Journal ArticleDOI
Influence of transverse crack width on reinforcement corrosion initiation and propagation in mortar beams
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In this paper, the relationship between crack widths, chloride diffusivity, and corrosion rate of cracked mortar beams was discussed, and it was concluded that the effect of crack width on the corrosion initiation and propagation period was more pronou...Abstract:
This paper discusses the relationship between crack widths, chloride diffusivity, and corrosion rate of cracked mortar beams. Flexural loads are introduced to generate crack widths ranging from 29 to 390 µm. The specimens were subjected to accelerated corrosion by immersion in a 5% NaCl solution and a constant voltage of 12 V. In addition, salt ponding tests were conducted to determine the chloride ion transport properties. The results showed that as the crack width increased, the effective diffusion coefficient (corrosion initiation) and mass loss of steel reinforcing bars due to the accelerated corrosion (corrosion propagation) also increased. For crack widths less than about 135 µm, the effect of crack width on the effective diffusion coefficient and mass loss of steel reinforcing bars embedded in mortar specimens was found to be marginal when compared with the virgin specimens. Therefore, it was concluded that the effect of crack width on the corrosion initiation and propagation period was more pronou...read more
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Self-healing capability of cementitious composites incorporating different supplementary cementitious materials
TL;DR: In this paper, the authors studied the relationship among the applied mechanical deterioration in terms of splitting tensile deformation, curing conditions and chloride ion permeability of Engineered Cementitious Composites (ECCs) that contain different supplementary cementitious materials (SCMs).
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Modeling of the Influence of Transverse Cracking on Chloride Penetration into Concrete
TL;DR: In this paper, a preliminary strategy for examining the influence of transverse cracking on chloride ion penetration into concrete is presented, along with a graphical approach for adjusting the predicted service life provided by current models to reflect this influence.
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Self-healing performance of aged cementitious composites
TL;DR: In this paper, the authors investigated the self-healing performance of one-year-old engineered cementitious composites (ECC) with different mineral admixtures to understand whether selfhealing in late ages is similar to that of early ages.
Journal ArticleDOI
Influence of service loading and the resulting micro-cracks on chloride resistance of concrete
TL;DR: In this article, the effect of micro-cracks caused by loading on chloride transport into concrete was studied, and the results indicated that chloride migration coefficients changed little when the stress level was below 50% of the ultimate load.
Journal ArticleDOI
Effect of Cracking on Corrosion of Steel in Concrete
TL;DR: In this paper, the authors present a comprehensive review and summarised the results on the effect of cracking on corrosion of steel in concrete The effect of crack widths on the diffusion of chlorides ions and carbon-dioxide is also discussed in this paper Among all available results, a correlation between the corrosion current and the crack width up to 03mm can be established, however, no distinct trends are observed beyond that crack width.
References
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Book
The mathematics of diffusion
TL;DR: Though it incorporates much new material, this new edition preserves the general character of the book in providing a collection of solutions of the equations of diffusion and describing how these solutions may be obtained.
Book
Corrosion of steel in concrete
TL;DR: In this article, the authors present a research work that aims at mapping out the various mechanisms which control the process of steel corrosion in concrete, and illustrate how steel corrosion is illustrated.
Journal ArticleDOI
Water Permeability and Autogenous Healing of Cracks in Concrete
TL;DR: In this paper, the authors investigated the effect of self-healing in cracks on the functional reliability of structures subjected to water-pressure loads and showed that the formation of calcite in the crack is almost the sole cause for the autogenous healing.
Journal ArticleDOI
Permeability and self-healing of cracked concrete as a function of temperature and crack width
Hans-Wolf Reinhardt,Martin Jooss +1 more
TL;DR: In this article, a high-strength concrete is tested on a high strength concrete to establish the permeability and self-healing behavior of cracked concrete as a function of temperature between 20 and 80 °C and crack width between 0.05 and 0.20 mm.
Control of cracking in concrete structures
TL;DR: In this article, the authors present a report on the causes of crackings in CONCRETE, including shrinkage, re-inforcement, and long-term effects such as CREEP, REINFORCE, and CONSTRUCTION.