Identification of Concrete Properties in Beam-Type Structures with Defects Based on Dynamic Methods

Abstract

The problem of concrete properties identification and damage location in model beam type constructions is considered on the basis of application of experimental vibration analysis. As a simple analysis model, beam structures are considered defect-free and with defects. Based on the experimental approach, the model vibrations under shock and vibration excitation are analyzed. On the basis of analytical modeling, the dynamic modulus of elasticity, the velocity of sound in the beam, and the location of the defect are calculated. A technique and an example of the location of a defect in beam type constructions are presented.

Repair compositions for restoration of operated reinforced concrete structures

“…The characteristic disadvantages of expanding cements based on alumina highaluminate components are largely overcome by using expanding composites based on Portland cement [5][6][7][8].…”

“…When developing expanding compositions based on Portland cement, the principle of compensated expansion was put forward and substantiated [4,5]. According to this principle, in such formulations, expansion occurs mainly due to the inclusion of a small amount of aluminum powder additive in the mixture.…”