TY - JOUR
T1 - On the hydration of Belite-Ye'elimite-Ferrite (BYF) cement pastes
T2 - Effect of the water-to-cement ratio and presence of fly ash
AU - Koga, Guilherme Yuuki
AU - Albert, Blandine
AU - Nogueira, Ricardo Pereira
N1 - Funding Information:
The authors gratefully acknowledge the financial support of the Brazilian institution CNPq (grant number 229886/2013-2), of the French institution ANRT (grant number 2013/1440), and of the LafargeHolcim group. RPN acknowledge Brazilian FAPESP (process 2019/02136-3) foundation for his Visiting Researcher fellowship under process 2019/02136-3.
Funding Information:
The authors gratefully acknowledge the financial support of the Brazilian institution CNPq (grant number 229886/2013-2 ), of the French institution ANRT (grant number 2013/1440 ), and of the LafargeHolcim group. RPN acknowledge Brazilian FAPESP (process 2019/02136-3 ) foundation for his Visiting Researcher fellowship under process 2019/02136-3.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/11
Y1 - 2020/11
N2 - This work reports the evolution of the phase assemblage, pore solution, porosity, and mechanical resistance of Belite-Ye'elimite-Ferrite (BYF) cement pastes. Different water-to-cement (w/c) ratios were considered and the addition of fly ash (FA) evaluated. The initial 1-day hydration of BYF cement paste was characterized by the ye'elimite hydration accompanied by a pronounced alkalinity increase controlled mainly by the molar ratio of calcium sulfate to ye'elimite. Throughout the 1-year test, the phase assemblages of 0.50 and 0.67 w/c samples were similar, composed of ettringite, AFm, strätlingite, silicious hydrogarnet, and C-S-H. The hydration of the 0.40 w/c cement paste was almost complete within a month. Additions of 25 wt% FA increased the fraction of strätlingite and ettringite without long-term strength losses compared to plain BYF cement paste with the same water-to-binder ratio. Results from different characterization techniques for both liquid and solid phases at early-age (first 24 h) were complemented by thermodynamic calculations.
AB - This work reports the evolution of the phase assemblage, pore solution, porosity, and mechanical resistance of Belite-Ye'elimite-Ferrite (BYF) cement pastes. Different water-to-cement (w/c) ratios were considered and the addition of fly ash (FA) evaluated. The initial 1-day hydration of BYF cement paste was characterized by the ye'elimite hydration accompanied by a pronounced alkalinity increase controlled mainly by the molar ratio of calcium sulfate to ye'elimite. Throughout the 1-year test, the phase assemblages of 0.50 and 0.67 w/c samples were similar, composed of ettringite, AFm, strätlingite, silicious hydrogarnet, and C-S-H. The hydration of the 0.40 w/c cement paste was almost complete within a month. Additions of 25 wt% FA increased the fraction of strätlingite and ettringite without long-term strength losses compared to plain BYF cement paste with the same water-to-binder ratio. Results from different characterization techniques for both liquid and solid phases at early-age (first 24 h) were complemented by thermodynamic calculations.
KW - (B) Hydration products
KW - (B) Mercury Porosimetry
KW - (B) Pore solution
KW - (C) Mechanical properties
KW - (D) Sulfoaluminate
UR - http://www.scopus.com/inward/record.url?scp=85090404287&partnerID=8YFLogxK
U2 - 10.1016/j.cemconres.2020.106215
DO - 10.1016/j.cemconres.2020.106215
M3 - Article
AN - SCOPUS:85090404287
SN - 0008-8846
VL - 137
JO - Cement and Concrete Research
JF - Cement and Concrete Research
M1 - 106215
ER -