Journal
MICROSCOPY RESEARCH AND TECHNIQUE
Volume 78, Issue 1, Pages 22-29Publisher
WILEY
DOI: 10.1002/jemt.22440
Keywords
self-healing; cement matrix; stereomicroscope; SEM; EDX analysis
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Funding
- Project Innovative cement binders and concretes with addition of high calcium fly ash (Polish Ministry of Science and Higher Education) [POIG.01.01.02-24-005/09]
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The results of microstructural characterization of mortars containing fly ash class C (High Calcium Fly Ash) from combustion of lignite are presented. The evaluation of the microstructure was performed using scanning electron microscope, optical, and confocal microscope. The tested beams were bent till the crack and microcracks opening, which were healed during the different curing time. The results showed that the replacement of cement with fly ash class C influenced the process of crack healing. The addition of HCFA, at both 30% and 60%, speeds up the self-healing process in cracks and particularly in micro-cracks. In the research, the completely filling up of the cracks by new phases has not been observed, only the beginning of such process has been noticed. Microsc. Res. Tech., 78:22-29, 2015. (c) 2014 Wiley Periodicals, Inc.
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