STUDY ON QUANTITATIVE EVALUATION OF STRENGTH AND MATERIAL PERMEABILITY IN MINUTE REGIONS IN CONCRETE

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1)THE FOLLOWING QUANTITATIVE EVALUATION METHODS FOR STRENGTH AND MATERIALS PERMEABILITY OF MINUTE REGIONS IN CONCRETE COULD BE DEVELOPED IN THIS RESEARCH.A)MINUTE COMPRESSIVE TESTB)MINUTE TENSILE TESTC)MINUTE DIFFUSION TEST2)IT WAS QUANTITATIVELY CONFIRMED THAT THE STRENGTH AND MATERIALS PERMEABILITY OF AGGREGATE GAVE LARGE INFLUENCE ON THAT OF CONCRETE. MOREOVER THE EFFECTIVE METHOD TO USE THE LOW QUALITY AGGREGATES COULD BE PROPOSED.3)IT WAS QUANTITATIVELY CONFIRMED THAT THE UPPER PART OF CONCRETE WAS EASILY INFLUENCED BY BLEEDING AND THE QUALITY OF STRENGTH AND MATERIALS PERMEABILITY OF UPPER PART CONCRETE BECAME LOW. MOREOVER THE CORROSION FORMATION OF STEEL BAR EMBEDDED IN CONCRETE AFFECTED BY BLEEDING TENDED TO MACROCELL CORROSION DEW TO THE ABOVE EFFECT.4)IT WAS QUANTITATIVELY CONFIRMED THAT THE STRENGTH OF ITZ AT LOWER PART OF AGGREGATE WAS LOWER THAN THAT OF UPPER PART OF AGGREGATE DEW TO THE BLEEDING WATER.5)IT WAS QUANTITATIVELY CONFIRMED THAT THE CHLORIDE ION DIFFUSIVITY OF MINUTE REGION IN CONCRETE BECAME LARGE WITH TEMPERATURE RISING. MOREOVER THE ABOVE TENDENCY FOLLOWS ARRHENIUS EQUATION.