Comparison of Phase Analysis Methods for Cement-Based Repair Materials Based on BSE Images
ZHANG Gaowang
LÜ Jiangpeng
CHEN Zexin
YUAN Jie
YANG Xiaogang
Abstract：Based on backscattered electron(BSE)images,the performances of the frequency-grayscale histogram method,cumulative frequency-grayscale histogram method,and Gaussian mixture model(GMM)method in phase analysis of cement-based repair materials(CRM)were compared,and phase proportion in the repaired interfacial transition zones were studied based on the method with the optimal performance.The results indicate that the GMM method exhibits the best stability and consistency and is recommended for use in grayscale threshold segmentation for quantitative phase analysis.The pores and unreacted particles are densely distributed in repaired interfacial transition zones,with a higher content of unreacted particles in modified Portland cement-based repair materials and a greater proportion of pores in phosphate cement-based repair materials,so the appropriate treatment should be applied in repair work to enhance the effectiveness of the repair.
Keywords：cement-based repair materialbackscattered electron imagerepaired interfacial transition zonegrayscale segmentation thresholdphase proportion
Publication Date：2025-08-30
Online Publishing Date：2025-09-05(First online date of this platform, not the publication date of the document)
Pages：9( 816-824 )