DURABLE CONCRETE TECHNOLOGY FOR SEAPORT AND TRANSPORT FACILITIES IN FROSTY ENVIRONMENTS

Abstract

Despite the fact that in principle the problem of durability of concrete for marine and transport structures in harsh climatic conditions has been solved, cases of premature destruction of structures are observed at the present time. The results of field surveys show that the destruction of concrete in structures can be both local and global. It is established that if the properties of concrete correspond to external influences, the maintenance-free service life can be at least 100 years. Examples of the construction and operation of seaport facilities on Sakhalin are a confirmation of this. The study of the mechanisms of freezing and destruction of concrete under frost exposure, taking into account the real indicators of the quality of concrete, showed that there are significant reserves in concrete technology that can be used to increase the durability of concrete without resorting to its complication. However, in the conditions of the construction site, these reserves are not properly realized due to objective and subjective reasons. Therefore, the main goal of durable concrete technology is to organize the manufacture of structures with concrete quality indicators that meet the design indicators in the conditions of the construction site.