Mixture for the construction of infrastructural and structural products and related production processes

Abstract

The mixture (1) for the manufacture of structural and infrastructure products comprises at least the following components: - granular inert materials (2); - at least one hydraulic binder compound (3); and - at least one bituminous binder compound (4); wherein the hydraulic binder compound (3) comprises at least one hydraulic binder (7) and at least one of: - polymeric elements; and - auxiliary material comprising at least one of: sand, pozzolan, silica, limestone, cellulose, silica fume.

Description

Mixture for the construction of infrastructural and structural products and related production processes. Technical field The present invention relates to a mixture for the production of infrastructural and structural manufactured products and to the related production process. Background of the technique In the production of manufactured products used in the construction of infrastructures and structures, the use of appropriate binding mixtures adapted to give the manufactured products physical-mechanical characteristics such as to ensure the functionalities, under operating conditions, of the structures or infrastructures of which they will form part. The manufacture of these binding mixtures is known through processes that include a stage of mixing the various components that make up the mixture with water, to obtain a plastically moldable mixture. Once molded into the required shape, this mixture undergoes a curing process, with the components of the mixture undergoing chemical reactions that harden it. One type of binding mixture is represented by "bituminous" mixtures, which comprise a bituminous component such as asphalt, foamed bitumen, or emulsion bitumen, adapted to retain aggregates and inert materials to form bituminous conglomerates. The latter can be used for the construction of surfaces accessible to vehicles, such as, for example, road surfaces and airports. The bituminous component acts as a binder for the inert materials used and, after a certain time interval, necessary for the typical chemical reactions of the conglomerate curing process to occur, provides a useful mechanical resistance to withstand the stresses induced by the static and dynamic loads that the works must face under operating conditions. The bituminous component also gives the conglomerate other properties linked to the physical-chemical nature of the bitumen itself, such as, for example, waterproofing properties, elasticity properties, appreciable levels of plastic deformation before reaching the breaking point, etc. The properties mentioned above can be improved by adding special additive substances to the bituminous mixture, such as, for example, styrene-butadiene-styrene (SBS) polymers, polyvinyl chloride (PVC), atactic polypropylene (APP), or other thermoplastic polymers. In this case, we speak of "additive" or "modified" bituminous mixtures. The use of this first type of known mixture has drawbacks related to the nature of bitumen itself. One drawback is linked to the low capacity to accept loads at high temperatures, with the bituminous component tending to soften as temperatures increase. Consequently, at high atmospheric temperatures, especially in the summer season when the temperature of the road surface can exceed sixty degrees, the pressures exerted by the loads that normally act on the works under operating conditions can cause very high deformations, to the point of impairing the functionality of the work itself or even its breakage. Another drawback is that, under conditions of exposure to sun and air, a bituminous mixture inevitably undergoes oxidation. This oxidation leads to the evaporation of the aromatic and aliphatic components of the bituminous mixture, resulting in the alteration of its chemical bonds. The dispersion of aliphatic and aromatic components in the atmosphere carries serious risks to health and the environment, as they are harmful to all forms of life. This leads to a progressive degradation of the mechanical properties of the conglomerate, which, under the action of tensile loads, thins out due to erosion until it fractures. A second type of binding mixtures are "cement" mixtures, that is, those comprising a hydraulic binder, for example cement, but also cement mortars or similar materials that are adapted to retain aggregates and inert materials to make cement conglomerates such as concrete or similar materials. Cement, which reacts with water and gives rise to the well-known hydration process, gives mechanical resistance to compression to the conglomerate, and is therefore particularly suitable for the manufacture of products that have to withstand this type of stress. This second type of mixture also presents drawbacks related both to the physical-chemical nature of cement, and to the large number of variables involved in the hydration and curing processes of cement conglomerates. In particular, the variables that affect the mechanical behavior of cement conglomerates are numerous and mainly relate to the composition of the clinker, the fineness of the cement itself, and the application methods. All these variables are difficult to control, hindering the diversification of production processes to obtain conglomerates that have different mechanical characteristics and are adaptable to different uses. For example, while cement