|
Frequently Asked Questions
Cement & Concrete
Technology Home > FAQs > Use of pigments
in shotcrete
Q: Can I use colorants/pigments in a shotcrete
application and change the color over the length of a wall?
 A:
The use of mineral oxide pigments in a shotcrete application is
probably not different from their use in a cast-in-place, mortar,
or thin specialty topping application. The typical recommendation
(ASTM C 979) is to use only the minimum color pigment required to
achieve the desired color (never more than 10% by mass of cement)
and to consider the use of white cement if the final color is to
be cleaner or brighter. Changing colors should not be a problem
as long as the expectation for the transition from one color to
the next is reasonable. A good reference with more information on
this topic is Finishing
Concrete with Color and Texture.
|