Abstract
The paper presents results on strength development and durability of 35 and 50 MPa total lightweight and 50 MPa normal weight concretes exposed to hot marine exposure conditions for a period of two years. An initial water curing of 7 days and subsequent seaside exposure is more beneficial for the strength development of light-weight concrete than it is for normal weight concrete. One day initial curing and subsequent seaside exposure was not very conductive for the strength development of both lightweight and normal weight concretes. The water penetrability of total lightweight concretes was found higher than the normal weight concrete under all the initial curing conditions and on subsequent exposure to the hot-marine environment. In the same vein, the depth of carbonation for the total lightweight concretes was more than that of the normal weght concrete. On the overall, the results suggest that the higher the water penetrability of a given concrete, the more is the penetration of the damaging species like carbon dioxide, sulphate and chloride ions into a concrete.
Résumé
Cet article présente les résultats concernant le dévelopment de la résistance et la durabilité de béton léger de 35 à 50 MPa, et d'un béton classique de 50 MPa, tous exposés à l'eau de mer chaude pendant deux ans. Une cure initiale du béton pendant sept jours, suivie d'une exposition en bord de mer sont plus favorables au développement des résistances des bétons légers qu'à celui du béton classique. Un seul jour de cure suivi d'une exposition marine n'est pas favorable au développement des résistances, pour les bétons légers ou classiques.
Le degré de pénétration de l'eau dans le béton léger est supérieur à celui du béton classique, quelle que soit la cure initiale et l'exposition marine ultérieure.
De même, la profondeur de carbonatation du béton léger est supérieure à celle du béton classique.
Les résultats obtenus soulignent la corrélation directe entre le niveau de pénétration de l'eau dans le béton, et la pénétration d'éléments nocifs comme le dioxyde de carbone, les sulfates et les chlorures.
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Haque, N., Al-Khaiat, H. Strength and durability of lightweight concrete in hot marine exposure conditions. Mat. Struct. 32, 533–538 (1999). https://doi.org/10.1007/BF02481638
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DOI: https://doi.org/10.1007/BF02481638