mixtures are especially suitable for the manufacture of structural components that require high compressive strength, such as foundations and plinths, they are less suitable for the manufacture of road surfaces. In this latter case, in fact, in the state of tension, large shear stresses and other variables, such as thermal expansions, occur, which require a certain amount of structural flexibility. Due to the high rigidity of cementitious aggregate, a road surface made with this material requires the construction of expansion joints designed to provide the infrastructure with the necessary flexibility to withstand the aforementioned stresses. Expansion joints, both by their very nature and due to poor maintenance and construction quality, are prime points for rainwater infiltration beneath the road surface, with the resulting negative effects. Another drawback of using cement conglomerate in road surface construction is linked to the low resistance to wear of the outermost layer of the road surface, to atmospheric phenomena, to impacts and to "extraction", that is, the capillary rise of salts present in the soil that penetrate the concrete and, as they expand, increase the pressure on the top of the road surface, causing the expulsion of the cement part. These phenomena involve the gradual consumption of the concrete layer covering the inert materials, exposing the latter to the direct action of atmospheric phenomena and the action of tires and, therefore, to a gradual degradation due to both carbonation phenomena from acid rain and rolling resistance. Furthermore, the manufacture of products by combining the mixtures described above is well known. An example is the use of bituminous mixtures and cement mixtures for the construction of road surfaces. In this case, the mixtures are used in later stages of the manufacture of the manufactured product, in particular, the cement mixture is poured into a layer of asphalt previously made with the bituminous mixture, to obtain macadam with slurry. Pouliot et al. (Journal of Materials in Civil Engineering, vol. 15, no. 1, 2003, pp. 54–59) disclose mortars prepared with a blend of cement slurry binder and asphalt emulsion. As reported in the abstract, various binders can be used for the cold recycling process, including asphalt emulsion, asphalt foam, hydraulic binders, or mixed binders. Of the latter, asphalt emulsion is typically used with the addition of a small amount of cement (less than 2% of the total aggregate mass) to accelerate emulsion breaking. However, Pouliot et al. does not disclose the presence of at least one of the polymeric elements within the hydraulic binder composition. The combined use of the two mixtures, however, causes difficulties in the manufacturing process of the manufactured product, as the latter requires multiple manufacturing stages and laborious and costly execution techniques. Description of the invention The main objective of the present invention is to provide a mixture for the manufacture of infrastructural and structural products that allows obtaining manufactured products with resistance and elasticity values ​​adaptable to the use of the manufactured product. An object of the present invention is to provide a mixture for the manufacture of infrastructural and structural products that allows for the production of manufactured products with improved fracture resistance, fatigue resistance, and durability as defined in the attached set of claims. Another object of the present invention is to provide a mixture for the manufacture of infrastructural and structural products that allows for the production of vehicle-accessible surfaces in a fast and efficient manner, as defined in the attached set of claims. Another object of the present invention is to provide a mixture for manufacturing infrastructural and structural products that overcomes the aforementioned drawbacks of the prior art within the scope of a simple, rational, user-friendly, and affordable solution, as defined in the accompanying claims. The aforementioned objects are achieved by a process for producing a mixture for manufacturing infrastructural and structural products as defined in the accompanying claims. The subject matter of the invention is therefore the material defined in the appended claims. Brief description of the drawings Other features and advantages of the present invention will become more apparent from the description of a preferred embodiment of a mixture for the manufacture of infrastructural and structural products and the related production process, illustrated by way of indicative, but not limiting, examples in the accompanying drawings, in which: Figure 1 is a schematic view of a stage of the process according to the invention; Figure 2 is a detailed schematic view of the mixture according to the invention; Figure 3 is a schematic view of a possible application according to the invention; Figure 4 is a schematic view of a detail of an application of the mixture according to the invention. Embodiments of the invention With particular reference to the figures, reference number 1 designates globally a mixture for the realization of infrastructural and structural manufactured products. According to a first object of the invention, the mixture 1 comprises granular inert materials 2 in a concentration by weight, evaluated with respect to the total weight of the mixture, between 50 and 81%; a hydraulic