| Issue |
MATEC Web Conf.
Volume 315, 2020
International Scientific Practical Conference “Materials science, shape-generating technologies and equipment 2020” (ICMSSTE 2020)
|
|
|---|---|---|
| Article Number | 07006 | |
| Number of page(s) | 10 | |
| Section | Building Materials, Properties, Technologies, Equipment | |
| DOI | https://doi.org/10.1051/matecconf/202031507006 | |
| Published online | 01 July 2020 | |
Beneficiated ponded fly ash for concretes with high volume mineral additions
Donbas National Academy of Civil Engineering and Architecture, 286123 Makeyevka, Ukraine
* Corresponding author: zaichenko_nikola@mail.ru
The article presents the investigation results of effect of beneficiated ponded fly ash on the properties of cement pastes and concretes with high-level replacement of Portland cement. To improve the characteristics of ponded fly ash meeting technical requirements for replacing cement in concrete the triboelectrostatic beneficiation technology has been elaborated. This technology can produce low-carbon ash product (LOI = 2.52 % in this study) for the high replacing level of cement (45 %) in concretes. The beneficiated ponded fly ash has an improved granulometric and phase composition, a decreased content of unburned carbon that accelerates the hydration process of cement, increases the rheological properties of cement paste and the ability of air-entraining admixture to hold the required involved air. In a combination with the nanostructured-carbon-based plasticizing admixture the beneficiated ponded fly ash exhibits high rate of strength increase when is used in high-volume fly ash concretes.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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