Abstract
The article presents the results of studies of the strength characteristics of ring-shaped concrete products made by vibropressing and radial pressing methods. Fragments with a length of 1000 mm were cut out of concrete pressure-free pipes, which were subsequently tested with a three-line load. The axial tensile strength of radially pressed concrete is in the range of 4,55–6,07 MPa, similar results were obtained when testing samples-beams sawn from destroyed fragments of 4,97–5,57 MPa. At the same time, the values of axial tensile strength determined by the test results of control samples-prisms 100×100×400 mm according do not exceed 3,63 MPa.
 The study of the strength characteristics of vibropressed concrete was carried out on the ring of a wall well with a diameter of 1000 mm. Also, studies of the strength of vibro-pressed concrete for axial tension were carried out based on the results of testing samples-beams made from fragments of the destroyed ring and the strength of concrete samples-prisms 100×100×400 mm. The test results showed that the deviation of the strength of vibrocompressed concrete in axial tension is not less than 27,6% higher than the strength determined when testing control samples-prisms of 2,75 MPa.
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