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Chemical Speciation of Trace Zinc in Ordinary Portland Cement Using X‐ray Absorption Fine Structure Analysis
Author(s) -
Tsuyumoto Isao,
Uchikawa Hiroshi
Publication year - 2004
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2004.tb07509.x
Subject(s) - zincate , extended x ray absorption fine structure , xanes , portland cement , zinc , coordination number , absorption (acoustics) , cement , chemistry , absorption spectroscopy , analytical chemistry (journal) , materials science , inorganic chemistry , crystallography , ion , spectral line , metallurgy , composite material , organic chemistry , optics , physics , astronomy
Chemical change of trace zinc in ordinary portland cement (205.1 ppm) was investigated in hydration process using X‐ray absorption near‐edge structure (XANES) and extended X‐ray absorption fine structure (EXAFS). Intensities of the peaks appearing at the same energy of ZnO in XANES spectra were decreased with cement hydration. The interatomic distances and the coordination numbers of the first and the second shells calculated from EXAFS spectra indicated that ZnO hydrolyzed to zincate ion [Zn(OH) 4 ] 2− with cement hydration keeping their fundamental structure of ZnO 4 tetrahedra.