METHOD FOR PRODUCING BRICKS OR OTHER INERT BUILDING BLOCKS FROM SOILS CONTAMINATED WITH HYDROCARBONS AND MIXTURE USED IN SAID METHOD

摘要

Method and mixture used to produce inert bricks or another type of building block from soils contaminated with hydrocarbons, the method comprising the following steps: a) Providing a percentage of 1% to 60% by dry volume of earth or soil contaminated with hydrocarbons, then grinding and mixing with virgin clays free of contamination, in a proportion of 98% to 39% by volume; b) Adding 1% by dry volume of a binder of sawdust or industrial hydrocarbon-adsorbent type to the sum of the two components from step a) thereby completing the 100% of the dry volume of the mixture; c) Adding water to the mixture from step b) in order to obtain a moisture percentage of the composition of the mixture that is greater than 4% and less than 21%, resulting in a malleable mortar; d) Placing the malleable mortar obtained in step c) in automatic machines for forming bricks or other, similar shaped building blocks; e) Placing the resulting brick or similar block in the main chamber of a continuous kiln where said brick or block is dried and preheated with the hot residual air current from the secondary chamber; f) Firing said bricks or similar blocks at a temperature of between 800ºC and 1000ºC, for approximately 48 hours, during which any trace of hydrocarbon is finally eliminated; g) Cooling said bricks or similar blocks in the final part of the main chamber of the continuous kiln; and h) Storing the bricks or similar blocks obtained.