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
Keywords:
DOI:
10.14359/51689275
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?
Related References:
1. ACI Committee 302, “Guide for Concrete Floor and Slab Construction (ACI 302.1R-80),” American Concrete Institute, Farmington Hills, MI, 1980, 46 pp.
2. Campbell, R.H.; Harding, W.; Misenhimer, E.; Nicholson, L.P.; and Sisk, J., “Job Conditions Affect Cracking and Strength of Concrete In-Place,” ACI Journal Proceedings, V. 73, No. 1, Jan. 1976, pp. 10-13.
3. ACI Committee 302, “Guide for Concrete Floor and Slab Construction (ACI 302.1R-89),” American Concrete Institute, Farmington Hills, MI, 1989, 45 pp.
4. ACI Committee 302, “Guide for Concrete Floor and Slab Construction (ACI 302.1R-96),” American Concrete Institute, Farmington Hills, MI, 2004, 67 pp.
5. ACI Committee 302, “Guide for Concrete Floor and Slab Construction (ACI 302.1R-15),” American Concrete Institute, Farmington Hills, MI, 2015, 76 pp.
6. Kanare, H.M., “Concrete Floors and Moisture,” EB119, Portland Cement Association, Skokie, IL, 2005, 156 pp.
7. Tarr, S.M., and Farny, J.A., “Concrete Floors on Ground,” EB075, fourth edition, Portland Cement Association, Skokie, IL, 2008, 256 pp.