Title:
Innovative Slab-on-Ground Construction Method
Author(s):
Warwick Colefax
Publication:
Concrete International
Volume:
28
Issue:
6
Appears on pages(s):
63-65
Keywords:
cracking; joint free slab; joints; saw cutting; slab-on-ground
DOI:
Date:
6/1/2006
Abstract:
An alternative to jointed slab construction was recently introduced in North America. Joint free slabs use a grid of crack inducers that are positioned at the base course, before the concrete is placed. As the slab hardens and shrinks, a closely spaced, regular network of fine cracks is formed above the grid, thus eliminating the need for joints. The joint free slab system therefore avoids the problem of saw cutting the slab before microcracks form in the concrete, as well as many other problems associated with slab joints.