Investigation of the technological factors‘ influence on the formation of the repair compositions‘ properties

Abstract

Abstract Power transmission lines (PTL) belong to strategic facilities, on the reliability of which the life support of the country depends. Most of the currently operated PTLs were put into operation in the twentieth century, and now there is a problem of assessing their technical condition, repairing, if necessary, and maintaining them in working order. The defects appeared during the operation of PTL reinforced concrete elements have different localization and manifestation degree, but destruction of the concrete surface layer with reinforcement exposure is a characteristic, more often at the base of the PTL frame. The aim of the work is to select the optimal composition of the repair mortar based on non-shrinking and expanding cements, ensuring reliable adhesion of the repair mortar to the concrete of the structure, which will allow restoring the bearing and operational characteristics in the repaired PTL reinforced concrete elements at the design level.