Application of Industrial CT to Identify Mixed Steel Slag Particles in Concrete
Industrial computed tomography(CT)was used to perform 3D scanning of steel slag particles and natural gravel in concrete,and their morphological differences were obtained.Steel slag particles were mixed into concrete in volume fraction of 3%,6%and 9%and industrial CT scanning was used to determine morphological characteristics of concrete specimens containing varying proportions of steel slag particles.Based on the image similarity method,the gray range of steel slag was obtained,and the image was binarized to calculate the content of steel slag particles.The results show that the calculated results are found to be relatively close to the actual steel slag particles volume fraction added,with an error range of less than±10%of the actual value,indicating high accuracy.Finally,industrial CT,X-ray fluorescence spectroscopy(XRF)and other testing methods were used to scientifically analyze the causes of concrete appearance quality accidents caused by steel slag particles in an actual project.
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