Showing papers by "Marc-André Bérubé published in 2003"

TL;DR: In this paper, a concrete prism test for expansion because of alkali-aggregate reaction (AAR) was performed and the alkali concentration of both the concrete pore solution expressed under high pressure and the water below specimens in storage pails (bottom water) was measured.

TL;DR: In this paper, high and low-alkali cements were used to make concrete cylinders, 255 mm in diameter, with a highly alkali-silica-reactive coarse aggregate, and subjected to various conditions at 38 � C: immersion in 3% NaCl solution; immersion in 6% NaC solution; humidity at 100% RH; and 14-day cycles including 12 days in humid air, 2 days of drying, and 3 h in 6%.

TL;DR: In this article, the pore solution of half-specimens was extracted by high-pressure squeezing and compared with the composition results of the first extraction, and the results obtained from this investigation confirmed that a certain part of the alkali ions in pore solutions that had become fixed by drying are not subsequently extracted after rewetting.

TL;DR: In this paper, a high-alkali (HA) and a low-alkaline (LA) cement were used in order to evaluate the cement chemical composition on the expansion and on the chemistry of the pore water.