The appropriate consistency of concrete or mortar is decisive for the quality of many construction works. Most often we use those with a dense-plastic consistency. After mixing the concrete or mortar with water, check the consistency by taking a small part of it with your hand and squeezing it firmly. After opening the hand, the mortar that is too thin will gradually melt at the edges, too dense when you open your hand, it breaks into smaller pieces. A mortar ball with the correct consistency will not change its shape even after a long time.