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- W141294443 abstract "A study of permeability by means of the AASHTO T 271-831, Rapid Determination of the Chloride Permeability of Concrete, was made on ten concrete mixes differing in cementitious material (w/c from 0.31 to 0.36, 16.5 weeks and 36 weeks old). The mixes included one, two and three powder mixtures of either low alkali sulphate resistant Portland cement or rapid hardening Portland cement with and without silica fume and fly ash. The repeatability, expressed as the coefficient of variation within specimens from the same mix varied from 5% to 18%. For unblended cements a linear correlation between electrical charge passed (coulomb) and porosity was found. For blended cements with either fly ash, silica fume or both much lower values of coulomb without a similar change in the amount of porosity were obtained. The measurements of electrical charge passed correlate well with resistivity measurements, especially for dense concretes. The increase in electrical current passed during the six hour long test period experienced for porous concretes tested according to the AASHTO T 277 - 831 method is a temperature effect. (Author/TRRL)" @default.
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- W141294443 date "1991-01-01" @default.
- W141294443 modified "2023-09-27" @default.
- W141294443 title "ASSESSMENT OF RAPID CHLORIDE PERMEABILITY TEST OF CONCRETE WITH AND WITHOUT MINERAL ADMIXTURES . DURABILITY OF BUILDING MATERIALS AND COMPONENTS. PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE HELD IN BRIGHTON, NOVEMBER 7-9, 1990" @default.
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