METHOD OF RECYCLING OILY WASTE SO AS TO PROVIDE A MULTI-USE PAVEMENT

Abstract

A method of forming a multi-use dry pavement from oily waste derived from hydrocarbons has the steps of combining the oily waste with calcium oxide so at as to suspend and homogenize the wastes, adding hydrogen peroxide and water to the oily mixture, and adding ammonium sulfate and water to the mixture. The hydrogen peroxide is mixed with equal amounts of water. The ammonium sulfate is mixed with an equal amount of water. The homogenization process continues until the mixed material forms a granulate. The granulate can be compacted and then used as a pavement.

Claims

1. A method of forming a pavement from an oily waste that is derived from hydrocarbons, the method comprising the steps of: adding calcium oxide in an amount of 20 to 30 weight % to the oily wastes so as to homogenize the oily waste until forming a material with one quarter fines granulometry; adding equal amounts of hydrogen peroxide and water to the oily mixture, 1 to 12 liters of the mixture of hydrogen peroxide and water is added to each cubic meter of the oily mixture; and adding a mixture of equal amounts of ammonium sulfate and water to the oily a mixture, 1 to 12 liters of the ammonium sulfate and water mixture are added to each cubic meter of the oily mixture; and allowing a chemical reaction of the oily waste, the calcium oxide, the hydrogen peroxide in the ammonium sulfate to occur.

2. The method of claim 1, further comprising the steps of: selecting a material from which the oily wastes are derived; determining and analyzing corrosiveness, reactivity, explosiveness, flammability and toxicity of the oily waste; and analyzing a concentration of total present hydrocarbons in the oily wastes.

3. The method of claim 1, the step of homogenizing being carried out manually.

4. The method of claim 1, the step of homogenizing being carried out mechanically.

5. The method of claim 1, the step of homogenizing carried being carried out for approximately 45 minutes.

6. The method of claim 1, further comprising: collecting vapors from the step of homogenizing; condensing the collected vapors; collecting the condensed vapors; and filtering the recovered condensate.

7. The method of claim 6, the step of collecting the vapors being in a bell-shaped dome.

8. The method of claim 7, the step of condensing the vapors being through a Venturi system.

9. The method of claim 8, the step of filtering being by passing the recovered condensate through activated carbon.

10. The method of claim 9, wherein the filtered liquid phase of the recovered condensate is introduced into the step of homogenizing.

11. The method of claim 1, further comprising: continued homogenizing until the oily mixture forms a granulate.

12. The method of the claim 11, the granulate having a one quarter fines granularity.

13. The method of claim 1, further comprising: compacting the mixture resulting from the homogenization process.

14. The method of claim 14, further comprising: forming a pavement with the compacted mixture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0021] The oily wastes are homogenized according to the volume and density thereof. The step of homogenization can be carried out manually or mechanically. Shovels, diggers or mechanical systems can be used for the mechanical homogenization. As the oily waste are homogenized, hydrogen peroxide and a surfactant are added to each cubic meter of the oily wastes. In particular, a mixture of 1 to 12 liters of equal amounts of hydrogen peroxide and water are added. Simultaneously, a mixture of 1 to 12 liters of equal amounts of ammonium sulfate and water are added. The ammonium sulfate and water will act as a fluidizer.

[0022] Once a homogenous consistency is achieved, and until obtaining the optimized and fluidized density, the mixture is broken up so as to observe the texture and viscosity change. At a certain point in time, the mixture is homogenized constantly in a one-to-one ratio with the total hydrogen parts. For example, if the sludge volume is one cubic meter having a total hydrocarbon parts concentration from 20 to 30%, the calcium oxide should be used in an amount of between 20 and 30% by weight. When humidity is low, a lower ratio is used. In contrast, higher humidities will require a higher ratio to be used.

[0023] The chemical reaction process lasts approximately 45 minutes relative to the volume to be treated. In order to prevent any sort of contamination or pollution to the atmosphere, the vapors are extracted with a bell-type dome or other type of extractors. The vapors that are collected are condensed to a Venturi system so as to be collected by cooling tanks. The condensate that is recovered during the chemical reaction process are filtered with activated carbon. The recovered and filtered liquid phase is reincorporated into the initial stage of the process so as to mix and homogenize the wastes.

[0024] In the process of the present invention, the homogenization will continue so as to experience absorbing exothermically reaction and evaporation of the humidity of the mass. This creates a transformation of the treated oily waste into granules of organoleptic presence with a clay appearance having a granularity of fines granulometry. The particles will be non-greasy to the touch.

[0025] The granules are then cooled. At this stage, they do not show any traces of the oily wastes. If these materials are mixed with water, the water would not show any oily traces and the water would be transparent or crystal clear. Only the suspension finds would be observable in the water.

[0026] When used as a pavement, the material should have a compactability that is not less than 90% in the proctor or asstho test ranges. The actual humidity should be less than 20%. The optimal humidity for application would actually be between 6 and 8.8% maximum. This is the optimum compacting level so as to ensure the compacting, cementing and adherence quality for the pavements.

[0027] The physical-chemical properties of the present pavement, by virtue of its permeability to water, will prevent sludge formation when being consolidated uniformly in road bases or sub-base construction. The physical and mechanical properties work as an isolating agent and distribute loads uniformly. As such, this avoids failure due to humidity of the asphalt.

[0028] The material produced by the process of the present invention has certain physical-chemical specifications and characteristics. The color is a sand-type beige varying from suigenerius clear to a dark tone. The odor will have a light odor of hydrocarbons. The material is non-toxic. The pH is between six and nine. The chemical composition would be water-insoluble carbonate. The granulometry is TO fines. The compacting degree is a minimum of 90%. The material is 100% permeable to water. The material is 100% in soluble in water. The maximum humidity degree is 8.8%. The material will cement in cold temperatures. The resistance to axial compression is between 10 and 24 kg/cm.sup.2. The minimum loose specific weight is 950 kg/cm.sup.3. The maximum compacted weight of the material is 1825 ka/cm.sup.3. There is no variation of physical and mechanical properties when exposed to environmental or outdoor conditions. The material can be disaggregated and re-reused in other places without suffering any changes in the mechanical or material properties of the composition.

[0029] The present invention has a variety of applications. In particular, the material produced by the present method can be used for cold patching, terrace body conforming, road bases and sub-bases to improve asphalt or hydraulic concrete uniformity, cores for dam containment, for bridge ramps at approaches, for containment, for the sealing of dirt roads in the lining of dirt roads, in crossings such as shallow places where rivers cross secondary roads, as absorption joints and expansion joints between pavement sections, as secondary road linings, and as an addition with other solid aggregates and commercial asphalt substances so as to enhance the resistance of such materials.

[0030] The multi-use dry-type modified pavement of the present invention is quite different than traditional asphalt pavements. The pavement of the present invention is obtained through oily waste recycling and by accelerated chemical oxidation without the use of any aggregates or bank materials. The pavement of the present invention has physical and mechanical properties of water in solubility and water permeability, of high compactability and cementability. The pavement has the qualities of adherence and cohesiveness with a minimal amount of plasticity. As such, this enables the instantaneous use in areas having compression or axial loads. The present invention allows cold application without any additives. The material used for the pavement of the present invention can be applied in a minimal amount of time in comparison with conventional pavement materials.

[0031] The foregoing disclosure and description of the invention is illustrative and explanatory thereof. Various changes in the details of the illustrated construction can be made within the scope of the appended claims without departing from the true spirit of the invention. The present invention should only be limited by the following claims and their legal equivalents.