Alkaline Binders and Concretes Based on Ashes and Slags of TPP
Abstract: The compositions and properties of alkaline cements and concretes from ash and slag waste of thermal power plants (TPP) have been studied. The results of a comparative study of the dependence of the activity of alkaline binders on the type of ash and slag waste, the concentration of the alkali solution and the duration of hardening under normal conditions, during steaming and autoclaving are presented. It was found that during hardening under normal conditions, the activity of binders is insignificant and amounts to 2.5…12 MPa. With heat and moisture treatment, especially autoclave treatment, it increases significantly. The activity of alkaline binders based on TPP slags is 1.5–2.0 times higher than the activity of similar compounds based on fly ash. On the basis of the developed binders, steamed and autoclaved concretes of grades 100-200 and 300-400, respectively, can be obtained. The study of the hydrophysical properties of concrete (shrinkage, swelling during water saturation, kinetics of water absorption, capillary suction and frost resistance) was carried out.
Keywords: alkaline concretes, steaming, autoclaving, strength, shrinkage, swelling during water saturation, water absorption, capillary suction.
Pages: 89-97.
For citation: Bukina, D. Yu.; Zaichenko, N. M. Alkaline Binders and Concretes Based on Ashes and Slags of TPP. – Text : electronic. – In: Proceeding of the Donbas National Academy of Civil Engineering and Architecture. – 2023. – Issue 2023-1(159) Modern building materials. – Р. 89-97. – URL: https://donnasa.ru/publish_house/journals/vestnik/2023/2023-1(159)/st_12_bukina_zaichenko.pdf (date of access: 19.11.2024). – ISSN 2519-2817.
Issue 2023-1 (159)
Journal: Proceeding of the Donbas National Academy of Civil Engineering and Architecture
Publish house: Donbas National Academy of Civil Engineering and Architecture
Journal: Proceeding of the Donbas National Academy of Civil Engineering and Architecture
Publish house: Donbas National Academy of Civil Engineering and Architecture