JAIME  e  TOBON, JORGE IVÁN. EVALUATION OF WHITE CEMENT COLOURED WITH ULTRAMARINE BLUE PIGMENT. Dyna rev.fac.nac.minas [online]. 2009, vol.76, n.157, pp.225-231. ISSN 0012-7353.

In this study the performance of white cement coloured with ultramarine blue pigment was evaluated. The performance is explained through of the mineralogical changes occurring in the replacement of cement by pigment in percentages of 5, 10, 15 and 20%. It produced concrete and pastes to be studied to 3, 7, 28 and 90 days of standard cured. It was found that the ultramarine blue pigment to come in touch with the C3A of cement and water, allows the formation of large quantities of primary ettringite (disordered and dispersed in the matrix), thank to its sulphur content. It implies an increase of mechanical strength of the concrete blended whit Ultrramarine blue pigment as much as 45% to 90 days of standard curing.

Palavras-chave : Cemento blanco pigmentado; hormigones coloreados; azul ultramar; etringita primaria; cemento adicionado.

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