KR102136231B1 - Mastic asphalt mixture and construction method thereof - Google Patents

Abstract

The present invention relates to a coarse aggregate mastic asphalt mixture that can be used for new construction, repair and reinforcement of riprap breakwaters such as ports. The coarse aggregate mastic asphalt mixture according to a building method thereof contains 8 to 15 wt% of straight asphalt having a penetration index of 60 to 80, 20 to 30 wt% of a filler containing at least one of limestone powder, slag fine powder, and cement, 30 to 40 wt% of fine aggregate having a particle diameter of 0.074 mm or more and less than 2.5 mm, and 20 to 30 wt% of a coarse aggregate having a particle diameter of 2.5 mm or more and less than 20 mm.

Description

A coarse aggregate mastic asphalt mixture for the construction and maintenance of port sandstone and its construction method{MASTIC ASPHALT MIXTURE AND CONSTRUCTION METHOD THEREOF}

The present invention relates to a coarse aggregate mastic asphalt mixture that can be used for the construction, repair and reinforcement of sandstone materials such as ports, and a construction method therefor.

Ports, etc. are provided with structures that break waves on the slopes, which are called stony stone (or stiffeners). These sandstones are formed of trapezoidal structures by stacking rocks or sofa blocks, and have the advantage of being easy to apply to soft submarine ground, and convenient to construct, repair, and maintain.

Existing breakwater or long-lived sandstone for a long time has passed through the core stone by seawater, causing cavities, or sand into the port with seawater as a sandstone. As a technique to prevent the discharge of landfill soil, a method of grouting after puncturing the sandstone and the ground to fill the inner cavity or laying a filter stone and filter mat on the surface of the existing sandstone was utilized. Particularly, as a method of filling the cavity, a quick-setting agent can be mixed and applied to concrete or mortar, but there are problems such as loss of cement components due to salt contained in seawater and environmental problems as well as news of mechanical properties.

On the other hand, sand mastic was first introduced and introduced in the port and fishbowl design standards (1993) issued by the government, but there were no specifics on the specific mixing ratio, mixing temperature, heating and transportation method, pouring method, etc. No case has been applied in Korea until the present time, about 30 years have passed. In addition, there is a problem that there is no division according to various application purposes, and there is no standard for quality control of materials.

On the other hand, Patent No. 10-0333097 (April 06, 2002) proposes a technology to prevent the discharge of landfill soil through a weight block and a chain for binding, but it is limited to realize the prevention of a fundamental landfill discharge. There is also an invention that is somewhat distanced from the invention using mastic asphalt.

The present invention is to solve the above problems, and provides a mixing ratio and a construction method of a coarse aggregate mastic asphalt mixture according to the purpose of use applied to a sandstone, and furthermore, dominates the effect when the coarse aggregate mastic asphalt mixture is applied on site. It is an object of the present invention to provide a method of determining the temperature of a coarse aggregate mastic asphalt mixture according to the depth of injection during construction by quantitatively measuring the viscosity.

The coarse aggregate mastic asphalt mixture according to the present invention for the purpose of solving the above problems is 8 to 15% by weight of straight asphalt with a penetration of 60 to 80, and a filler comprising at least one of limestone powder, fine slag powder, and cement 20 to 30% by weight, and 30 to 40% by weight of fine aggregate having a particle diameter of 0.074 to 2.5mm (less than), and 20 to 30% by weight of coarse aggregate having a particle diameter of 2.5 to 20mm (less than).

In addition, the repair method of the port sandstone according to the present invention is 8 to 15% by weight of straight asphalt with a penetration degree of 60 to 80, 20 to 30% by weight of the filler, and fine aggregate of 30 to 40 with a particle diameter of 0.074 to 2.5mm (less than). A manufacturing step for preparing a coarse aggregate mastic asphalt mixture by heating and mixing 20% to 30% by weight of coarse aggregate having a weight percentage and a particle diameter of 2.5 to 20mm (less than) at 130 to 190°C, and the coarse aggregate mastic asphalt mixture Pour step of injecting into the cavities of the first surface, the inner cavity, or both.

In addition, the pouring step, using an injection device including a hopper having an inlet at the top and a narrower width toward the lower side, a pipe provided at the bottom of the hopper and having a discharge port at the bottom and a heating means provided at the pipe. However, the viscosity of the coarse aggregate mastic asphalt mixture is calculated by measuring the time at which the coarse aggregate mastic asphalt mixture is discharged to the outlet, and the coarse aggregate mastic asphalt mixture is heated through the heating means. By controlling the pouring temperature, it is characterized in that the coarse aggregate mastic asphalt mixture is poured at a preset viscosity.

In addition, the pouring temperature is characterized in that 60 ~ 240 ℃.

The present invention having the above configuration, steps and features provides a mixing ratio and a construction method of the coarse aggregate mastic asphalt mixture according to the purpose of use applied to the sandstone, and furthermore, the influence of the coarse aggregate mastic asphalt mixture upon on-site construction is controlled. It provides a method for determining the temperature of the coarse aggregate mastic asphalt mixture according to the depth of injection during construction by quantitatively measuring the viscosity.

In addition, by filling the pores around the coated stone with the coarse aggregate mastic asphalt mixture, the pores of the coated stone can be filled to prevent leakage of landfill soil. In addition, stability can be secured through the unified behavior of the coated stone through filling of the pores of the coated stone. In particular, this provides an effect of using a coated stone smaller than the required specification in cases where it is difficult to obtain a coated stone that meets the specifications used for the sandstone due to local circumstances or is uneconomical.

In addition, when a cavity occurs inside the sandstone, filling the coarse aggregate mastic asphalt mixture into the interior cavity can prevent the leakage of landfill soil, which is more economical and eco-friendly than the case of using concrete mortar. It has the advantage of being possible.

1 is a first embodiment of a method for preventing landfill soil leakage according to the present invention.
2 is a second embodiment of the present method.
3 to 4 is an embodiment of the injection device according to the present invention.

The present invention can be applied to a variety of changes and can have a variety of forms, the implementation (態樣, aspect) (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosure form, it should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

The terminology used herein is only used to describe a specific embodiment (sun, 態樣, aspect) (or embodiment), and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as ~include~ or ~consist of~ are intended to designate the existence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and one or more other features. It should be understood that the presence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

~ 1 ~, ~ 2 ~, etc. described in this specification will refer only to distinguish between different components, and are not limited to the order in which they are manufactured, and the names in the detailed description and claims of the invention It may not match.

The present invention relates to a coarse aggregate mastic asphalt mixture that can be used for the construction, repair, and reinforcement of sandstone materials such as ports, and a construction method thereof (repairing methods of port sandstone materials).

Hereinafter, with reference to the accompanying drawings, a coarse aggregate mastic asphalt mixture according to the present invention (hereinafter referred to as the present composition) and a harbor sandstone repair method (hereinafter referred to as the present method) will be described in detail.

The composition is a coarse aggregate mastic asphalt mixture used to fill surface voids or internal cavities 5 of the sandstone (1) installed in a port, etc., and to prevent sediment from leaking into the voids. And fillers, and aggregates.

First, straight asphalt is a by-product of crude oil processing, and has bituminous as its main component, and has great elongation and excellent adhesiveness and waterproofness, so it is often used as a packaging material.

It is preferred that the straight asphalt has a penetration degree of 60 to 80, and its preferable content is 8 to 15% by weight based on the total weight of the coarse aggregate mastic asphalt mixture. For example, when the content of straight asphalt is less than 8% by weight, it is difficult to form an asphalt mastic, and when it exceeds 15% by weight, the composition has a problem of being too soft.

Next, the filler is used as a filler in the coarse aggregate mastic asphalt mixture, and any filler that can be used in an asphalt mixture such as limestone powder, slag fine powder, cement, etc. may be used as the filler, preferably limestone powder, It may include at least one of slag fine powder and cement.

Such a filler may contain 20 to 30% by weight, based on the total weight of the coarse aggregate mastic asphalt mixture. If the content of the filler is less than 20% by weight, it is difficult to make an asphalt mastic, and if it exceeds 30% by weight, the viscosity It can increase too much.

Next, aggregate is another important factor constituting the mastic asphalt, 50 to 70% by weight relative to the total weight of the coarse aggregate mastic asphalt mixture can be used.

In particular, such aggregates may be classified into fine aggregates, coarse aggregates, and very coarse aggregates depending on the particle size. The above-described filler may be limited to those having a particle size of less than 0.074 mm, and the fine aggregates having a particle size of 0.074 to 2.5 (less than). It may be limited to mm, and the coarse aggregate may be limited to those having a particle diameter of 2.5 to 20 (less than) mm, and the coarse aggregate may be limited to having a particle diameter of 20 mm or more.

In the above, fine aggregate may be used such as stone or crushed sand, slag aggregate, and the preferred amount thereof is 30 to 40% by weight, and when less than 30% by weight is used, the physical properties of the coarse aggregate mastic asphalt mixture are lowered, If it exceeds 40% by weight, the mixture may not form a mastic.

In addition, all aggregates used in asphalt can be applied to the coarse aggregate, and the preferred amount thereof is 20 to 30% by weight, and if it is less than 20% by weight, durability is deteriorated. Since this is impossible, it is preferable that the amount used is controlled within the above range.

Particularly in the above, when the cavity 5 to be filled is very wide, a very coarse aggregate of 20 mm or more may be used, and when the particle size is 50 mm or more, there is a problem that the surface of the aggregate is too coarse to form a smooth surface after construction. As for the limitation, it may be preferable to be 20 mm to 50 mm.

The coarse aggregate mastic asphalt mixture is filled in the surface voids of the masonry agent (1), the internal cavity (5), and the like, to improve the durability of the masonry agent (1), and also to prevent the soil layer of the masonry agent (1) from passing through. Formation prevents the landfill soil from leaking.

On the other hand, the present composition is characterized in that it may further include a functional additive 3% by weight compared to the total weight of the coarse aggregate mastic asphalt mixture. Functional additives may be included instead of reducing the content of the fillers described above.

These functional additives, compared to 10 parts by weight of acrylic urethane, 2 to 3 parts by weight of polyalkylacrylate, 2 to 3 parts by weight of ethylene-acrylic acid, 2 to 3 parts by weight of tetrafluoroethylene, 1 to 2 parts by weight of polyethylene oxide, vinyl trime Characterized in that it may include 0.1 to 1 part by weight of oxysilane and 0.1 to 1 part by weight of titanium dioxide.

Acrylic urethane is used to improve adhesion, strength and durability, and each composition of functional additive is determined based on 10 parts by weight of this acrylic urethane.

Poly alkyl acrylate is used to improve the bending toughness and to improve flexibility, the preferred content is 2 to 3 parts by weight. When used in less than 2 parts by weight, the improvement effect is negligible, and when it is used in excess of 3 parts by weight, material separation occurs and workability deteriorates.

Ethylene-acrylic acid is added as a ductility imparting polymer, and its content is preferably 2 to 3 parts by weight. When used in less than 2 parts by weight, the effect of improving ductility is insignificant, and when it is used in excess of 3 parts by weight, the viscosity is excessively high and workability is deteriorated.

Tetrafluor ethylene is added to improve elongation and strength, and its content is preferably 2 to 3 parts by weight. When used in less than 2 parts by weight, the improvement effect is negligible, and when used in excess of 3 parts by weight, there is a problem that economic efficiency is deteriorated.

Polyethylene oxide is added to improve workability and durability, and its content is preferably 1 to 2 parts by weight. When added in less than 1 part by weight, the effect of improving durability is negligible, and when added in excess of 2 parts by weight, there is a problem that material separation occurs.

