Porosity characterization of ITZ in cementitious composites: Concentric expansion and overflow criterion
作者： Yun Gao , Geert De Schutter , Guang Ye , Haoliang Huang , Zhijun Tan
DOI: 10.1016/J.CONBUILDMAT.2012.09.047
关键词:
摘要: The interfacial transition zone (ITZ) needs to be assessed since its excess of porosity could bring a negative impact on the overall material behavior. An intention current research is investigate characteristics ITZ in hardened Portland cement-based composites, by means backscattered electron–scanning electron microscope (BSE–SEM). Emphasis laid presenting an elaborative illustration image analysis with regard characteristic. Specifically, new method named ‘concentric expansion’ proposed process strip delineation for analyzing profile from aggregate surface. overflow criterion employed determine upper threshold pore segmentation. Such procedure was applied two kinds mortars 10% and 50% sand volume fractions. Image results indicated that typical took place vicinity designed mortars, which considered as sign conventional cementitious composites. Furthermore, average level (36.32%) mortar content higher than value (21.37%) content. discrepancy came varied effective water binder ratio air
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