How to make a concrete site with your own hands: what to take into account

In almost every house or in the country there is a concrete terrace, which eventually gains an unpleasant appearance and requires restoration. To do this, it is necessary to properly prepare a place for the site. First you deepen the place by 10 centimeters, then fall asleep with gravel and compact it. This is necessary so that in the future the terrace does not burst and does not sag.