Demolition agent, its preparation and its use

Details Demolition agent, its preparation and its use Demolition agent, its preparation and its use

1980-10-31

1982-10-19

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 97, 106118, C04B 702

Patent

active

043548776

ABSTRACT:
A demolition agent which acts by means of expansive stress generated upon hydration and which is prepared by calcining limestone at 1300.degree. to 1600.degree. C. to produce a hard-burned quick lime whose crystal sizes are 10 to 100 micron, pulverizing the resulting hard-burned quick lime to 1500 to 5000 cm.sup.2 /g (Blaine), mixing 5 to 70 parts by weight of a hydraulic material to 30 to 95 parts by weight of the hard-burned quick lime and furthermore adding 0.1 to 5 parts by weight of an admixture comprising a water reducing agent to 100 parts by weight of the mixture of the powdery hard-burned quick lime and the hydraulic material.
The demolition agent is used as an aqueous slurry. The slurry is filled into holes of a brittle material to demolish the brittle material by means of expansive stress generated upon hydration.

REFERENCES:
patent: 1872512 (1932-08-01), Seaton
patent: 3686133 (1972-08-01), Hattori et al.
patent: 3801339 (1974-04-01), Ogura et al.
patent: 3884710 (1975-05-01), Allen et al.

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