Simulation of Chloride Migration in Compression-Induced Damage in Concrete

Recent durability studies on concrete structure

“…M. K. Rahman et al studied the impact of compressive stress-induced damage on chloride transport in concrete [14]. They found that there was a significant increase by up to three times in the effective chloride-migration coefficient due to the damage in concrete.…”

“…As noted by researchers, in most cases, the degradation of a concrete structure is a result of the combined effect of multi environmental factors and loading. Therefore, many researchers have extended their work from a single mechanical loading or environmental factor to the combined effects of multiple factors [3][4][5][6][7][8][9][10][11][12][13][14]. As a result of durability studies, many countries have proposed durability-based design guidelines [15][16][17] or durability-loading carrying ability unified service life design method [2].…”

Modelling Chloride Diffusion in Concrete With Influence of Concrete Stress State

“…With respect to Eqn (8), the equations of stress influence coefficient can be obtained if the chloride diffusion coefficients at given concrete stress state and zero-stress state are known. To conduct numerical analysis, it is assumed that K ks has no coupling with other factors such as e m m m t m m m m m m m m m r r e a a r r e a a r r e a a r r e a a C C kt x time and water/cement ratio of concrete (corresponding assumptions are also contained in vast literature, such as Gowripalan et al 2000;Wang et al 2011;Rahman et al 2012). In other words, K ks is only a function of the concrete stress ratio δ (δ = σ c(t) / f c(t) ).…”

Durability of concrete under combined mechanical load and environmental actions: a review

“…h) Combination of mechanical load, freeze-thaw cycles and chloride penetration [23] i) Combined effect of mechanical load and environmental actions [31] j) Combination of mechanical load and carbonation [30] Chloride penetration and compression 0.3, 0.5, 0.7 Diffusion coefficient increased when the stress level was higher than 50% of compressive strength [25] Chloride penetration and compression 0.4, 0.75, 0.9 Diffusion coefficient as determined at a stress level of 90% was three times larger than that of unloaded specimens [32] Chloride penetration and compression 0.2, 0.35, 0.5 The apparent chloride diffusion coefficient decreased with the increase of stress level if the stress level remained below 0.5 [33] Tension and compression 0.3, 0.5 Chloride content was the highest in concrete stressed under tension and lowest in concrete under compression [34] Carbonation under compression A critical value was observed; above this value compression increased the rate of carbonation [35] Water absorption under tension 0.6, 0.8, 0.9 Water absorption was insensitive below a load level less than 90% [4] Bending, frost action, and chloride penetration 0.1, 0.25, 0.5 The higher the stress ratio was, the faster the DME dropped [23] Bending and chemical reaction 0.1,0.2,0.3,0.4,0.5 Reduction in flexural strength [36] Bending and frost action 0.1, 0.25, 0.5 External stress influenced the deterioration rate [22] Bending, frost action, and chloride penetration 0.3, 0.4 The higher the stress ratio was, the higher the risk of steel corrosion was Journal of Sustainable Cement-Based Materials 9…”