Title:
Concrete Q&A: Reinforcement through Contraction Joints in Slabs-On-Ground
Author(s):
Publication:
Concrete International
Volume:
10
Issue:
46
Appears on pages(s):
75-76
Keywords:
crack, cut, amount, percentage
DOI:
Date:
10/1/2024
Abstract:
The general purpose of reinforcing bars in slabs-on-ground is to control crack widths at the top surface of a slab. As the amount of reinforcement increases across the joint, the probability of out-of-joint cracking increases, as tighter cracks may occur at closer spacing than the joints. The Q&A provides some guidance on the amount of reinforcement crossing the joint and its role.
Related References:
1. ACI Committee 360, “Guide to Design of Slabs-on-Ground (ACI 360R-10),” American Concrete Institute, Farmington Hills, MI, 2010, 72 pp.
2. ACI Committee 224, “Guide to Design Detailing to Mitigate Cracking (ACI 224.4R-13),” American Concrete Institute, Farmington Hills, MI, 2013, 20 pp.
3. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19) (Reapproved 2022),” American Concrete Institute, Farmington Hills, MI, 2019, 624 pp.