An FTIR and XPS investigations of the effects of carbonation on the solidification/stabilization of cement based systems-Portland type V with zinc
✍ Scribed by M. Yousuf; A. Mollah; Thomas R. Hess; Yung-Nien Tsai; David L. Cocke
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 665 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0008-8846
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✦ Synopsis
The effects of carbonation on the solidification/stabilization (S/S) of zinc using Portland cement Type V (OPC) has been investigated by X-ray photoelectron spectroscopy(XPS) and Fourier transform infrared spectroscopy (FTIR). The FTIR results indicate that carbon dioxide reacts with the metal-bonded and hydrogen-bonded hydroxides [CaZn2(OH)6.2H20] generally present in zinc-doped Portland cement (Zn-OPC) samples. XPS examinations of the carbonated products of the undoped and doped (Zn-OPC) samples indicate that the resulting silica phases have chemical states different from standard silica gel. Both FTIR and XPS results suggest that carbonation promotes polymerization of the SiO4units present in OPC matrix. The chemical states of the surface components obtained by XPS analysis are discussed in the light of polymerization of the silicates.