binder compound 3 at a weight concentration, assessed with respect to the total weight of the mixture, between 17 and 37%; and a bituminous binding compound 4 in a concentration by weight, assessed with respect to the total weight of the mixture, between 2 and 10%. Conveniently, the granular inert materials 2 are granular mineral elements of different natures, such as sand, silica, fragments of carbonate rocks, vermiculite and still others. The hydraulic binder compound 3 of the claimed mixture comprises at least one hydraulic binder 7 of the premixed cement type and at least one of: - polymeric elements, not shown in the illustrations for simplicity, and - auxiliary material comprising at least one of the following materials: sand, pozzolan, silica, limestone, cellulose, silica fume. The polymeric elements of the claimed mixture are selected from styrene-butadiene-styrene (SBS), polyvinyl chloride (PVC), vinyl acetate or vinyl versatate or other thermoplastic polymers. Advantageously, the polymeric components are present in a concentration by weight, evaluated with respect to the total weight of the mixture, of less than 5%. In this way it is possible to impart elastic properties to the manufactured products that can be obtained with mixture 1. The polymeric elements, in fact, increase the elasticity of the manufactured products, to ensure shape memory for products made with mixture 1. This implies that, within certain stress limits, products made with mixture 1 have elastic behavior, in particular, in a formulatically modular way. In the case of structural foundations, for example, this elastic behavior ensures an adequate response to dynamic stresses (seismic forces), preserving the functionality and safety of the structure itself. In the case of road surfaces, this elastic behavior eliminates the need for expansion joints, which would otherwise be required to cope with deformations induced by temperature variations. The auxiliary material has the function, in the production process of the mixture, of facilitating the development of chemical reactions and chemical bonds adapted to alter the physical-chemical characteristics of the manufactured products to be obtained. For example, pozzolan increases the product's water resistance, while polymers increase its elasticity. In any case, the hydraulic binding compound 3 determines the strength value of the products manufactured with mixture 1. By increasing or decreasing the amount of hydraulic binder compound 3, the strength increases or decreases, giving a hypothetical user the possibility of modulating this characteristic. The bituminous binding compound 4 of the claimed mixture is a bituminous emulsion. Preferably, the bituminous emulsion comprises an amount of water with a concentration by weight, evaluated with respect to the total weight of the bituminous emulsion, between 40% and 60%. Advantageously, the bituminous emulsion is of the type of a cold bituminous emulsion. These characteristics facilitate the chemical process, described below, which leads to the formation of elastic bridges during the curing of a manufactured product made with mixture 1. Advantageously, mixture 1 comprises complementary substances, not shown in the illustrations for simplicity of illustration, comprising at least one of a retarding substance, an accelerating substance, an anti-shrinking substance, an anti-segregating substance, and a water reducer. These substances are, for example, sodium gluconate as a retarder, aluminous cements as an accelerator, cellulose ether as an anti-segregating agent, a melamine-based polycondensate as a water reducer, a sulfonated substance, and a liquid product containing organic substances as an anti-shrinking agent. These substances allow the user to control the curing stage of the mixtures made with mixture 1 to make the manufactured products, that is, that group of chemical reactions that allow the mixtures to go from a first limit state, in which they have liquid properties and low resistance to deformation, to a second limit state, in which they have solidity characteristics and high resistance to deformation. In this document, a mixture 1 is disclosed as useful for understanding the present invention, having the following composition. The granular inert materials 2 are present at a weight concentration, assessed with respect to the total weight of the mixture, between 40% and 92%. The hydraulic binder compound 3 is present at a concentration by weight, evaluated with respect to the total weight of the mixture, between 8% and 60%. The bituminous binding compound 4 is present at a concentration by weight, assessed with respect to the total weight of the mixture, between 0.3% and 13%. This composition allows the physical and mechanical characteristics of the manufactured product to be chosen in advance. By varying the quantities of the components described above, it is possible to obtain manufactured products that are more or less elastic, deformable with shape memory, and more or less rigid, freeing the characteristics of elasticity from those of rigidity. Within the ranges of values ​​given above, in fact, the bituminous binding compound 4, the hydraulic binding compound 3 and the inert materials 2 cooperate in such a way as to allow the rigidity of the manufactured product to be increased while preserving its elasticity. The amount of hydraulic binder compound 3, bituminous binder compound 