This paper elucidates the mechanism of leaching on the mechanical properties and durability of concrete; summarizes the conventional leaching and accelerated leaching methods in the process of concrete leaching; analyzes the influence of water cement ratio, admixtures, and fibers on the compressive strength and tensile strength of concrete ...

The present report presents an experimental study of leaching of concrete caused by water percolating through the concrete, or by diffusion from concrete to external water in contact. An apparatus was designed and constructed in which de-ionised water could be forced, by external pressure, through a number of concrete specimens of differing ...

2021年2月22日 · This paper summarizes the leaching results of seven research projects for five different environmental parameters (Ba, Cr, Cu, Pb, V) considering fresh concrete and fresh cement suspensions in the specially designed tank test as well as the results of the subsequent leaching of the young hardening concrete [18], [19], [20], [21], [22], [23 ...

2019年6月22日 · The study showed how the deterioration of the concrete by leaching causes high corrosion rates and a drastic loss of the durability of the structures, which evidences the need to consider in the project, the effect of the leaching according to the class of exposure to extend the service life of reinforced concrete structures.

The leaching process when water attacks concrete, and the effect of leaching on the strength and durability of a concrete structure, is analysed theoretically. Technique for prediction of the future leaching

2016年8月26日 · This chapter presents the leaching process of structural concretes by soft water in the environment. Typical structure cases are first introduced to illustrate the impact of long-term leaching on structural performance and the related problems for concrete structures and facilities.

Leaching from hardened concrete could be of importance where concrete is in contact with drinking water and in normal structures where leaching could affect the environment. However, concrete is a dense, low-permeability material where movement of …

The detrimental crystallization of ettringite (AFt) preferentially occurs when concrete is exposed to water infiltrations and that the pH decreases due to the leaching of the (OH –) ions: the reaction is reversed as when temperature decreases.

2024年10月4日 · Effects of Leaching. Leaching of calcium from concrete increases porosity, decreases density and decreases the strength of concrete. A typical example of mass loss due to leaching in an accelerated test is shown in figure below (for source of these figures, see at the end of this article).

2016年8月1日 · The mechanism of concrete leaching is explained through the solid–liquid dissolution equilibrium in pores, and the main influential factors are analyzed comprehensively.