By E. Poulsen, L. Mejlbro
This ebook is the main accomplished and versatile thought of chloride ingress in concrete to this point. according to attempt effects and box observations, the publication demonstrates the straightforward program of this thought to perform.
The info is gifted in a transparent type with every one bankruptcy containing an creation, technical functions and examples, and a last part masking the maths in the back of the speculation, to allow the reader to procure a deeper perception into the topic.
Primarily geared toward working towards engineers engaged in research and layout of concrete buildings uncovered to a chloride encumbered setting, this e-book can also be an invaluable reference for mathematicians and engineering scholars.
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Additional resources for Diffusion of chloride in concrete : theory and application
1995). However, the two to ﬁve years observations for concrete specimens at Tr¨asl¨ ovsl¨age Marine Exposure Station do not show this phenomenon. In the case of an existing marine structure, it is recommended to choose the 1-year values of the parameters, cf. 78). As a proper date for the later observation one can choose to carry out an inspection in such a way that it is possible to obtain several chloride proﬁles of the concrete in question. The achieved chloride diﬀusion coeﬃcient and the achieved chloride content of the concrete surface can be determined from the observed chloride proﬁles by nonlinear regression analysis.
At present this can be achieved by • The binder of the concrete should be composed of Portland cement, silica fume and ﬂy ash. CHAPTER 1. 32 INTRODUCTION AND READER’S GUIDE • The equivalent water/cement-ratio must be suﬃciently low. • The compaction of the concrete shall be appropriate. • The curing condition must ensure a high degree of hydration. Structural design and design of rebar cover The geometry of the structure has a signiﬁcant inﬂuence on the rate of chloride ingress into concrete. Horizontal concrete surfaces ought to be avoided.
Therefore, the location of the corrosion is called an anode. In order to stay neutral the reinforcement also creates cathodes. ) is responsible for corrosion of the reinforcement. When repairing the corrosion zone the former anodic zone may be in a better condition than the former cathodic zone. This may change the situation so that the former cathodic zone becomes an anode and the former anodic zone turns into a cathodic zone. In other words, the steel reinforcement around the repair starts to corrode.
Diffusion of chloride in concrete : theory and application by E. Poulsen, L. Mejlbro