## 1 Introduction
Physical, mechanical, leaching [25; 26] and chemical [24] tests have been conducted, concluding that heavy metal concentrations (determined by leaching) are acceptable, establishing a direct relationship between the increase in BFS content and the compressive strength; and an inverse relationship as regards absorption [25]. Similarly, it was discovered that the ratios of the different components making up the matrix of the bricks have a relevant impact on the various properties studied [21]. Finally, it was evidenced that a baking temperature ranging from 1000 to 1250 \({}^{\circ}\)C was appropriate to obtain bricks of acceptable quality [24; 25]. Similarly, soil and sand (SS) of petroleum effluents mixed with stone materials have been used to make baked bricks. In a study [27], the results of the physical, chemical and mechanical tests led to the conclusion that the use of SS in brick manufacturing reduces water and fuel requirements, generating a product that complies with all the regulations and \"encapsulates\" toxic metals through vitrification (leaching studies validate compliance with the requirements of the US Environmental Protection Agency). Some special cases have also been studied, such as the use of a mixture of organic materials, for example sawdust (5%), oil polluted soils (15%), compost (10%) and marble (15%) in the manufacture of light bricks baked at 1050 \({}^{\circ}\)C, that achieved compressive strength, porosity and absorption appropriate for use in construction [28; 29]. Likewise, the use of paper waste as an additive in the manufacture of porous and lightweight clay bricks has led to the obtainment of bricks showing adequate thermal conductivity and compressive strength [28; 29]. Ceramic bricks and tiles manufactured using quarrying and mining materials, for example granite rock cutting residues, have also been studied. Their physical and mineralogical characteristics can be considered comparable to those manufactured with conventional materials, and can therefore partially replace them [28]. In another study, tailings from gold mills mixed with red soils were used to make bricks. The different replacement percentages suitable to obtain compressive strength, water absorption and shrinkage equivalent to the reference bricks were determined [30]. Dredging sediments have also been used as a base material for baked bricks (replacing the usual clay) and, in this case also, the ASTM criteria were met [22; 31]. Finally, residues that could be considered inappropriate for use in construction, such as cigarette bunts, have also been investigated as materials to be potentially incorporated in baked clay bricks. The density, strength, thermal conductivity and leaching values of the bricks obtained with this material have demonstrated that this material can also be considered suitable for use in the manufacture of light bricks [32]. Therefore, it is clear that the search for new alternatives of secondary materials to replace the usual non-renewable materials for making bricks or blocks is desirable, feasible, and even necessary, with CD wastes being apparently the most suitable option because of their intrinsic properties and widespread availability. Likewise, the incorporation of organic renewable materials, such as wood or other vegetable wastes, could also be a further suitable source of complementary materials. Moreover, if in addition to using the combination of the above materials, baking in oven could be omitted, then the brick manufacturing industry would drastically reduce its environmental footprint. Therefore, an experimental study for the manufacture of a sustainable brick combining the above mentioned elements has been proposed in this research in order to technically and environmentally validate its application in the construction industry.