About Maximum Admissible Content of Chlorides in Concrete
A brief review of regulating documents devoted to the maximum admissible content of chlorides in the concrete is presented. The calculation of chlorides quantity in the concrete at themaximum admissible content of chlorides in the initial materials is given. The calculation is made for two compositions of the concrete: with a low and high content of cement. It isshown that the critical content of chlorides, higher of which there is a danger of corrosion, depends on a large number of factors including the content of chlorides, mineralogical compositionof a clinker, content of alkalines, presence of mineral additives, water-cement ratio, conditions of concrete hardening. Due to the difficulty of determining the amount of freechlorides in the concrete, it is proposed to combine the determination of chlorides content with electro-chemical and corrosion tests of steel reinforcement in the concrete.