CONCRETE COLOURANTS
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United States of America Patent
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Issued Date -
Jun 29, 2017
app pub date -
May 25, 2015
filing date -
May 23, 2014
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Abstract
A method of colouring cementitious building materials such as concrete is disclosed. The method uses flowable, spray-dried, particulate formulations of inorganic pigments prepared using a selection of formulants that do not substantially effect primary ettringite formation. Quantities of the formulations may conveniently be dispensed into a slurry of cement and water by gravimetric or volumetric means.
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