Expansive demolition agent for demolishing brittle structures.
This agent consists of a mixture including at least quicklime as main component and, as auxiliary material, at least alumina, silica and calcium sulphate; as percentage of the final weight of the mixture obtained, the latter contains approximately 60 to 80 % of lime including at least 40 % of quicklime, 5 to 15 % of amorphous alumina Al2O3, 3 to 10 % of amorphous silica SiO2 and less than 15 % of anhydrite CaSO4, all the components of the said mixture originating from raw materials available in this form, such as fly ash originating from the furnace of a coal power station.