Based on the existing limited test data, it is possible to set up an approximate constitutive model for creep and shrinkage at temperatures above 100 degree C, up to about 400 degree C. The model presented describes the effect of various constant temperatures on the creep rate and the rate of aging, similar effects of the specific water content, the creep increases caused by simultaneous changes in moisture content, the thermal volume changes as well as the volume changes caused by changes in moisture content (drying shrinkage or thermal shrinkage), and the effect of pore pressure produced by heating. Generalizations to time-variable stresses and multiaxial stresses are also given. The model should allow more realistic analysis of nuclear reactor safety, of fire resistance, and of vessels for coal gasification or liquefaction.
|Translated title of the contribution||Creep and Thermal Shrinkage of Concrete at High Temperature.|
|Title of host publication||Corso di Perfezionamento per le Costr in Cem Armato Fratelli Pesenti|
|Publisher||Italcementi SpA-Bergamo Editrice (Politec di Milano Stud e Ric n 4 1982)|
|Number of pages||25|
|State||Published - Dec 1 1983|
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