Title: Concrete Q&A: Concrete Slab Curling Over Vapor Retarders

Author(s):

Publication: Concrete International

Volume: 38

Issue: 9

Appears on pages(s): 75-76

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DOI:

Date: 9/1/2016

Abstract:
Q. We have always been told that concrete slabs placed directly on a vapor retarder curl more than slabs cast directly on a prepared base. However, we recently measured a slab that we know had a vapor barrier only in limited areas. The portions cast over the vapor retarder had less curling than those cast directly on the base. What is the current industry understanding of this issue?