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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.
Title: Physico-Chemical Studies of Cement Pastes, Mortars, and Concretes Exposed to Sea Water
Author(s): M. Regourd
Publication: Special Publication
Appears on pages(s): 63-82
Keywords: blast furnace slag; cement pastes; concrete durability; C3A; electron microscopy; marine atmospheres; mortars (material); pernieability; pozzolan cements; sea water.
Abstract:In a marine environment the durability of permeable concrete is a function of the chemical resistance of the hydrated cement paste to sea water. Portland cements with various amounts of C3A, blast-furnace slag cements, and pozzolan cements were investigated. The test specimens were stored both in laboratory and natural sea water conditions. The sequence of chemical reactions between the hydrated components and the aggressive ions dissolved in sea water was followed by scanning electron microscopy, electron probe microanalysis and X-ray diffraction. It is concluded that as a result of diffusion of C1- and SO42- ions, degradation of Ca(OH)2 and C-S-H occurs due to the substitution of Mg2+ for Ca2+ and formation of secondary products such as CaS04.2H20, C3A.CaC12.10H20, C3A.3CaS04.32H20, and CaSiO3.CaS04.CaC03.15H20.
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