,

2.11)

cp

where P – porosity of compacting fresh concrete.

More than 90% of all concrete constructions and units are made by

method of vibration.

A.Desov and V.Shmigalsky had offered the parameter of

intensity of vibrations (I) as a criterion of efficiency of vibration

(fig.2.9):

І А2

=

W3

(2.12)