Abstract: This process allows the attainment of cementitious materials and activated artificial pozzolana, developed as from shale oils and/or residues of its processing, hereinafter simply called “shale oil”, mixed among them and/or with clays when placed in the rotation oven, in proportion that vary from 1% to 100% of the shale oils in the mixture. These shale oils or mixtures of shale oil with clays, when burn in temperatures between 600° C. and 900° C., in a horizontal oven, in reducing conditions, generate the so called cementitious materials or activated artificial pozzolana, when in contact with the water, providing to the material agglomerating properties.