DEMOLITION AGENT, ITS PREPARATION AND ITS USE

摘要

TITLE OF THE INVENTION DEMOLITION AGENT, ITS PREPARATION AND ITS USE A demolition agent which acts by means of expansive stress generated upon hydration and which is prepared by calcining limestone at 1300 to 1600 .degree.C to produce a hardburned quick lime whose crystal sizes are 10 to 100 micron, pulverizing the resulting hard-burned quick lime to 1500 to 5000 cm2/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.