29Si and 27Al MAS-NMR Studies of Fly Ash Changes during the Polymerization of Mineral Polymer
Mineral polymer is a new category of inorganic non-mental materials, which was manufactured from fly ash in this paper. Changes of fly ash in the polymerization can be described as: (1) Q4(0Al) is the main form of Si element in fly ash, with 67.5%content.During the solidification of mineral polymer, the content of Q4(0Al) decrease from 38.7%(3d) to 28.2%(7d) and 26%(14d), then increased to 37.8% in 28 d product; (2) the intensity of Q2(0Al) and Q3(1Al) decrease at first stage, then increase finally during the solidification of mineral polymer; (3) content of Q4(2Al)increase from 14.6%(3d), 39.2%(7d), 40.6% (14d) and decreased to 23.1% in product curing for 28 d product;(4)octahedral aluminum were the main form of Al element in fly ash, which decreased during the polymerization, simultaneously, tetrahedral aluminum increased. The experimental results provided a good basis for understanding the reactive mechanism of polymerization.
Jingtao Han, Zhengyi Jiang and Sihai Jiao
Y. M. Nie et al., "29Si and 27Al MAS-NMR Studies of Fly Ash Changes during the Polymerization of Mineral Polymer", Advanced Materials Research, Vols. 156-157, pp. 794-798, 2011