4 and granular inert materials 2 depends on the manufactured product to be made with mixture 1. These quantities actually affect the degree of rigidity or elasticity that must be given to the final product, as well as the type of workability to be carried out to manufacture the product. According to another preferred embodiment of the invention, mixture 1 has the following composition. The granular inert materials 2 are present at a weight concentration, assessed with respect to the total weight of the mixture, between 58% and 73%. The hydraulic binder compound 3 is present at a weight concentration, assessed with respect to the total weight of the mixture, between 25% and 35%. The bituminous binder compound 4 is present at a concentration by weight, measured against the total weight of the mixture, of between 2% and 7%. This composition allows for the production of manufactured products particularly suited for structural foundation elements, especially those designed to withstand earthquakes. The manufactured products made with this embodiment of mixture 1, in fact, show sufficient rigidity to support the loads of a structure and at the same time show a great capacity for dissipation linked to the elasticity and shape memory given by the bituminous component and by the polymeric elements. In particular, the bituminous binder compound 4 and the polymeric elements are present in such quantities as to provide the manufactured product with the appropriate elastic response in the presence of dynamic stresses such as, for example, stresses due to seismic actions. The result is a manufactured product resistant to static, dynamic loads and fatigue, as demonstrated by the tests described below. As mentioned above, mixture 1 according to a first object of the invention has the following composition. The granular inert materials 2 are present at a weight concentration, assessed with respect to the total weight of the mixture, between 50% and 81%. The hydraulic binder compound 3 is present at a weight concentration, assessed with respect to the total weight of the mixture, between 17% and 37%. The bituminous binding compound 4 is present at a concentration by weight, assessed with respect to the total weight of the mixture, between 2% and 10%. This composition makes the mixture particularly suitable for manufacturing infrastructure products, particularly for making road and airport surfaces and the like. The mixture 1 thus composed, in fact, allows obtaining fine products with surprising mechanical characteristics thanks to the cooperation of the materials that make up the mixture. In particular, the surface layers of roads or airports manufactured in this way cover a stiffness range between 15000 MPa and 25000 MPa, that is, a range of values ​​that no material traditionally used for this type of manufactured product is able to cover. For bituminous conglomerates, stiffness almost never reaches 15000 MPa, while for concretes, the values ​​often exceed 30000 MPa. Furthermore, the mixture 1 thus composed provides the manufactured products with excellent fatigue resistance properties (repeated loads), as described in the tests shown below. Mixture 1 allows for road surfaces that exhibit fracture resistance typical of concrete with fatigue behavior typical of bituminous aggregates. Furthermore, this behavior does not change with temperature variations. Also disclosed in this document, as useful for understanding the present invention, is a mixture 1 having the following composition. The granular inert materials 2 are present at a weight concentration, assessed with respect to the total weight of the mixture, between 62% and 89%. The hydraulic binder compound 3 is present at a concentration by weight, assessed with respect to the total weight of the mixture, between 10% and 30%. The bituminous binder compound 4 is present at a concentration by weight, measured against the total weight of the mixture, of between 1% and 8%. This composition makes the mixture particularly suitable for use as plaster or as a leveling slurry. In this document, a mixture 1 is disclosed as useful for understanding the present invention, having the following composition. The granular inert materials 2 are present at a concentration by weight, assessed with respect to the total weight of the mixture, between 75% and 90%. The hydraulic binder compound 3 is present at a concentration by weight, assessed with respect to the total weight of the mixture, between 5% and 15%. The bituminous binding compound 4 is present at a concentration by weight, assessed with respect to the total weight of the mixture, between 5% and 10%. In this case, the binder 7 is a gypsum and corn starch compound. This composition makes mixture 1 particularly suitable for use as a leveling mortar for floors or other surfaces. Another object of the invention is the use of mixture 1, as defined in the appended claims, for the manufacture of infrastructural and structural products. This involves combining mixture 1 with a water-based solvent to prepare a substantially homogeneous, moldable mixture 5 for the manufacture of a finished product. Preferably, the use of mixture 1 involves combining it with water. In this way, a mixture 5 can be obtained to be used according to the manufactured product to be made. If a foundation element is to be manufactured, Mixture 5 can be molded and then cured. If a road surface is to be manufactured, Mixture 