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Sorption of water in mortars and concrete
Results are presented of a study on the capillary transport of water in concretes and mortars as a function of water/cement ratio, sand size distribution, and curing. Our studies indicate that the sorption of water with respect to time in concrete exhibits complex scaling behavior. At early times, of the order of one hour, the t0.5 scaling of typical sorption theories is observed. At longer times, of the order of tens of days, a slow crossover regime is seen as the t0.5 scaling breaks down. At very long times, of order hundreds of days, a slower uptake which may be driven by the capillary forces in the smaller gel pores is found. Again a t0.5 scaling is observed but with a much smaller sorption rate. We describe an empirical fitting form for data in the different scaling regimes. Aspects of the experimental design including sample drying and exposure to air are discussed. Service life predictions from such measurements are discussed.
Sorption of water in mortars and concrete
Results are presented of a study on the capillary transport of water in concretes and mortars as a function of water/cement ratio, sand size distribution, and curing. Our studies indicate that the sorption of water with respect to time in concrete exhibits complex scaling behavior. At early times, of the order of one hour, the t0.5 scaling of typical sorption theories is observed. At longer times, of the order of tens of days, a slow crossover regime is seen as the t0.5 scaling breaks down. At very long times, of order hundreds of days, a slower uptake which may be driven by the capillary forces in the smaller gel pores is found. Again a t0.5 scaling is observed but with a much smaller sorption rate. We describe an empirical fitting form for data in the different scaling regimes. Aspects of the experimental design including sample drying and exposure to air are discussed. Service life predictions from such measurements are discussed.
Sorption of water in mortars and concrete
Sorption von Wasser in Mörtel und Beton
Martys, N.S. (author) / Ferraris, C.F. (author)
Materials for the New Millennium, Materials Engineering Conf, 4 ; 2 ; 1129-1138
1996
10 Seiten, 5 Bilder, 2 Tabellen, 12 Quellen
Conference paper
English
Mörtel , Adsorption , Wasser , Beton , Kapillarität , Wasser-Zement-Wert , Sand , Additiv , Korngrößenverteilung , Ansteifen (hydraulisch) , Dauer , Langzeitversuch
Sorption of Water in Mortars and Concrete
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| Online Contents | 2006
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