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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-2 of 2 Abstracts search results
March 1, 2000
Xiaobing Song and Xila Liu
Laboratory experiments were conducted to establish the quantitative relation between the cathode-to-anode area ratio and the degree of pore saturation (PS) in carbonated mortars. It is confirmed that a close link exists between the cathode-to-anode area ratio and the degree of PS. The influence of resistivity of mortar (concrete) is also studied. It is demonstrated that the resistance control to corrosion process is incorrect under the condition of the present experiment. It is proposed that the supplemental of oxygen influences the probabilities of a certain unit metallic surface area serving as cathodic or anodic area, and hence determines the cathode-to-anode area ratio. It is also proposed that when connecting bimetallic couples, there exists galvanic current, but anodic polarization may not necessarily take place.
May 1, 1991
Claudio Floris, Roberto Marelli, and Luigi Regondi
Concrete creep effects are studied from a statistical point of view. Some quantities that affect them are stochastic variables; thus, a stochastic analysis is necessary. The analysis is performed through Monte Carlo simulation. In this way the stochastic characteristic of some variables is easily taken into account. Stochastic variables are temperature and humidity of air, so monthly averages distributions are determined. In the analysis, random values for temperature and humidity are extracted every month; samples with 10,000 viscous stories are constructed and analyzed to find the probability density functions of the most important output quantities. The cases analyzed concern the redundant forces from coupling of cantilever beams, resulting in the loss of prestress in a prestressed section. The output quantities have bimodal-shaped histograms, not negligible dispersion and non-normal distributions.
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