5 can be laid like a traditional bituminous conglomerate in a single pass. Similarly, if mixture 1 is to be used as a leveling slurry or leveling mortar, it will be enough to prepare mixture 5 and spread it like traditional products. In any case, the mixture 5 obtained is moldable, that is, with low resistance to deformation, and has a behavior similar to a viscous liquid. In this way, mixture 5 can be given the desired final shape. Mixture 5 undergoes a subsequent curing stage, a stage during which physical and chemical reactions take place between the various substances. These reactions essentially lead to a hardening of mixture 5, which gives it mechanical strength properties. In particular, the main process of the curing stage refers to the hydration of the hydraulic binder 7. The hydraulic binder compound 3 attracts the water present to give rise to hardening reactions of the cement paste. The water used in these reactions is both that added to mix the mixture 5, and that present in the bituminous emulsion of the bituminous binder compound 4. The water extracted from the emulsion carries bituminous filaments into the mixture, creating elastic bridges 6 (figure 2) between the various coarse inert materials covered by the hydraulic binder. In this way, during the curing stage, a reticular bitumen structure is created that gives elasticity to the cured mixture 5. The result is a synergistic union between the two binders (cement and bitumen) that allows one to compensate for the limitations of the other. This synergy is enabled by the insertion of bituminous binder 4 in the form of a cold emulsion. In this way, in fact, the high temperatures that would otherwise break the chemical bonds that allow the synergistic action of the two binders are not reached. The process for producing a mixture for the construction of road surfaces or similar comprises a mixing stage I, shown in Figure 1, of the following components: granular inert materials 2, a hydraulic binder compound 3 and a bituminous binder compound 4 as defined in the attached set of claims. Advantageously, the process comprises a premixing stage of the hydraulic binder 7 with at least one of the polymeric elements and the auxiliary material, before mixing stage I, to obtain the hydraulic binder compound 3. In particular, the premixing stage comprises a stage of adding polymeric elements. The addition of polymeric elements allows for varying the modulus of elasticity of mixture 5, resulting in a final product that is more or less rigid or more or less elastic, with shape memory, depending on the intended use. The polymeric elements, as well as the bitumen, integrate the structural bonds that form within the mixture, thus increasing its elasticity. The premixing stage also includes a stage for adding auxiliary material. In this treaty, auxiliary material means any material that is usable in the production of premixed hydraulic binders, such as, for example, sands, limestones, propylene fibers, oxides for any coloring of the manufactured products, aluminum, silicate, kaolin, blast furnace slag, celluloses, silica fume, corn starch, etc. The auxiliary material facilitates the reactions that occur during the curing stage and promotes synergistic compatibility between the hydraulic binder compound 3 and the bituminous binder compound 4. The process also includes a pre-additive stage, prior to the mixing stage of the bituminous binder compound 4 with an additive material and adapted to obtain a modified cold emulsion of the bituminous binder itself. In the present treaty, additive material means any material usable to manufacture a modified bituminous emulsion, such as, for example, SBS polymer or other similar polymers. The additive material allows for the improvement of the properties of the bituminous binder compound 4, as well as promoting synergy with the hydraulic binder compound 3. In the present embodiment, the cold emulsification of the bituminous binder is retarded. The delayed bituminous emulsion is a bituminous emulsion that, thanks to its components, sets more slowly than traditional bituminous emulsions, favoring the formation of bonds with the hydraulic binder compound 3. The bituminous binder compound 4, inserted into a cold emulsion, allows operation at much lower ambient temperatures than those typically used for hot-mix asphalt production, i.e., approximately 150 °C. Finally, the process also includes a step involving the addition of complementary substances comprising at least one retarder, one accelerator, one anti-segregation agent, and one water reducer. This addition of complementary substances takes place during the mixing stage, but solutions in which this step occurs during the premixing stage of the hydraulic binder compound 3, or in both the mixing and premixing stages, are not excluded. The mechanical properties of the manufactured products obtained from this mixture have been tested both in the laboratory and in the field. In an initial experimental test, a cylindrical specimen like the one in Figure 4 was subjected to load tests in a laboratory to bring the specimen to the point of fracture. In particular, the "Indirect tensile fatigue test EN 12697-24 (according to European standard 12697-24)" was performed, with a maximum load of 1600 kPa. The tests were carried out at the Poliedro Srl laboratory located at Via Maestri Del Lavoro 91 / 93 25014 Castenedolo (BS), Italy