Compositions: coating or plastic – Coating or plastic compositions – Proteinaceous material containing
Patent
1983-10-26
1986-01-21
Straub, Gary P.
Compositions: coating or plastic
Coating or plastic compositions
Proteinaceous material containing
106119, 106109, 423175, 423637, C04B 202, C04B 734, B02C 1900
Patent
active
045655790
ABSTRACT:
A nonexplosive chemical composition for gently and noiselessly breaking a rock or concrete mass. The composition comprises a principal component which is prepared by calcining a starting mixture comprising 100 parts by weight of quick lime and 1-20 parts by weight of calcium fluoride. In rock or concrete breaking operations, this composition in the form of aqueous slurry is poured into drill-holes and left to spontaneously hydrate and set with development of expansion pressure. For adequate retardation of the hydration, preferably a second fluoride such as Na.sub.2 SiF.sub.6 which gives CaF.sub.2 by reaction with CaO at the calcination temperature is added to the starting mixture. As an alternatively preferable method for the same purpose, an amino acid compound and/or a lignosulfonate is used as a hydration retarding agent which is mixed with the calcined principal component. Various auxiliary agents may optionally be added to this composition.
REFERENCES:
patent: 843277 (1907-02-01), Isaacs
patent: 3884710 (1975-05-01), Allen et al.
patent: 4316583 (1982-02-01), Kawano et al.
patent: 4354877 (1982-10-01), Kawano et al.
patent: 4409030 (1983-10-01), Minegishi et al.
Fujioka Isami
Imada Kazutoshi
Ishibashi Takayuki
Nishimura Motoyasu
Central Glass Company Limited
Straub Gary P.
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