Apparent activation energy and strengthening during hardening of cement-concrete compositions

Abstract

Notion of “activation energy of structure formation” of the cement-concrete compositions has been introduced and substantiated. Methods of its definition have been developed based upon the results of direct electrical resistivity’s measurements in the process of concrete hardening. Apparent activation energy of structure formation is being defined by common laws of evolution of the structural-moisture state of the hardening cement-concrete compositions. Excursions of the activation energy of structure formation during hardening strictly correspond to the regularities of concrete strengthening: correlation coefficients of the “Strength – Activation energy” linear dependences for diverse types of concrete are close to 1. Notions of specific energy and energy efficiency of strengthening during hardening of the cement-concrete compositions have been introduced and substantiated.