Demolition agent for brittle materials

Details Demolition agent for brittle materials Demolition agent for brittle materials

1980-03-18

1982-02-23

Poer, James

Solid material comminution or disintegration

Processes

106 89, 106 90, 106109, 106118, B02C 1900

Patent

active

043165834

ABSTRACT:
The present demolition agent for brittle materials is prepared by pulverizing a clinker which is obtained by mixing a calcareous material, a siliceous material and gypsum at the molar ratio of CaO/SiO.sub.2 =5.0-14.4 and CaSO.sub.4 /SiO.sub.2 =0.13-1.19 and burning the mixture under an oxidizing atmosphere to 1350.degree.-1550.degree. C. The main components of the clinker thus obtained consist of 24-65% by weight of 3CaO. SiO.sub.2 crystals, 30-60% by weight of CaO crystalline particles and 5-17% by weight of CaSO.sub.4, wherein more than 50% by weight of said CaO crystalline particles is included in the large 3CaO.SiO.sub.2 crystals grown.
The present demolition agent is used to break brittle materials by means of the expansive stress of aqueous slurry of the demolition agent poured into the hole of the brittle materials.

REFERENCES:
patent: 3947228 (1976-03-01), Kawano et al.
patent: 3959004 (1976-05-01), Stryker
Jon et al., Sement Gijutsu Nempo, 1977, 31, pp. 66-70, Japan.
Takeshi et al., Japan Kokai Tokkyo Koho, 79-43,935, Application 77-109,944.
Yoshio, Concrete Journal, vol. 11, No. 1, 1973, pp. 39-49, Japan.

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