on February 7, 2015 and produced the following results. A test specimen made with conventional asphalt and inert materials broke after approximately 2,000 blows. A test specimen made with highway binder broke after 10,500 blows with a load of 800 kPa. A test specimen made with modified bitumen and premixed cement broke after 60,000 blows with a maximum load of 1600 kPa. A test specimen made with modified bitumen, premixed cement, and added polymers was declared "indestructible" for testing purposes because, after 200,000 blows, it had not broken despite being subjected to the maximum load of 1600 kPa. The modified bitumen-premixed cement mixture resulted in a thirty-fold increase in strength compared to a traditional bitumen specimen. The addition of polymers further increases this resistance, taking it to values ​​at least one hundred times higher than those of traditional bitumen and approximately 3.5 times higher than those of the modified bitumen-premixed cement mixture. The tests carried out demonstrate the surprising effect of the synergistic action between the cementitious component and the bituminous component on the mechanical properties of the mixture, with the consequent advantages from the point of view of application. In a second experimental test, an open-air test field was installed, and a running surface of no more than 12 cm thick was manufactured with mixture 1 and on this a repeated dynamic load test campaign (accelerated fracture test ATP) was carried out using "fast falling weight deflectometer" (FFWD) and under the scientific direction of Dr. Ing. Alessandro Marradi of the University of Pisa. Repeated loads were applied to the surface to measure the resulting surface deflections, which will be used as data to implement a retroactive calculation procedure to track elastic modulus values, fracture values, and other useful information. The tests confirmed the characteristics that had emerged in the first laboratory test described above. In particular, the ATP test took place from April 12 to 14, 2016 and was carried out by repeating 300 series of 100 load applications each, for a total of 30,000 applications in total, with an average productivity of 1,200 trips / hour. For each route, the configuration that considers the maximum load and maximum drop height was used to determine a transmitted pressure of approximately 1500-1600 KPa. The central deflection at the beginning and end of the test was 477.8 micrometers and 618.4 micrometers, respectively. These data were used to calculate the evolution of the surface modulus of elasticity and were used in the retroactive calculation procedure to track other data useful for characterizing the material properties. After 30,000 load repetitions, the investigated area showed no cracks. The value of the elastic modulus gradually decreased as the number of blows increased. The surface proved to be more or less insensitive to variations in heat. In conclusion, the two experimental tests showed that the mixture provides high resistance to repeated loads and a gradual degradation of performance over time. In practice, the described invention has been found to achieve its intended objectives. In particular, it is emphasized that the resulting mixture for manufacturing structural and infrastructural products allows for the production of manufactured goods with adjustable strength and elasticity values, meaning they can be adapted to the intended use. In fact, simply changing the quantities of the various components is enough to achieve different moduli of elasticity while maintaining the same deformation response. The provided mixture also allows for the production of manufactured products with improved fracture resistance, fatigue resistance, and durability. The cooperation between the various components, demonstrated by experimental tests, highlighted a surprising physical-mechanical behavior of the manufactured products made with the provided mixture, in particular the high resistance to deformability and shape memory, the ability to withstand heat variations, impermeability and the possibility of modulating these characteristics by varying the quantities of the components. In other words, the provided mixture showed a surprising cooperation between all the components involved, in particular the hydraulic and bituminous binding compounds, the polymers, the auxiliary material and the inert materials, to obtain a multifunctional product, adaptable to different types of use and with modular physical and mechanical characteristics. Another advantage of the provided mixture is that it allows for the rapid and efficient manufacture of surfaces passable by vehicles, with the mixture itself being extensible like the traditional materials already used for the construction of roads and airports. The process according to the invention also allows obtaining a mixture usable in various fields of application. In fact, by varying the amount of polymers and bituminous emulsion, a final mixture with a different elastic modulus can be obtained, making it suitable for diverse applications, from structural surfaces and manufactured structural products to plasters, paints, and self-leveling grouts, etc. In this last case, the mixture could be used as a surface coating that, in addition to being self-leveling, gives the surface fire-resistant properties and prevents the oxidation of the components in the inner surface layers.

