QUANTIFICATION OF CONCRETE DEGRADATION AND EVALUATION OF FREEZE-THAW RESISTANCE USING X-RAY TECHNIQUE WITH CONTRAST MEDIUM

Abstract

The purpose of this study is to develop a method for quantification of concrete degradation and evaluation of freeze-thaw resistance using X-ray technique with contrast medium. Firstly, the X-ray technique with contrast medium was carried out for AE concrete specimens in which fine cracks had occurred by a freezing and thawing action. Detection of fine cracks in this AE concrete specimens and the quantification of the concrete degradation was carried out. Next, the same method was carried out for specimens of mortar, Non-AE concrete and AE concrete, to examine the relationship between the radioparency dosage and the resistance to freezing and thawing. In addition, this method was carried out for the structure to quantify the concrete degradation and to evaluate the freeze-thaw resistance.