Accession Number : AD0730049

Title :   The Heat Treatment of Concrete in an Electromagnetic Field,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Lykov,A. V. ; Romanovskii,S. G.

Report Date : 22 JUL 1971

Pagination or Media Count : 8

Abstract : The authors describe briefly a method and a technology developed for accelerated setting of concrete in an electromagnetic field, using commercial-frequency current. The heating of the concrete is produced by induction of the ferromagnetic elements contained in the reinforced and ordinary concrete, and also as a result of the fact that concrete constitues a relaxation-polarized system with respect to the electromagnetic field, so that heat transfer in the concrete occurs not only under the influence of temperature and concentration gradients, but also under the influence of magnetic and electric field gradients, and also under the influence of differences in the magnetic and electric field intensity vectors at the given instant of time and in the equilibrium state. The method permits a smooth control of the heating of the concrete by continuously regulating the magnetic field intensity. In addition, the external electromagnetic field, under definite conditions, affects directly also the hydrodynamics, heat and mass exchange, the rate of occurrence of the chemical reactions, structural-mechanical properties of the concrete.

Descriptors :   (*CONCRETE, AGING(MATERIALS)), ELECTROMAGNETIC FIELDS, HEAT TREATMENT, INDUCTION HEATING, USSR

Subject Categories : Construction Equipment, Materials & Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE