JP2013072078A - Method for producing binder for pavement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a binder for pavement producible of a binder for pavement which is to be a substitute of an asphalt binder.SOLUTION: The method for producing a binder for pavement is provided, wherein the binder for pavement is obtained by polymerization of a raw material including at least one of plant-derived oil, oil wastes of plant-derived oil, edible animal oil and fat, and wastes of edible animal oil and fat through at least one of polymerization, condensation, and crosslinking. The plant-derived oil is preferably at least one of jatropha oil, rapeseed oil, coconut oil, soybean oil, corn oil, olive oil, camellia oil, and safflower oil.

Description

  The present invention relates to a pavement binder manufacturing method.

  As paving binders, asphalt binders such as petroleum products such as asphalt and modified asphalt obtained by adding various additives to asphalt are widely known (Non-patent Document 1).

Japan Society of Civil Engineers Earth Structure and Basic Committee, “Pavement Engineering” Editorial Committee, Pavement Engineering, Japan Society of Civil Engineers, May 25, 1995, 1st Edition, 2nd Edition, p. 162-177

  However, asphalt is a limited resource, so the development of alternatives is desired.

  Then, this invention makes it a subject to provide the binder production method for pavements which can manufacture the binder for pavements used as a substitute for an asphalt binder.

  As a means for solving the above-mentioned problems, the present invention comprises polymerizing and condensing a raw material containing at least one of a plant-derived oil, a waste oil of the plant-derived oil, an edible animal fat, and a waste product of the edible animal fat. And a pavement binder manufacturing method characterized in that a pavement binder is obtained by polymerizing by at least one of crosslinking.

According to such a configuration, at least one of polymerization, condensation, and cross-linking is performed on a raw material containing at least one of plant-derived oil, waste oil of the plant-derived oil, edible animal oil and fat, and waste of edible animal oil and fat. It is possible to obtain a pavement binder by polymerizing by p.
That is, a raw material containing plant-derived oil or the like is polymerized by at least one of polymerization, condensation, and cross-linking, whereby the high molecular weight is increased and the viscosity is increased, and a paving binder is obtained.

  In the method for producing a binder for paving, the plant-derived oil is preferably at least one of jatropha oil, rapeseed oil, coconut oil, soybean oil, corn oil, olive oil, coconut oil, and safflower oil.

  ADVANTAGE OF THE INVENTION According to this invention, the pavement binder manufacturing method which can manufacture the pavement binder used as a substitute for an asphalt binder can be provided.

It is a side view which shows the implementation condition of the binder manufacturing method for paving which concerns on this embodiment. It is a figure explaining the binder manufacturing method for pavements concerning this embodiment, (a) is oxidative polymerization by oxygen, (b) is dehydrogenative condensation by oxygen, (c), (d) is by sulfur (crosslinking agent). Shows cross-linking.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  The pavement binder manufacturing method according to the present embodiment is characterized in that a raw material G containing plant-derived oil or the like is polymerized by at least one of polymerization, condensation, and crosslinking to obtain a pavement binder.

<Raw material>
As the raw material G, at least one of plant-derived oil, waste oil of plant-derived oil, edible animal oil and fat, and waste of edible animal oil and fat can be used. That is, the raw material G can be any one of plant-derived oil, waste oil of plant-derived oil, edible animal oil and fat, edible animal oil and fat waste, or a mixture of these, that is, these Some combinations can also be used.

Plant-derived oil is oil collected from plants. For example, at least one of jatropha oil, rapeseed oil, coconut oil, soybean oil, corn oil, olive oil, coconut oil, safflower oil (safflower oil) can be used. . Other types of plant-derived oils can also be used as appropriate.
The waste oil of plant-derived oil is the above-described waste oil of plant-derived oil. That is, the waste oil of plant-derived oil includes, for example, waste oil of edible plant-derived oil such as rapeseed oil, corn oil, olive oil (waste edible oil of plant-derived oil).
The edible animal fat is lard (pig fat), for example.
The edible animal oil waste is, for example, lard (pig fat) waste.

<Polymerization-polymerization method>
As a polymerization method for polymerizing the raw material G, for example, an oxidative polymerization method can be employed.
Specifically, as shown in FIG. 1, the raw material G is put in a suitable container 11 and stirred by a stirring device 13 while being heated by a heater 12 (a heating device such as a mantle heater). Then, oxygen or air containing oxygen (gas) is blown into the raw material G through the oxygen introduction pipe 14 while heating and stirring in this way. Then, as shown in FIG. 2A, the oxidative polymerization reaction proceeds, that is, the low molecular double bond contained in the raw material G is broken, and the low molecule is bonded via an oxygen atom, thereby becoming a polymer. To do.

In this case, as the contact area between the raw material G and oxygen increases, the progress rate of the oxidative polymerization reaction increases, so that, for example, the flow rate of oxygen blowing is increased, or a plurality of oxygen introduction pipes 14 are used. It is preferable to do.
The same applies to the case of polymerizing by a condensation method and a crosslinking method described later.

In this case, as the temperature of the raw material G increases, the progress rate of the oxidative polymerization reaction increases.
The same applies to the case of polymerizing by a condensation method and a crosslinking method described later.

