Effective ways to reduce leaching and formation of efflorescence on structures

V S Rudnov,V A Belyakov

doi:10.1088/1757-899x/687/2/022025

V S Rudnov, V A Belyakov

Open Access

https://doi.org/10.1088/1757-899x/687/2/022025

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Abstract

Corrosion of the first kind (leaching) is the process of dissolution and removal to the surface of the structure of calcium hydroxide salts mainly under the action of a constant diffuse flow of water through a multi – level porous structure of the concrete composite. Technological methods to prevent the formation and reduction of efflorescence (leaching) when used in practice, improve durability of building structures and reduce operating costs. The paper explores the possibility of reduction or complete elimination of efflorescence on the surface of building structures due to the impact on calcium hydroxide in the composition of the Portland cement.

Highlights

In the modern world high requirements are imposed to the erected building structures of buildings and constructions on stability and reliability to various types of external aggressive influences of environment, but, in particular, and to durability at operation at atmospheric influences [1,2]
The paper explores the possibility of reduction or complete elimination of efflorescence on the surface of building structures due to the impact on calcium hydroxide in the composition of the Portland cement
As a result of the influence of mass transfer through building materials, salt crystals are formed on their surface, and building structures of these materials change their performance characteristics

Summary

Introduction

In the modern world high requirements are imposed to the erected building structures of buildings and constructions on stability and reliability to various types of external aggressive influences of environment, but, in particular, and to durability at operation at atmospheric influences [1,2]. As a result of the influence of mass transfer through building materials, salt crystals are formed on their surface, and building structures of these materials change their performance characteristics. The development of effective methods to counter these phenomena, which are engaged in the Department of materials Science in construction at Institute of new materials and technologies of Ural Federal University, is impossible without studying the mechanism of physical and chemical processes occurring in the concrete composite. The mechanisms of the process of salinization are revealed

Results and discussion

Published under licence by IOP Publishing Ltd

Conclusion