With the installation of monolithic structures made of concrete of large areas - the foundation plate, concrete floor, paving paths, blind area, etc.p., The question arises of smoothing the surface and compaction of the concrete mixture. On small areas, of course, you can do with a manual tool, but when the volume of work reaches several hundred or even thousands of square meters, you can not do without vibration. On the STPMOSCOW website you can find out useful information on this issue.
