A sidewalk section that is badly cracked or heaved is easier to replace than repair. Break out the bad concrete with a sledge hammer. Stake 2-by-4 forms against the sides of the adjoining sections. Mix bagged concrete with water and fill the forms.
The trick to making your new walk level and flat is called screeding. This technique is like overfilling a measuring cup with flour, then striking off the excess with the back of a knife.
You’ll need several finishing tools; buy them if you expect to use them a few times.
Smooth the surface by drawing a wooden float across the slab. To create rounded edges slide an edger back and forth along the forms. Cut control joints with a groover. Guide the groover against a straightedge tacked to the forms.

Professional tip
As soon as the surface water disappears, sweep arcs across the slab surface with a wood float. This makes the surface more dense.

If you enjoyed this post, make sure you subscribe to my RSS feed!