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[en] The substitution of certain row matters in the process of elaboration of the cement, as flying ashes, polluted soils with petroleum, muds of the industry of the petroleum, oxides of the industry of the steel, foundry sand and tires, they can replace until 40% of the necessities of energy of a cement oven contributing to improve the conservation of the environment. This new technology is using with success in United States and some countries of Europe
Journal
Innovacion y Ciencia; ISSN 0121-5140; 
; v. 4(2); p. 20-21
; v. 4(2); p. 20-21