Twenty-eight days is the most repeated number in residential concrete and the most misunderstood. In one week I heard a homeowner told to keep every vehicle off a new driveway for a month, and watched a finishing crew drive a…

A 5,400 square foot equipment yard apron was placed on a July morning and sawed the next day starting at 9:40. By then three panels had cracked full depth, right across where the saw lines were about to go. That…

Two winters after the flex yard was poured, I called the contractor about a crack running eight feet across the lane where delivery trucks turn. He asked me to read him the line from the bid. It said “fiber reinforced,…

You can read a failed slab from the underside. We broke out a shop apron last fall and flipped the pieces over on the pile, and pressed into the crushed base were four dish-shaped depressions, each about the width of…

Most of the broken floors I get called out to look at were broken before anybody bought a bucket of resin. There is a shop in Manitou Springs I still think about — 5,000 square feet of decent 4,000 psi…

Behind a shop off Park Street in Riverside is a pad we poured to replace one a roll-off container destroyed in a single afternoon. The old slab was four inches, 3,000 psi, wire mesh that had ended up lying flat…