In this case, the oxidation polymerization reaction can be promoted by mixing the catalyst 15 in the raw material G. Such a catalyst 15 can be appropriately selected from copper, iron, manganese, chromium, nickel and the like.
The same applies to the case of polymerizing by a condensation method and a crosslinking method described later.

In this case, the oxidative polymerization reaction can be promoted by irradiating the raw material G with light (ultraviolet rays, visible light, etc.) with an appropriate irradiation device 16. In addition, since the energy becomes large as the wavelength of a light beam becomes short, the said oxidation polymerization reaction can further be accelerated | stimulated. In addition, by irradiating light in this way, radicals can be generated in the raw material G, and the raw material G can be polymerized by radical polymerization.
The same applies to the case of polymerizing by a condensation method and a crosslinking method described later.

<Polymerization-Condensation>
As a condensation method for polymerizing the raw material G, for example, a dehydrogenation condensation method can be employed.
Specifically, as shown in FIG. 1, the raw material G is put in a suitable container 11 and stirred while heating. Then, oxygen or oxygen-containing air (gas) is blown into the raw material G while heating and stirring in this way. Then, as shown in FIG. 2 (b), the dehydrogenative condensation reaction proceeds, that is, the hydrogen at the terminal of the low molecule contained in the raw material G is desorbed, and this terminal is bonded via an oxygen atom, Polymerize.

<Polymerization-crosslinking>
As a crosslinking method for polymerizing the raw material G, for example, a method of adding a crosslinking agent such as sulfur to the raw material G and crosslinking low molecules contained in the raw material G can be adopted (FIG. 2 (c), FIG. 2 (d)).

<Pavement binder>
The pavement binder obtained by polymerizing the raw material G in this way is not depleted because the plant-derived oil or the like is used as the raw material G. And since the following effect is acquired, it can be used as a substitute for an asphalt binder.
The pavement binder is polymerized, and thus has a temperature sensitivity, that is, a characteristic that the viscosity decreases as the temperature increases, like general pavement asphalt. Further, the pavement binder has stress relaxation properties, that is, has an appropriate viscoelasticity even at a low temperature, and does not easily generate a low-temperature crack.

  And since the binder for paving has the same characteristics as general paving asphalt, the mixture for paving is manufactured by mixing with aggregate (natural aggregate, artificial aggregate), glass cullet, wood fiber, soil, etc. And pavement can be constructed.

  Moreover, since such a paving binder has a transparency equal to or higher than that of general decoloring asphalt, it can be suitably used for light paving and colored paving.

Moreover, the adhesiveness to aggregate can also be improved by adding tackifiers, such as petroleum resin, to such a pavement binder.
Further, by adding a modifier such as rubber or elastomer to such a pavement binder, the temperature sensitivity, flow resistance, and low temperature brittleness can be improved.

  In addition, by emulsifying such a paving binder into an emulsion, it can be used at room temperature. Such an emulsion can be used as, for example, a tack coat or a binder for a room temperature mixture.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, A design change can be carried out suitably.

  Hereinafter, based on an Example, this invention is demonstrated further more concretely.

700 mL of rapeseed oil (canola oil, manufactured by Ajinomoto Foods Co., Ltd.) as raw material G is put into a 1000 mL beaker (container 11), and air is blown at 285 (cc / min) while heating to 200 ° C. with a heater 12, and a stirrer 13 was stirred for 85 hours to oxidize the rapeseed oil. As a result, the rapeseed oil was polymerized (increased in viscosity) and was in a gel state in a normal temperature range to a high temperature range.
The time required for polymerization (oxidation time, stirring time) is as follows: (1) oxygen is blown in place of air, (2) the temperature is higher than 200 ° C., and (3) irradiation with ultraviolet rays or the like. It is thought that it can be further shortened. However, it is good also as a structure which performs only one part instead of all of (1)-(3).

  The rapeseed oil thus polymerized was used as a binder and mixed with the aggregate for the mixture (dense particle asphalt mixture (13)) to prepare a Marshall specimen.

  The Marshall specimen thus prepared was subjected to a Marshall stability test under the conditions of air-drying 20 ° C. (conditions of normal temperature and dry state, conditions in which the Marshall specimen is not cured in water of 60 ° C.). The Marshall stability was 11.0 (KN), and the flow value was 42 (1/10 mm). Thereby, it is considered that the polymerized rapeseed oil can be suitably used as, for example, a binder for sidewalk pavements.

G Raw material 11 Container 12 Heater (heating means)
13 Stirring device 14 Oxygen introduction pipe 15 Catalyst 16 Irradiation device

Claims (2)

A pavement binder obtained by polymerizing a raw material containing at least one of plant-derived oil, waste oil of the plant-derived oil, edible animal oil and fat, and waste of the edible animal oil and fat by at least one of polymerization, condensation and crosslinking A method for producing a binder for paving, characterized in that The pavement binder manufacturing method according to claim 1, wherein the plant-derived oil is at least one of jatropha oil, rapeseed oil, coconut oil, soybean oil, corn oil, olive oil, coconut oil, and safflower oil.

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