• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention shows a self-hardened asphalt concrete made from pavement recovered by a dry inorganic additive formed by (alcl3, cacl2, p2 o5, cao and fe2 o3), which raises the temperature of recycled rap asphalt without external energy input to temperatures between 40 and 90ºC through the following process: The recovered rap is mixed with the different products that constitute the additive and then the hydrocarbon binder (bitumen, asphalt emulsion or synthetic binder) is added. Through this process a homogeneous mixture is achieved, ready to apply and spread like a traditional asphalt. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2583141A1
    申请号:ES201500204
    申请日:2015-03-17
    公开日:2016-09-19
    发明作者:Rafael ROS PÉREZ；Jesús Vicente DE JULIÁN ORTIZ；José Vicente TARAZONA DÍEZ
    申请人:Fundacion Investigacion e Innovacion para el Desarrollo Social；
    IPC主号:
    专利说明:

    in areas where access is difficult or impossible due to excessive hot asphalt transport time, which can no longer be applied under the required conditions. Just think of mountainous regions of difficult access or countries of the Andes, whose road communication needs are more than necessary. Traditionally, the technique without the most commonly used heat energy is that of manufacturing and spreading cold asphalt mixtures, based on the mixture of a set of mineral aggregates and a bituminous binder, usually an asphalt emulsion that is a dispersion of small drops of a hydrocarbon binder (usually asphaltic bitumen) that acts as a dispersed or discontinuous phase, in a solution of water -H20- and an emulsifying agent (continuous or dispersing phase) of anionic or cationic character. These mixtures are manufactured in central (Cold plant), and are likely to be stored and packaged for long periods of time, since unlike hot mixes they are not perishable products due to temperature. The emulsions that form them are normally made of high penetration bitumen, fluxed with some type of gasoline. This gasoline substantially increases the ductility of the mixtures and is responsible for the mixtures being extended and compacted on site at room temperature. Over time, this product evaporates, in what is known
    as a process of curing the agglomerate, an effect that, in addition to the oxidation of bitumen itself, ends up turning the cold agglomerate into a surface resistant to low solicitation traffic. This evaporation process is usually slow and depends, in large part, on the surface temperature. For this reason, these agglomerates often present problems of significant plastic deformations (rodera), due to their low initial consistency that cause the agglomerate not to comply with the requests to which it is subjected. This is common especially in pavements with an overpass of traffic or subjected to sharp turns, which end up breaking down and causing significant damage. A similar effect is that which occurs with current techniques for in situ recycling with emulsion, where the low initial consistency of the material requires considerably delaying the commissioning time of the works, and is primarily responsible for the little success that this Type of techniques have reached in the market. Currently there are many emerging techniques that try to solve this problem and Temperate and Semi-solid mixtures have been developed, in which the set-up temperature is reduced, with the consequent energy savings and environmental benefits. However, such mixtures still need a
    manufacturing plant with external energy supply and have the same expiration problems, by temperature, as conventional hot mixes. The technical studies carried out show that there is a very significant influence of the temperature on the mechanical properties of the agglomerates and recycled in cold with emulsion, there being a threshold temperature from 40 ° C, in which the mechanical properties achieved are considerably higher than that of cold techniques and they begin to be comparable with hot techniques. The object of the present invention is to expose a procedure that allows recovering asphalt pavement by increasing the working temperature in situ by incorporating different products that, when reacting, produce heat that is transmitted to the mixture. This process also allows water to be removed more quickly, reaching mechanical characteristics in a shorter period of time. The temperature increase reached is controllable and depends on the initial dosage of each of the products. This technology can also be applied to cold agglomerates, recycled in situ, recycled in central, aggregates and in general any process in which a previous heating is necessary and the incorporation of the water necessary for the reaction is viable. STATE OF THE TECHNIQUE:
