[en] A diffusion theory with a linear or a nonlinear coefficient of diffusivity is insufficient for the characterization of the drying behavior of light-weight concrete slabs. A new mechanistic mathematical model, based on irreversible flow of heat and mass, is applied to study the effects of ambient humidity on moisture movement in concrete slabs. Implicit finite difference calculations for a light-weight concrete slab yield the global average drying rates under various values of ambient humidity, and yield the histories of the distributions of moisture in the slab. (orig.)
Source
Societe Francaise d'Energie Nucleaire (SFEN), 75 - Paris; Commission of the European Communities, Brussels (Belgium); 360 p; ISBN 0 444 86260 9; 
; 1981; vp; North-Holland Publishing Co; Amsterdam, Netherlands; 6. international conference on structural mechanics in reactor technology; Paris, France; 17 - 21 Aug 1981
; 1981; vp; North-Holland Publishing Co; Amsterdam, Netherlands; 6. international conference on structural mechanics in reactor technology; Paris, France; 17 - 21 Aug 1981
[en] A diffusion theory with a linear or a nonlinear coefficient of diffusivity is insufficient for the characterization of the drying behaviour of hydrated concrete slabs. A general mathematical model, based on nonequilibrium, irreversible flows of heat and mass, yields a set of nonlinear partial differential equations of parabolic type. Implicit finite difference calculations for a concrete slab yield moisture, temperature, and pressure histories as well as global average drying rates. Graphs show that during the pendular state of dessication, diffusion, capillary, and evaporation-condensation processes are the governing mechanisms in drying. (orig.)
Source
Jaeger, T.A.; Boley, B.A. (eds.); Commission of the European Communities, Brussels (Belgium); Bundesanstalt fuer Materialpruefung, Berlin (Germany, F.R.); International Association for Structural Mechanics in Reactor Technology; p. H1/6 (1-8); ISBN 0 444 85364 2; ; 1979; p. H1/6 (1-8); North-Holland Publishing Co; Amsterdam, Netherlands; 5. international conference on structural mechanics in reactor technology (SMIRT-5). 9. international seminar and 2. international seminar on structural reliability of mechanical components and subassemblies of nuclear power plants and 2. international seminar on containment of fast breeder reactors (CONFABRE-2); Berlin, Germany, F.R; 9 - 21 Aug 1979; INKA-CONF--79-321-284
; 1979; p. H1/6 (1-8); North-Holland Publishing Co; Amsterdam, Netherlands; 5. international conference on structural mechanics in reactor technology (SMIRT-5). 9. international seminar and 2. international seminar on structural reliability of mechanical components and subassemblies of nuclear power plants and 2. international seminar on containment of fast breeder reactors (CONFABRE-2); Berlin, Germany, F.R; 9 - 21 Aug 1979; INKA-CONF--79-321-284