Control joints are deep cuts in concrete used to prevent random cracking. When the inevitable shrinkage happens, the cracks form along the seam of the control joint. This uniquely shaped driveway, comprised of long spans of concrete, needed control joints so we designed them to fit a scoring pattern that would lead people to the door of the elevator that was not intuitively placed with the elevation of the house.
We integrally colored the concrete charcoal so that we could seal the bands of the scoring pattern and then stain the driveway without sealer. That results in two kinds of dark grey but without acrylic sealer, which is less skid resistant when wet, over most of the driveway.