By Carmen Andrade (auth.), Carmen Andrade, Joost Gulikers (eds.)

In this e-book, a serious research is made on provider existence types relating to reinforcement corrosion. The participants are at the frontier of data within the box of sturdiness of bolstered concrete. issues coated within the ebook contain: reasons and mechanisms of decay, delivery mechanisms in concrete, numerical modeling of concrete habit, toughness modeling and prediction, reliability method of structural layout for sturdiness, structural habit following degradation of concrete buildings, deterioration and service of concrete buildings, and corrosion dimension techniques.

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Extra resources for Advances in Modeling Concrete Service Life: Proceedings of 4th International RILEM PhD Workshop held in Madrid, Spain, November19, 2010

Example text

From the slope obtained in each curve of accumulated corrosion, during the propagation period, the average steel section that is lost each year can be obtained (Figure 5). 2 Influence of concrete variables in marine environments The effects of the cover thickness, the use of inhibitors or galvanized steels can be studied from Figure 2 to Figure 5, and are as expeted. The beneficial effects of the addition of 2% NO2- in cement weight in the water mix, delay onset of corrosion and reduce the section loss to 10% after 20 years in a sea water environment.

Cem. Concr. , vol 30, 1517–1525. [15] Gallé, C. (2001). Cem. Concr. , vol. 31, p. 1467–1477. [16] Rilem recommendation TC 116-PCD (1999). Mater. , vol. 32, p. 174–179. , and Tanner, P. (2000). In: Proceedings of the 5th CANMET/ACI International Conference on Durability of Concrete, Supplementary papers, p. M. ), American Concrete Institute, Barcelona (Spain). [18] ASTM (1997). ” [19] Nordtest (1999). “NT Build 492. ” Espoo (Finland). Study of corrosion rate variability in indoor and outdoor specimens Filipe Pedrosa and Carmen Andrade Abstract Behavior, time evolution and variability of the corrosion process in reinforced concrete structures is an important factor to have in mind if structural service life is to be determined.

In the present paper, a series of hygrothermal and corrosion data obtained for indoor and outdoor reinforced concrete specimens are summarized by means of descriptive statistics. For a T-beam exposed to continental weather conditions, temperature, relative humidity, corrosion potential and corrosion current density measurements were taken since the year of 1993. The same measurements were made for an outdoor pile exposed to the same conditions. The indoor studied specimens are two small slabs exposed to lab conditions for which corrosion measurements were taken in the first 96 days period.

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