    The following references related to the use of additives have been found, and processes that have contributed to the development of Self-Tempering Mixtures to produce Asphalt Concrete: US 5512093 A (CHEMICAL LIME L TD) 30.0401996 US 4272212 A (BAUER JR ANDREW J) 09.06. 1981 US 4272212 A (DOWNARD JAMES S) 03.09.1929 WO 9902620 A1 (CHEMICAL LIME LTD) 21.01.1999 ES2343774 B (FOUNDATION RESEARCH INNOVATION FOR SOCIAL DEVELOPMENT) 5.11.2008 EP 0666886 B (AKTIEBOLSGET NYNAS PETRO99UM) 2.11140 US $ 1,140 B (WRBAYLEY) 8.11.1998 US 4561901 A (WESTVACO COORPORATION) 31.12.1985 US 5743934 A (MAGIC GREEN CORPORATION) 5.7.1996 US 6514334 B (BROUGHSHIRE LlMITED) 4.2.2003 US 7303626 B (WRBAILEY) 4.12.2007 US 2011/0174195 A (D. LESUEUR, F. DELFOSSE, JV MARTIN) 21.7.2011 The last deserves special attention, since it exposes the use of exothermic mixtures and contemplates many of the reactions that exist between acids and bases that react releasing heat in aqueous systems you are Unlike the process presented in this patent, there is no use there of recycled material as a mineral skeleton. On the contrary, our patent includes waste
    recycled aggregates, and complex mixtures of the additives calcium chloride -CaCb-, phosphorus pentoxide -P20 5-and aluminum chloride -AICI3-with calcium oxide -CaO-. The concept of heating due to the dissolution of the CaCb, which contributes to raising the temperature of the bituminous mixture of asphalt concrete, is not reflected in the above reference. Therefore, although there are some common compounds, the present patent adds components that were not previously contemplated. DESCRIPTION OF THE INVENTION
    The present invention involves the search for an additive that eliminates all the problems set forth in the background of the invention and allows the development of a paving process based on recycled material where the bitumen mixture "Autotemplada" of asphalt concrete is carried out in the place where the pavement. The constituent materials of the "Self-timed" mixture are the following:
    1-A mineral skeleton, composed of recycled material
    (RAP; Reclaimed Asphalt Pavement) that constitutes
    between 50 and 90% of the bituminous mixture, with a
    certain humidity (between 0.5% and 5 0/0).
    2-A link hydrocarbon te, which acts as a binder
    (bitumen, bituminous emulsion, synthetic binders)
    dosed between 2% to 15% on the mixture.
    3-Y the additive, which consists of a mixture of different products that when reacting provide the heat energy to the whole (it is dosed between 1% and 10% on the mixture).
    The advantage of incorporating RAP recycled material, is to be able to recycle aged aggregates and asphalts producing environmental savings in these two natural resources. Within the additive it is possible to distinguish different compounds, a first group that are the additives strongly reactive with water such as Calcium Chloride (CaCb), Phosphorus Pentoxide (P20 5) and Aluminum Chloride (AICI3) (the dosage for each one of these compounds ranges from 0% to 25% on the global additive, and its proportions on the total will be: Anhydrous Aluminum Trichloride O -2.5%, Anhydrous Calcium Chloride O -2.5%, Pentoxide of Phosphorus Anhydrous O -2.5%), and a second reagent that enhances the effect of the above, consisting of Calcium Oxide (CaO) (whose dosage is the remaining one up to 1000/0 of the total additive, that is between 2 and 10%) There is a third optional compound consisting of a pigment type Iron oxide (Fe203), whose mission is purely aesthetic (dosage that is between 0-1%). In the presence of water, the reactions that take place would be the following: CaCb dissolution reaction:
    CaCI2 (s) + H20 (I) ~ Ca2 + (aq) + 2Cr (aq)
    aH = -19.4 kcal / mol of CaCb Phosphorus Pentoxide Hydration: P205 (S) + 3H20 (I) ~ 2H3P04 (aq)
    aH = -55.7 kcal / mol of P20 5 Hydration of Calcium Oxide: CaO (s) + H20 (I) ~ Ca (OHh (s)
    aH = -15.6 kcal / mol of CaO The following neutralization reactions are also possible; although to a lesser extent since Ca (OHh is not solid but in solution: 2H3P04 (aq) + 3Ca (OH) 2 (S) - + Ca3 (P04) 2 (S) + 6H20 (I)
    aH = -77.1 cal / mol of Ca3 (P04) 2 H3P04 (aq) + Ca (OH) 2 (S), - + CaHP04e2H20 (s)
    aH = -32.8 kcal / mol of CaHP04e2H20 (s) Therefore, the global reactions that are possible with Phosphorus Petoxide would be the following: P20 5 (S) + 3CaO (s) - + Ca3 (P04) 2 (S)
    aH = -179.6 kcal / mol of Ca3P04 P20 5 (S) + 2CaO (s) + 5H20 (1) - + 2CaHP04e2H20 (S)
    aH = -152.4 kcal / 2 moles of CaHP04e2H20 Hydration of Aluminum Chloride: AICI3 (s) + 6H20 (I) - + AIClae6H20 (s)
    aH = -78.4 kcal / mol of AICI3 Neutralization reaction: 2AICI3 (aq) + 3Ca (OH) 2 (S) - + 3CaCb (aq) + 2AI (OH) 3 (s)
    aH = -42.4 kcal / 3 moles of CaCb In short, the overall reaction of Aluminum Chloride will be: 2AICI3 (s) + 3CaO (s) + 3H20 (I) ~ 3CaCI2 (aq) + 2AI (OHh (s)
