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Pinto Concrete—Is there a cure?
 Q:
We had a concrete walkway put in a week ago and there are still
a lot of dark areas as well as water-stain-like markings. Is this
normal? Should we be wetting it down and if so, how often?
 A:
It is not uncommon for concrete to have some mottling
at an early age. Typically, it is advisable to treat the concrete
with a series of wet and dry cycles (with warm or hot water if possible)
to help stabilize the color. A helpful reference for further reading
would be an article from PCA’s Concrete Technology Today
newsletter called "Pinto Concrete: Is There a Cure?,"
which you may access here.
There is a more comprehensive discussion of discoloration issues
in PCA publication
IS177, Concrete Slab Surface Defects: Causes, Prevention, Repair.
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