𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Infrared study on the refinement of phosphogypsum for cements

✍ Scribed by H. Ölmez; V.T. Yilmaz

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
286 KB
Volume
18
Category
Article
ISSN
0008-8846

No coin nor oath required. For personal study only.

✦ Synopsis

Phosphogypsum, the by-product of phosphoric acid manufacture, is considered as a gypsum for the control of the setting time of Portland cement and trass cement. However, it is well known that impurities, usually included in phosphogypsum, injuriously affect the hydration of cement. The object of this paper is to clarify the characters of impurities in phosphogypsum produced in Turkey and to obtain refined phosphogypsum using various methods following IR technique.

📜 SIMILAR VOLUMES

The nature of phosphogypsum impurities a
The nature of phosphogypsum impurities and their influence on cement hydration
✍ A.A. Tabikh; F.M. Miller 📂 Article 📅 1971 🏛 Elsevier Science 🌐 English ⚖ 644 KB

## Msterials and Methods A number of chemical reagents and compounds synthesized in the laboratory were used in this study. A list of these is as follows: CaF 2 -Fisher Reagent Grade Ca3(PO~) 2 -Baker Reagent Grade CaHPO4.2H20 -Baker Reagent Grade Ca(H2PO~)2.H20 -Merck Reagent Grade Ca2P208 -Pyroly

Vibrational study on the bioactivity of
Vibrational study on the bioactivity of Portland cement-based materials for endodontic use
✍ P. Taddei; A. Tinti; M.G. Gandolfi; P.L. Rossi; C. Prati 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 736 KB

The bioactivity of a modified Portland cement (wTC) and a phosphate-doped wTC cement (wTC-P) was studied at 37 °C in Dulbecco's Phosphate Buffered Saline (DPBS). The cements, prepared as disks, were analysed at different ageing times (from 1 day to 2 months) by micro-Raman and ATR/FT-IR spectroscopi

Permeability study on the cement based s
Permeability study on the cement based solidification process for the disposal of hazardous wastes
✍ C.S. Poon; A.I. Clark; R. Perry; A.P. Barker; P. Barnes 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 519 KB

Communicated by C.D. Pomeroy) (Received Nov. 12, 1985) The permeability of two cement based solidification processes for the disposal of hazardous wastes based on cement/silicate and cement/pulverized-fuel-ash has been assessed by using an oxygen permeability cell. The effect of three different hea

A study of the nature and formation of z
A study of the nature and formation of zinc polyacrylate cement using Fourier transform infrared spectroscopy
✍ Nicholson, J. W. ;Brookman, P. J. ;Lacy, O. M. ;Sayers, G. S. ;Wilson, A. D. 📂 Article 📅 1988 🏛 John Wiley and Sons 🌐 English ⚖ 434 KB

The formation and structure of zinc polyacrylate has been studied by Fourier transform infrared spectroscopy (FUR). Using this technique we have shown that the t'ully hardened cement is bonded predominantly by zinc carboxylate complexes, rather than by associations of purely ionic character as had p