Title:
Concrete Q&A: Dominant Joints in Concrete Slabs-on-Ground
Author(s):
Scott M. Tarr
Publication:
Concrete International
Volume:
38
Issue:
7
Appears on pages(s):
67-68
Keywords:
DOI:
Date:
7/1/2016
Abstract:
As a designer of industrial concrete floors, I’ve always placed a priority on reducing the potential for slab cracking. One of the approaches I have used is to minimize restraint to drying shrinkage by lowering friction on the underside of the slab. For example, I might specify a layer of sand on top of a crushed stone base to choke off the surface of the stone and create a smooth interface between the base and slab. Recently, however, some contractors and owners have expressed concerns regarding “dominant joints.” What are dominant joints and how can they be avoided?