In-service performance of hybrid geopolymer binders based class F fly ash

3rd International Scientific and Technical Conference “Energy Systems”

Kozhukhova, N.I.^1 ; Teslya, A Yu^1 ; Kozhukhova, M.I.^2 ; Zhernovsky, I.V.^1 ; Yermak, S.N.^1 ; Ogurtsova, Yu N^1

Department of Materials and Materials Technology, Belgorod State Technological University of V.G. Shukhov, Kostyukov St.46, Belgorod

308012, Russia^1

Department of Civil Engineering and the Environment, University of Wisconsin-Milwaukee, P.O. Box 784, Milwaukee

WI

53201, United States^2

关键词: Bench-scale testing;    Class f fly ashes;    Construction process;    Geopolymer binders;    Mechanical performance;    Service performance;    Strength development;    Water-resistances;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/552/1/012035/pdf
DOI  :  10.1088/1757-899X/552/1/012035

来源: IOP

【 摘 要 】

Production of high-performance construction materials, meeting the requirements of construction process when development of up-To-date buildings and structures is very relevant and requires the usage of effective polycomponent binding systems, including geopolymers This work studied mechanical performance, as well as strength, water absorption and water resistance of portland cement-Class F fly ash-NaOH hybrid geopolymer binding system. The bench scale testing was conducted on different mixes, including regular portland cement-based and Class F fly ash-NaOH geopolymer binders used as reference compositions. The developed hybrid binders demonstrated, that incorporation of portland cement up to 40% as a modifying agent, reduces the formation of water soluble mineral phases such as sodium carbonates and hydroxycarbonates in low reactive class F fly ash geopolymer binders. It was found, that the presence of portland cement in the system positively affects strength development and noticeably reduces water absorption and improves water resistance of the developed binders, which is related to formation of water resistant and stable calcium hydrosilicate phases (C-S-H)