Pigments and Volumetric Coloring

Pigments and Volumetric Coloring Volumetric methods for coloring of the molding mix with iron oxide pigments, when manufacturing the silicate brick, have been studied. Issues of the coloring of the mix with slaked lime and quicklime are considered. The time of appearance of the mix color and its intensity was fixed at the stage of coloring. It is established that good coloring of light tones with the pigment is reached at introducing the pigment before the lime slaking. Introduction of the pigment in the slaked mix demands to increase the mixing intensity. Adhesion of the slaked lime impedes the distribution of the pigment in the mix that leads to the loss of products color. Quicklime as an abrasive material contributes to the distribution of the pigment in the volume. When coloring the slaked mix with light pigments, it is necessary to increase the mixing intensity. The intensive mixing leads to the strength growth. The introduction of pig- ments of bright tones with great coloring ability with the purpose to reduce the losses at color transition is recommended in the slaked lime. Physical-mechanical characteristics of pressed samples as a result of introducing the pigment in the slaked lime and quicklime were studied. It is established that the increase in the quantity of the pigment (over 2%) in the slaked lime leads to reducing the raw and autoclaved strength of pressed products

G.V. KUZNETSOVA, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.),
N.N. MOROZOVA, Candidate of Sciences (Engineering)

Kazan State University of Architecture and Engineering (1, Zelenaya Street, 420043, Kazan, Russian Federation)

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