Frost Resistance and Corrosion Resistance of Heavy Concrete with a High Content of Enriched TPP Ash
I. Yu. Petrik, N. M. Zaichenko, V. N. Gubar
Donbas National Academy of Civil Engineering and Architecture
Annotation: The results of the study of frost resistance and corrosion resistance of normal weight cement concrete with high volume of beneficiated fly ash (50 % replacement of Portland cement) are presented. The use of beneficiated fly ash makes it possible to reduce the percentage of Portland cement, to modify the composition of hydration products of binder, to increase the density of the structure, and, as well, strength and durability of concrete. It has been established that the beneficiating process of fly ash by electrostatic separation provides getting the pozzolanic additive with low percentage of unburned carbon for a high level of Portland cement replacement in concrete. An increased frost resistance and corrosion resistance of concrete with a partial replacement of Portland cement by beneficiated fly ash is achieved by the adding of the air-entraining additive Sika® Aer Pro-100, which ensures the formation of small air pores evenly distributed throughout the volume of concrete. On the other hand, the ART-CONCRIT R superplasticizer compensates decreasing concrete strength as well as beneficiated fly ash provides the formation of low-basic calcium hydrosilicates in the structure of cement paste.
Keywords: concrete, fly ash, electrostatic separation, superplasticizer, air-entraining additive, corrosion resistance, frost resistance.
Pages: 225-234.
Link for citation: Petrik, I. Yu.; Zaichenko, N. M.; Gubar, V. N. Frost Resistance and Corrosion Resistance of Heavy Concrete with a High Content of Enriched TPP Ash. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2021. – Vol. 17, N 4. – Р. 225-234. – URL: https://donnasa.ru/publish_house/journals/spgs/2021-4/03_petrik_zaichenko_gubar.pdf (date of access: 16.09.2024). (in Russian)
Vol. 17, N 4 (2021)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture