EXPERIMENTAL STUDY ON DETERIORATION OF POROUS CONCRETE AND ITS BINDER BY CaCl₂aq

Abstract

The purpose of this research is to clarify the durability of porous concrete against chemical deterioration by CaCl₂ solutions as a deicer. For various mix proportions of porous concrete and its cement paste, these specimens were soaked in high concentration of CaCl₂ solutions. Compression tests of porous concrete specimens, estimation of deteriorated depth of cement paste by drilling type surface strength tester, and observation of osmotic depth of chlorine element in cement paste by using EPMA have been conducted. As a result, to reduce water cement ratio or to use Portland blast-furnace slag cement has been found effective on a chemical deterioration.