Vinyl trimethoxysilane is added as an adhesion promoter, and its content is preferably 0.1 to 1 part by weight. When used in an amount of less than 0.1 part by weight, adhesion to the substrate may be insufficient, and when used in excess of 1 part by weight, a problem of delay in curing occurs.

Titanium dioxide is added to improve the adhesion performance, in particular, it was adopted in that it is an eco-friendly component that is harmless to the human body, and its content is preferably 0.1 to 1 part by weight. If it is less than 0.1 part by weight, it is difficult to obtain the required adhesion strength, and if it is more than 1 part by weight, there is a problem that properties are changed by affecting other compositions.

Hereinafter, with reference to the accompanying drawings, the construction method of the mastic asphalt mixture according to the present invention (the method for preventing the emulsification of landfill from the sandstone, hereinafter, this construction method) will be described.

In the description of the present invention, the term'construction method' may be interpreted as a'construction method' or'method', which corresponds to a term widely used in the field by a person skilled in the art.

The present method largely includes a manufacturing step of preparing a coarse aggregate mastic asphalt mixture and a pouring step of pouring the coarse aggregate mastic asphalt mixture. In addition, it may further include a transport step of transporting the coarse aggregate mastic asphalt mixture prepared prior to the pouring step to a construction site, but this is not a key matter in the scope of the present invention, and is a self-evident fact, and is predicted by a person skilled in the art. It is within range.

For each step, specifically described, the manufacturing step is a step of preparing the above-described composition, as described above, 8 to 15% by weight of straight asphalt having a penetration of 60 to 80% and 20 to 30% by weight of a filler, fine aggregate 30 to 40% by weight, 20 to 30% by weight of coarse aggregate is mixed by heating at 130 to 190 ℃ to prepare a coarse aggregate mastic asphalt mixture.

In the above manufacturing step, the mixing temperature of the present composition is preferably limited to 130 to 190°C. When it is less than 130°C, mixing between the materials is difficult, and when it exceeds 190°C, the viscosity of the straight asphalt evaporates to increase the viscosity. In particular, the maximum value of the above range should never be exceeded.

The coarse aggregate mastic asphalt mixture prepared in the above manufacturing step can be produced in a conventional asphalt plant, and in particular, when very coarse aggregate (20-50 mm) is used, the coarse aggregate is preheated and heated and stirred in a rotary drum mixer. Can be produced.

Next, the transport step is a step of transporting the manufactured coarse aggregate mastic asphalt mixture to a construction site using a mobile plant, and apparently, the construction site will be a squar stone (1).

In this transport step, the coarse aggregate mastic asphalt mixture is preferably stored, heated, stirred and transported through a mobile plant (cooker), in which case a coarse aggregate mastic asphalt mixture with good fluidity can be obtained even upon arrival at the site. .

Next, the pouring step is a step of injecting the manufactured or manufactured and transported coarse aggregate mastic asphalt mixture 30 into the surface pores of the masonry 1, the inner cavity 5, or both. ) Is used to fill the surface voids, when it is used to fill the internal voids 5 when used to fill the internal voids 5 of the lithite (1), if you want to fill both It is injected into both.

More specifically, according to the first embodiment of injecting the coarse aggregate mastic asphalt mixture 30 into the surface pores of the sandstone 1, as shown in FIG. 1, the coarse aggregate mastic asphalt mixture 30 By filling the voids around the cover stones 2 positioned between the seabed surface 6 and the sea surface 7, the voids in the cover stones 2 can be filled to prevent leakage of landfill soil. In addition, it is possible to secure stability through the unified behavior of the covering stone 2 through filling the voids of the covering stone 2. In particular, this provides an effect of using a coated stone 2 smaller than the required specification in cases where it is difficult or impossible to obtain the coated stone 2 that meets the specifications used for the squaring stone 1 due to local circumstances. In FIG. 2, it can be seen that the voids around the covering stone 2 were filled with a coarse aggregate mastic asphalt mixture 30 to form a loss preventing layer 4 on the surface of the stony stone 1.

Next, according to the second embodiment injecting the coarse aggregate mastic asphalt mixture 30 into the inner cavity 5 of the masonry 1, as shown in FIG. 2, the seabed surface 6 and the sea surface ( 7) When the cavity (5) occurs in the interior of the sandstone (1), the coarse aggregate mastic asphalt mixture (30) is filled in the interior cavity (5) to prevent the discharge of landfill soil. There is, compared to the case of using concrete mortar, economical and eco-friendly construction is possible. In particular, in the prior art, the construction of filling the cavity 5 in the form of grouting after drilling in the ground was made, which is inconvenient to dismantle the upper structure 8 provided on the top of the stony stone 1 as shown in FIG. 2. On the other hand, this method has the advantage that it can be installed immediately without dismantling the upper structure (8).

According to an embodiment of the present invention, the injection of the above-described coarse aggregate mastic asphalt mixture 30 may be performed by an injection device 9 (hereinafter, the present device 9) unique to the present invention. Since the features of 9) may soon become features of the method, the features and effects of the method will be described as the features and effects of the apparatus 9 are disclosed in the following description.

3 to 4, the apparatus 9 includes a hopper 91, a pipe 92, and heating means 93 from the top, and further includes a metering means and a nozzle 95 It is characterized by being able to.

For each configuration, the hopper 91 is a configuration in which mastic asphalt is first introduced, and has a structure in which an inlet is provided at an upper portion and a width becomes narrower toward the lower side. The structure of the upper and lower strait allows the drop of the injected mastic asphalt to be made more smoothly.

The pipe 92 has a configuration in which the inputted mastic asphalt moves, and is provided at the bottom of the hopper 91 and has an outlet at the bottom. Obviously, the outlet of the pipe 92 is arranged adjacent to the inner cavity 5 or the surface void of the sandstone 1.

The heating means 93 is a configuration provided to adjust the viscosity of the coarse aggregate mastic asphalt mixture by moving through the pipe 92, and the workability of the coarse aggregate mastic asphalt mixture depends on the viscosity. It is subject to the mixing ratio and the mixture temperature, and since the mixing ratio is a fixed factor as described above, it is possible to control the viscosity of the formulation through temperature control. In general, since the room temperature is significantly lower than the mixing temperature of the mixture, the coarse aggregate mastic asphalt mixture has to be cooled, and the heating means 93 controls the viscosity of the mastic asphalt by heating the coarse aggregate mastic asphalt mixture. Is to do.

As shown in Figure 4, the heating means 93 may be composed of a heating coil provided inside the pipe 92, preferably disposed in a form embedded between the outer surface and the inner surface of the pipe 92 Can be.

In addition, the apparatus 9 may further include a metering container 94 provided at the lower portion of the pipe 92 and a nozzle 95 provided at a side of the pipe 92, wherein the metering container 94 is It can be provided separately as a separate object from the pipe 92 and accommodates the coarse aggregate mastic asphalt mixture discharged to the outlet while measuring the amount. This can be used to compare the amount of the mixture discharged into the pipe 92 with the amount of the mixture injected into the hopper 91 in the precise implementation described below. In addition, the nozzle 95 serves to open and close the outlet.

The above-described device 9 calculates the viscosity of the coarse aggregate mastic asphalt mixture by measuring the time at which the coarse aggregate mastic asphalt mixture is discharged to the outlet, through which the mixture diffuses by viscosity in water. It can be measured or calculated, and as a result, more precise landfill discharge prevention construction is realized.

In addition, by heating the coarse aggregate mastic asphalt mixture through the heating means 93 to control the pouring temperature, the coarse aggregate mastic asphalt mixture is poured with a preset viscosity, and this also enables more precise landfill sediment leakage prevention construction. do.

As a result of repeated experiments, it is preferable that the pouring temperature of the present composition is 60 to 240°C. If it is less than the above range, the viscosity is greatly increased, so that pouring is impossible, and if it exceeds the above range, energy cost is excessively spent, which is not economical. The more preferable pouring temperature is 70-220 degreeC.

In addition, in the case of the discharge pressure of the coarse aggregate mastic asphalt mixture, the density of the mixture is about 2 times higher than that of water, so it is not significantly affected during construction, but in the case of rapid construction or a wide range of construction, it is possible to improve the workability through pressurization. have. In the present invention, there is no particular limitation on the method of pressurization.

The present invention described above with reference to the accompanying drawings can be variously modified and changed by a person skilled in the art, and such modifications and variations should be interpreted as being included in the scope of the present invention.

1: Sandstone 2: Cover stone
30: coarse aggregate mastic asphalt mixture 4: anti-lost layer
5: cavity 6: bottom
7: Sea level 8: Lettuce structure
9: Injection device (this device)
91: hopper 92: pipe
93: heating means 94: measuring barrel
95: nozzle

Claims (4)

8 to 15% by weight of straight asphalt with a penetration of 60 to 80;
20 to 30% by weight of a filler containing at least one of limestone powder, fine slag powder, and cement;
30 to 40% by weight of fine aggregate with a particle size of 0.074 to 2.5 mm (less than); And
20 to 30% by weight of coarse aggregate having a particle diameter of 2.5 to 20 mm (less than);
Including,
The functional additive further comprises 3% by weight,
The functional additive is compared to 10 parts by weight of acrylic urethane, 2 to 3 parts by weight of polyalkylacrylate, 2 to 3 parts by weight of ethylene-acrylic acid, 2 to 3 parts by weight of tetrafluoroethylene, 1 to 2 parts by weight of polyethylene oxide, vinyl trime 0.1 to 1 part by weight of oxysilane and 0.1 to 1 part by weight of titanium dioxide,
A coarse aggregate mastic asphalt mixture characterized by forming a barrier layer that does not pass through the sediment of the sandstone because it is filled in the internal cavity and the surface voids of the sandstone.
8 to 15% by weight of straight asphalt with a penetration of 60 to 80%, 20 to 30% by weight of filler, 30 to 40% by weight of fine aggregate with a particle size of 0.074 to 2.5mm (less than), coarse with a particle size of 2.5 to 20mm (less than) A preparation step of heating and mixing 20 to 30% by weight of aggregate and 3% by weight of functional additive at 130 to 190°C to prepare a coarse aggregate mastic asphalt mixture; And
A pouring step of injecting the coarse aggregate mastic asphalt mixture into the surface pores, internal cavities, or both of the sandstone;
Including,
The pouring step,
A hopper having an inlet on the top and a narrower width toward the lower side, an injection device including a pipe provided at the bottom of the hopper and having an outlet at the bottom and a heating means provided on the pipe,
The viscosity of the coarse aggregate mastic asphalt mixture is calculated by measuring the time at which the coarse aggregate mastic asphalt mixture is discharged to the outlet,
By heating the coarse aggregate mastic asphalt mixture through the heating means to control the pouring temperature, the coarse aggregate mastic asphalt mixture is poured with a preset viscosity,
The pouring temperature is 60 ~ 240 ℃,
Filled in the pores of the surface and inner cavity of the sandstone, it forms a barrier layer that does not pass through the sandstone.
The functional additive is compared to 10 parts by weight of acrylic urethane, 2 to 3 parts by weight of polyalkylacrylate, 2 to 3 parts by weight of ethylene-acrylic acid, 2 to 3 parts by weight of tetrafluoroethylene, 1 to 2 parts by weight of polyethylene oxide, vinyl trime A method for preventing landfill discharge from a sandstone comprising 0.1 to 1 part by weight of oxysilane and 0.1 to 1 part by weight of titanium dioxide. delete delete

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