Selection of the optimal value of compressive stress in concrete under adverse external impacts

Anatoliy Goncharov,P Akimov,A Tusnin,A Doroshenko,N Vatin

doi:10.1051/e3sconf/202126302038

Abstract

This article reviews the effect of static and dynamic compressive stresses on the durability of reinforced concrete structures in aggressive environments. Based on the analysis of previous work and research on this issue, the author describes the main activities to be implemented in the course of works to ensure the durability of concrete and safety of reinforcement. He outlines the necessary measures to reduce the magnitude of dynamic stresses in pile driving and to ensure the healing of microdamage incurred therein. It is proved in the article that the implementation of the proposed set of measures will allow using reinforced concrete piles as supporting structures of quays in harsh climatic conditions.

Highlights

Research on durability of loaded concrete over the past 50 years [1,2,3] has convincingly proved that compressive stresses acting in concrete during the entire period of operation of a structure have a significant impact on the durability of concrete and the safety of reinforcement in adverse effects of the environment
Previous studies [2] showed that the effect of stress state on concrete freeze-thaw resistance depended on the initial concrete structure, in particular, on the presence of special additives that change the pore structure
To check whether these additives influence the rate of reinforcement corrosion in loaded concrete, additional studies were carried out according to the above method. 3 sample batches were simultaneously tested

Summary

Introduction

Research on durability of loaded concrete over the past 50 years [1,2,3] has convincingly proved that compressive stresses acting in concrete during the entire period of operation of a structure have a significant impact on the durability of concrete and the safety of reinforcement in adverse effects of the environment. In the variable water level zone in the Barents Sea (fluctuation amplitude ± 2 m twice a day) concrete berthing structures annually experience more than 300 cycles of alternate freezing and thawing with saturation with sea water. This fact still prevents the use of reinforced concrete piles in the construction of quays. He determined the microcracking boundary R°t under compressive stresses for various types of concrete

Methods

Results

Conclusion