Dry cement composition

Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

106101, 106102, C04B 2214

Patent

active

047846917

ABSTRACT:
A dry cement composition containing an amount of ferrous sulphate (FS) for eliminating or substantially reducing the content of water-soluble chromate, is produced by grinding a starting material (C, G) in a cement mill, and the ground cement material is passed from the mill to a storage container (33) The ferrous sulphate in an amount of 0.01-10 and preferably 0.4 percent by weight is added to and mixed with the starting material in a dry or non-dissolved condition at a location or at locations upstreams of the storage container (33). The ferrous sulphate is preferably added to the starting material upstream of the cement mill.

REFERENCES:
patent: 931884 (1909-08-01), McCormick
patent: 2307270 (1943-01-01), Hodge
patent: 2316039 (1943-04-01), Wilson
patent: 3425892 (1969-02-01), Edelson et al.
patent: 4122059 (1978-10-01), Hansen
patent: 4209335 (1980-06-01), Katayama et al.
Contact Dermatitis, 5 39-42 (1979) Fregert et al.
Chemical Abstracts, vol. 88, No. 20, p. 273, col. 2.
Berufs derufsdermatosen 20, 5, 238-248 (1972) Fregert et al.
"The Technology of Binders," Butt et al, Moscow (1952) 342-343.
Dansk Betonindustri, 72 (1980):3, p. 71, "Forholdsregler mod kromateksem ved arbejde med cement og ikke-haerdnet beton".
RILEM congress, "Quality Control of Concrete Structures", Jun. 17-21, 1979, Stockholm Sweden. Proceedings vol. 2, pp. 179-185, Prevention of Skin Diseases due to Fresh Concrete.
Pas pa! No. 11. 80, pp. 28-20, "Cementeksem kan forebygges".
Medlemsudsendelse Betonelementforeningen No. 936/80, mailed on Feb. 26, 1979.
Chromium in Cement, Thesis, Efterar 1976, Marianne H. Lund, English Translation, pp. 2-5.
Chromium in Cement, Nordisk Betong, 6, 1977, Marianne H. Lund (English Translation).
Letter from Sigfrid Fregert to Denmark's Geological Survey, Apr. 6, 1977 (English Translation).
Arbejdsmilj. 2/78, pp. 10-11, "J.rnsulfat i betongen och allergiriskerna minskar".
Apr. 7, 1987 Letter from Melchemie Holland B.V. to Aalborg Portland Cementfabrik A/S.
American Industrial Hygiene Association Journal, vol. 35, No. 1, pp. 301-305; 1974.
Chemical Abstracts, vol. 79, No. 16, p. 271, column 2, 96214c and Acta and Acta Dermatovener (Stockholm) 267-270, S. Fregert et al.
Berufsdermatosen, vol. 25, 220-229; 1977.
Berufsdermatosen', vol. 21, 168-183; 1973.
Annex 3 to Circular Letter 15 issued by Cemburean (European Cement Association), Paris, S. Fregert et al.; 3/1/79.
Publication by Cementa AB, E. Sanddahl 10/13/77.
Zeitschrift fur die Gesammte Hygiene und ihre Grenzgebiete, Heft 9, pp. 625, 628; 9/9/80.
Zewitschrift fur Hygiene und Grenzgebiete, pp. 173-178; 1969.
Baustoffindustrie, pp. 4-6; 5/3/80.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Dry cement composition does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dry cement composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dry cement composition will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1101828

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.