Issues

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2019

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vol. 17 /

Issue 4

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O. V. Sumariuk, V. F. Romankevych, I. I. Gutsulyak, V. V. Mykhailovych, Yu. T. Roman, I. M. Fodchuk
«Influence of a Microstructure of Fractures of Concrete on Strength of Concrete Composites of High Structural Strength and Density»
649–660 (2019)

PACS numbers: 61.05.cp, 62.20.mm, 62.25Mn, 68.37.Hk, 81.05.Mh, 81.40.Np, 83.80.Ab

A comparative microanalysis and elemental analysis of different areas of the breaks of concrete composites of various structural strength and density using the X-ray diffraction and the energy dispersion X-ray spectroscopy are carried out. The influence of ultrafine modifiers on the processes of structural formation of a cement stone is investigated. The character of the crack opening and the phase composition of fracture surface in the process of their destruction are analysed. As shown, the greater the dispersion of the phase components of calcite, the higher in them of aluminium atoms and the lower the concentration of silicon atoms that is a possible cause of reduction of structural strength of the composite at the nanoscale level.

Keywords: concrete composite, ultrafine modifiers, nanosilica, metakaolin, quartz powder, X-ray spectroscopy, SEM

https://doi.org/10.15407/nnn.17.04.649

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© NANOSISTEMI, NANOMATERIALI, NANOTEHNOLOGII G. V. Kurdyumov Institute for Metal Physics of the National Academy of Sciences of Ukraine, 2019
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