Chloride Penetration Resistance of Concrete Structures under Compressive Load

Abstract

The mechanism of concrete durability under uniaxial compressive load has been studied through chloride penetration experiments in this contribution. It has been found that there is a good corresponding relationship between chloride penetration resistance of concrete and the applied compressive stress level. With increasing of the applied compressive load, chloride penetration depth and content both decreased firstly. After the compressive load up to a critical level, they began to increase quickly. The apparent diffusion coefficient and chloride concentration at the surface also increase with the same rule. It is shown that chloride penetration of concrete is a complex process. So the effect of mechanical load should be considered as an important factor for prediction of service life of reinforced concrete structures in marine environment.

Chloride Penetration in Surface-Treated Concrete in Natural and Accelerated Environments

“…Therefore, the major reason is the loading. The seepage flow of liquid in concrete is in direct proportion to the first power of porosity and the fourth power of the pore diameter for a given pore size (Jiang et al, 2012). The column is under compressive loads, which could reduce the amount of pores, change the distribution of concrete pore diameter, and reduce microporous average diameter, which result in the reducing of the water transport capacity and chloride transport capacity of concrete (Wu et al, 2016).…”

“…Chloride penetration under the uniaxial compressive loads, tensile loads, and the cyclic flexural loads has been studied by Jiang, Wang, Zhao, and Liu (2012), Wu, Li, Wang, and Liu (2016), and Xin (2010) under wetting and drying cycles, and the results show that the compressive loads could promote the chloride penetration resistance, while the tensile loads is on the contrary. Based on Fick's second law, a model of chloride penetration considering the compressive loads has been proposed by Wu et al (2016).…”