Title:
Early-Age Thermal Cracking in Laser-Screeded Concrete Slabs
Author(s):
H. Haynes
Publication:
Symposium Paper
Volume:
204
Issue:
Appears on pages(s):
43-56
Keywords:
case history; concrete slabs; cracks; curling; early age;
fog curing; laser screed; slab-on-grade; temperature and shrinkage;
thermal strain; thermal stress
DOI:
10.14359/10813
Date:
8/1/2001
Abstract:
A case history is presented in which a laser-screeded slab showed more cracks than would be expected in conventional strip-cast slabs. It was determined that laser-screeded slabs are more sensitive to early-age, thermal cracking than strip-cast slabs because of extra restraint provided by fixed-edge boundary conditions. Among the possible solutions is closer spacing of contraction joints and fog curing during the first day.