What are concrete joints and where should I put them?
Concrete joints are straight horizontal cuts in the slab. They are used to control cracking in the slab. The rule for concrete joint spacing is 2.5 times the depth of the slab. The joints should be cut 1/4 to 1/3 of the depth of the slab. Joints can be cut in by hand while the concrete is still plastic with a tool called a groover, or cut in with a concrete saw after final set has occurred. Example: 4 in thick slab should be cut at least one inch deep.
Related Questions
- The pay item is 10" concrete, but the specs call for 4" inlay and appears to design the joints around a 4" thick slab. Also, will the 10" pavement require dowel bars and tie bars?
- Can a concrete structure be completely free of expansion joints and contraction joints?
- Are control joints necessary with pervious concrete?