    aH = -245.8 kcall3 moles of CaCb The exothermic reaction of the additive (AICIa, CaCb, P20 5 and CaO) together with the water -H20-in the mixture containing the aggregates, the RAP, the emulsion or the hydrocarbon binder, produces a increase of the temperature of the assembly that depends on the amount of additive dosed, being able to reach temperatures between 40 ° C and 90 ° C. Said temperature is sufficient to achieve a homogeneous envelope, to help remove water from the mixture and to facilitate optimal spreading and compaction of the mixture at the place of application, accelerating the curing process and considerably improving the mechanical characteristics with respect to a mixture. cold A good initial consistency is also achieved, as well as quick commissioning, similar to those offered by hot asphalt concrete. With the addition of more technical emulsions (based on hard bitumen), the best mechanical characteristics are obtained, achieving results of rigidity modules close to those of a hot mix in just 14 days of curing. The reactions described allow the realization of in situ recycling with emulsion by incorporating the additive (AICI3, CaCb, P20 5 and CaO) in the milling drum and
    mixed, which currently own the paving machines. With the consequent increase in temperature and improvement of the final mechanical properties, self-hardened recycled mixtures will be developed in situ with emulsion, a technique that offers a wide range of economic and environmental benefits derived from the reuse of products present at the application site. The use of this technique allows obtaining an exothermic mixture to obtain concrete
    asphalt tosplitfromRAPthatpresentstop
    features techniques thattheexecutedtotemperature
    ambient. DESCRIPTION OF THE PREFERRED EMBODIMENT FORM.
    The manufacturing process of asphalt concrete from the "Self-hardened" mixture is similar if we start from a cold recycled agglomerate (RAP) previously manufactured in a conventional manufacturing plant and then transferred to the site, as if we started from the RAP Milling in situ of the work itself. (one ). At the place of application, the additive dosage is added to the materials described above (AICIa, P20 5, CaCb, Fe203, together with CaO). In the case of the material incorporated into the work (prefabricated cold agglomerate) it is carried out in the mixer required for kneading. For him
    In case of recycling in sifu, it is introduced into the drum of the milling process. (2). After a few seconds of pre-mixing, the hydrocarbon binder (bitumen or emulsion) is added by means of the dosing device installed in the kneader or milling drum. (3). During mixing, the reagents contained in the additive react with the humidity present in the RAP, (the water content can be increased if necessary by direct incorporation or by its joint addition with the bituminous binder in the form of emulsion), producing an increase of the temperature that depends on the dosage used, but that will exceed 40 ° C for the proper functioning of the technique. With the reactions of dissolution and exothermic hydration that occur within the mixture during the mixing process, both in the mixer and in the milling drum, it is not only possible to increase the temperature, but also, the elimination of the water of the mixture, which allows a better behavior against the subsequent compaction process and an improvement in the mechanical properties of the mixture. This gives the asphalt concrete a cohesion and initial modulus that considerably shorten the time required for the commissioning of the treated roads, without the contribution of an external heat source.
    The materials used in the reaction tanks and in the components necessary for the transport of fluids between them, as well as the shapes and dimensions and accessory details, will be independent of the object of the invention, as long as they do not affect the essentiality.
    权利要求:
    Claims (1)
    [1]
    1.-Composition of the mixture for the manufacture of
     SELF-EXPANDED ASPHALT CONCRETE FROM RECOVERED PAVEMENT, consisting of the following components:
    - Calcium Oxide 2 -10 0A,
    - Aluminum Trichloride (Anhydrous) O -2.5 0A,
    - Calcium Chloride (Anhydrous) O -2.5 0A,
    - Phosphorus Pentoxide (Anhydrous) O -2.5 0A,
    - Iron Oxide (111) 0-1%
    - Hydrocarbon binder (bitumen, emulsion or binder
    synthetic) 2 -15 0A,
    - Recycled asphalt (RAP) 50 -90%
    - Water 0.5-5% The homogenization of this composition of the bituminous mixture in the percentages described produces an increase in temperature that confers properties similar to hot bituminous mixtures, without external energy input.
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    同族专利:
    公开号 | 公开日
    ES2583141B1|2017-09-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB2460707A|2008-06-02|2009-12-09|Aco Technologies Plc|Polymer concrete aggregate|CN109678436A|2019-01-01|2019-04-26|中国人民解放军63653部队|A kind of high temperature resistant Hearth Furnace self-leveling concrete pouring material|
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