Characterization of fly ash-cement paste and molecular structure in the presence of seawater by 27Al and 29Si MAS NMR spectroscopy

• Published in: Construction & building materials Vol. 262; p. 120823
• Main Authors: Li, Jinhui, Liu, Xinquan, Yang, Qingrui, Hou, Dongshuai, Hu, Xiaoxia, Ye, Qiang, Wang, Di, Ding, Qingjun
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 30.11.2020
• Subjects: Aluminate species; Curing stage; Fly ash–cement paste; Mean silicate chain length; Fly ash–cement paste; Curing stage; Mean silicate chain length; Aluminate species

•Incorporating fly ash in cement paste resist the degradation for aluminate-silicate chains.•The activation effect of seawater on fly ash is more pronounced especially in the early curing age.•Delaying the initial exposure age of the paste can reduce the amount of AFt and alleviate its expansion. Ce...