Concrete Slab On Grade Expansion Joint Detail. The contraction joints are allowed to be infiltrated by large Suprenant, sawcutting joints in concrete, concrete construction, january 1995. The pavement is divided into long panels (60 ft or more) without contraction joints in between to control transverse cracking.
DIY Concrete Guide: Controlling Cracks - Slab on Grade ...
Result is a lightly reinforced slab designed to offset the effects of temperature and shrinkage of the concrete. Timing of jointing operations depends on the method used: The load transfer at sawcut joints is typically negligible if, due to drying shrinkage and temperature shortening, the joint opens up wider than 0.04 inch through the depth of the slab.
Gallery of Concrete Slab On Grade Expansion Joint Detail
A 4 thick slab should have joints 1 deep. Keyed joints fail due to the outer parts of the key breaking. While it is common for joints to widen more than 0.04 inch at the surface, the width often narrows quickly with depth so that effective aggregate interlock load. Table 2 suggests joint spacings for various pavement thicknesses.
