The influence of technological factors of the device of concrete joint on the work of reinforced concrete structures

Currently, monolithic and precast-monolithic structures made of reinforced concrete are widely used. Due to the fact that the device of a sufficiently large number of concreting working seams is inevitable, it is still relevant to investigate the issue of ensuring reliable contact of concrete: newly laid (“new”) and concrete that has already gained a certain strength (“old”). The article presents the methodology and results of experimental studies on the influence of the working seam. It also studies the impact of the technological parameters of the device on the operation of structures under load. The purpose of the study was to test the technology of the working seams device using a concrete mixture on a slag binder with a modulus of basicity Mo equal to 1.33, sealed with an alkaline solution with a pH level above 12.0. The study also aimed to prove the effectiveness of this technological solution. The paper considers the problem of “forced” inclined concreting joints caused by a number of technological and organizational reasons. It justifies the use of slag-alkaline solutions and slag-alkaline concrete with the above parameters for the device of inclined joints in monolithic reinforced concrete structures and formulates the recommendations.