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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Concrete Q&A: Streaks in Polished Concrete Slab
Publication: Concrete International
Appears on pages(s): 71-72
Abstract:Q. Our company was the concrete subcontractor for
a small slab (5000 ft2 [465 m2]). A second
subcontractor polished the slab after we left the
jobsite. The specification called for a flatness F-number (FF)
of 25, so we placed the slab using a wheel-mounted laserguided
screed. The general contractor didn’t have the slab
measured for F-numbers; however, we’re confident that we
met the specification. We have been notified that the owner
has rejected the slab, citing cream streaks that became visible
during the polishing process. The general contractor is
looking for an answer as to what caused the
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