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L. P. Firsova

Compression strength of the granuls on base crystallosolvates of calcium sulfate


It was investigated carbamide addition effect on the phosphogypsum granuls compression strength. X-ray difraction analysis was demonstrated, that the carbamide and the calcium sulfate produce crystals solvate CaSO4.4CO(NH2)2 in the granuls. Due to the fact, that the granuls pore volume are filled with crystallized solvate CaSO4.4CO(NH2)2 and carbamide, the carbamide addition in wet phosphogypsum provides a high compression strength of the granuls. Furthermore, the strengthening process is accelerating in the presence of the carbamide addition in the granuls.
Moscow University Chemistry Bulletin.
2010, Vol. 51, No. 4, P. 331

Copyright (C) Chemistry Dept., Moscow State University, 2002
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