Claims

1. A mixture (1) for the manufacture of infrastructural and structural products, comprising: - granular inert materials (2) in a concentration by weight, evaluated with respect to the total weight of the mixture, between 50 and 81%; - a hydraulic binder (3) in a concentration by weight, evaluated with respect to the total weight of the mixture, between 17 and 37%; and - a bituminous binder (4) in a concentration by weight, evaluated with respect to the total weight of the mixture, between 2 and 10%; wherein said hydraulic binder (3) comprises - at least one hydraulic binder (7) of the premixed cement type, and at least one of: - polymeric elements, and - auxiliary material comprising at least one of: sand, pozzolan, silica, limestone, cellulose, silica fume;wherein said hydraulic binder compound (3) is obtained by a premixing step of the hydraulic binder (7) with at least one of the polymeric elements and the auxiliary material, prior to mixing at least said granular inert materials (2), said hydraulic binder compound (3) and said bituminous binder compound (4); wherein said polymeric elements are selected from styrene-butadiene-styrene (SBS) polymers, polyvinyl chloride (PVC), vinyl acetate or vinyl versatate or other thermoplastic polymers;and wherein said bituminous binding compound (4) is a bituminous emulsion.

2. The mixture (1) according to the preceding claim, wherein said polymeric elements are present in a weight concentration, evaluated with respect to the total weight of the mixture, of less than 5%.

3. The mixture (1) according to any of the preceding claims, characterized in that said bituminous emulsion comprises an amount of water with a weight concentration, evaluated with respect to the total weight of the bituminous emulsion, of between 40% and 60%.

4. The mixture (1) according to any of the preceding claims, characterized in that said bituminous emulsion is of the type of a cold bituminous emulsion.

5. The mixture (1) according to any of the preceding claims, further comprising one or more complementary substances selected from the group of: - a retarding substance; - an accelerating substance;- an anti-shrinkage substance; - an anti-segregation substance; and - a water reducer.

6. The mixture (1) according to any of the preceding claims, wherein - said granular inert materials (2) are present in a weight concentration, evaluated with respect to the total weight of the mixture, of between 58-73% by weight; - said hydraulic binder compound (3) is present in a weight concentration, evaluated with respect to the total weight of the mixture, of between 25-35% by weight;- said bituminous binding compound (4) is present at a weight concentration, evaluated with respect to the total weight of the mixture, of between 2% and 7%.

7. Use of a mixture (1) according to any of claims 1-6 for the manufacture of infrastructural and structural products, characterized in that it comprises a combination of said mixture (1) with water-based solvents for the preparation of a substantially homogeneous, moldable mixture (5) for the manufacture of a manufactured product.

8. A process for the production of a mixture for the manufacture of infrastructural and structural products, characterized in that it comprises: a mixing step (I) of at least the following components: - granular inert materials (2) at a weight concentration, evaluated with respect to the total weight of the mixture, of between 50% and 81%;- at least one hydraulic binding compound (3) in a concentration by weight, assessed with respect to the total weight of the mixture, between 17 and 37% wherein said hydraulic binding compound (3) comprises at least one hydraulic binder (7) that is of the premixed cement type; and at least one polymeric element, and auxiliary material comprising at least one of: sand, pozzolan, silica, limestone, cellulose, silica fume; and - at least one bituminous binding compound (4) in a weight concentration, assessed with respect to the total weight of the mixture, between 2 and 10%, wherein said bituminous binding compound (4) is a bituminous emulsion, and a premixing step of said at least one hydraulic binder (7) with at least one of the polymeric elements and the auxiliary material prior to said mixing step (I), to obtain said hydraulic binding compound (3);wherein said polymeric elements are selected from styrene-butadiene-styrene (SBS) polymers, polyvinyl chloride (PVC), vinyl acetate or vinyl versatate, or other thermoplastic polymers.

9. The process according to claim 8, characterized in that it comprises a pre-additive step, prior to said mixing step (I), of said bituminous binder compound (4) with an additive material, adapted to obtain a modified cold bituminous emulsion.

10. The process according to one or more of claims 8 or 9, characterized in that it comprises a step of adding complementary substances comprising at least one of a retarder, an accelerator, an anti-shrinkage agent, an anti-segregation agent, and a water reducer.

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