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Microscopic observations of self‐healing products in calcareous fly ash mortars
Author(s) -
JóźwiakNiedźwiedzka Daria
Publication year - 2015
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.22440
Subject(s) - fly ash , scanning electron microscope , microstructure , materials science , environmental scanning electron microscope , mortar , composite material , cement , optical microscope , calcareous , curing (chemistry) , metallurgy , geology , paleontology
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 . © 2014 Wiley Periodicals, Inc.