KR101876434B1 - Water-permeable Pavement Composition Using Polymer, Water-permeable Road Pavement, And Construction Method thereof - Google Patents

Abstract

The present invention relates to a drainage road pavement composition capable of improving the separation and crack resistance of aggregates, which comprises: 44 to 47 wt% of aggregate having a particle size of 13.1 to 20 mm; 4.5 to 5 wt% of stone powder; 2 to 7 wt% of a polymer binder; and the remainder of the aggregate having a particle size of 10 to 13 mm.

Description

Technical Field [0001] The present invention relates to a pavement composition, a water-permeable pavement composition, and a construction method thereof,

The present invention relates to a road pavement, and more particularly, to a pavement composition having an environmentally-friendly pavement constituted by incorporating a polymer binder into an aggregate and constituting a surface layer of a road.

The pavement pavement is a pavement which is advantageous for improving the slip resistance due to the rapid drainage of rainwater and securing the visibility of the road surface during day and night. Usually, the pavement asphalt mixture containing the asphalt binder in the aggregate is used.

The pavement asphalt mixture is a porous asphalt mixture with increased porosity and porosity by decreasing the fine aggregate ratio compared to the wheat-size asphalt mixture. The pavement asphalt mixture is packed on the surface of the road pavement and the road surface flows to the surface of the impermeable middle layer of the lower pavement. .

The drainage asphalt pavement has drainage function to improve the driving safety of the vehicle and to improve the surrounding environment due to the low noise effect.

Such a drainage asphalt mixture can achieve various functions as described above, but the design and the road structure for drainage as well as materials must be taken into consideration. Failure to do so may lead to premature cracking and breakage of the packaging.

As the maximum aggregate size increases, drainage performance and resistance to plastic deformation increase, but segregation and cracking resistance of aggregate can be lowered. On the contrary, when the maximum aggregate size is small, the noise is reduced, the aggregate separation and cracking resistance is increased, but the drainage performance and plastic deformation resistance may be lowered.

Generally, asphalt binders with high performance grade (eg, PG76-22, PG82-22) are used to improve these properties. However, since the mixture must be produced and applied at a high temperature during production and construction, If quality control is not done, breakage can easily occur.

Particularly, due to the characteristics of asphalt, plastic deformation occurs at high temperature and low speed conditions, and the porosity due to the plastic deformation is reduced, and the drainage performance is remarkably deteriorated.

Registration No. 10-1109537 (Registered on January 18, 2012) Registration No. 10-1477055 (registered on December 22, 2014) Registration No. 10-1471446 (Registered on December 4, 2014)

It is an object of the present invention to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method of manufacturing a pellet, which can produce and construct the pellet at room temperature without heating at high temperature, maximize the specific gravity of the coarse aggregate, To maximize permeability by maximizing the number of voids and to increase the bonding force between aggregates by using a polymer binder, thereby improving the separation and cracking resistance of the aggregate. And a method of constructing the same.

The pavement composition according to the present invention is characterized in that it comprises 44 to 47% by weight of a first aggregate having a particle size of 13.1 to 20 mm, 4.5 to 5% by weight of a starch, 2 to 7% by weight of a polymer binder, And the second aggregate of the remainder.

The polymer binder is a two-component binder consisting of a base and a curing agent. The polymer binder is selected from the group consisting of a polyether polyol, a polyester polyol, a polyether polyol and a polyester polyol Wherein one or more selected from the group consisting of a defoaming agent, a UV stabilizer, an antioxidant, a flame retardant, and a pigment is mixed with a catalyst selected from a metal catalyst and an amine catalyst, and the curing agent is an isocyanate having an NCO reactor, Or a prepolymer prepared by synthesizing Polymeric MDI with a polyether polyol or a polyester polyol or a polyol obtained by mixing a polyether polyol and a polyester polyol. The mixing ratio of the above-mentioned subject to the curing agent is Having a weight ratio of 100: 50 to 90 It is.

Also, the pavement body of the present invention is a pavement body having a surface layer comprising a pavement composition with drainability according to the present invention; And a protective layer formed on the surface layer and composed of a composition obtained by mixing the fine aggregate having a particle size of 2 to 5 mm with the same polymer binder as that of the polymer binder of the package composition with the purity according to claim 1 or 2 .

The protective layer may be laminated to a thickness of 20 to 30 mm.

And the surface layer may be laminated on a wheat grain packing layer made of an asphalt mixture in which an aggregate is mixed with an asphalt binder.

A method for constructing a pavement with drainability according to the present invention includes the steps of laying an asphalt mixture mixed with aggregate on a road surface and compaction to form a pavement layer; Forming a surface layer on the milky granular packing layer by laying the package composition according to any one of claims 1 to 3 in an environmentally-friendly manner; And forming a protective layer by layering a fine-grained material having a particle size of 2 to 5 mm on the surface layer with a polymeric binder similar to that of the polymeric binder of the package composition in a pourable property according to claim 1 or 2; . ≪ / RTI >

The protective layer is preferably 20 to 30 mm thick.

According to the present invention, since a mixture of coarse aggregates of a mixture of a first aggregate having a particle size of 13.1 to 20 mm and a second aggregate having a particle size of 10 to 13 mm is used and a fine aggregate for filling the pores of the coarse aggregate is not used, Performance and indirect tensile strength can be achieved at the same time.

That is, the existing drainage asphalt mixture is cracked between the aggregate and the aggregate because the strength of the asphalt binder is low. However, in the case of the two-pack type polymer binder used for the package composition of the present invention, the strength of the binder is higher than that of the aggregate, And the tensile strength of the aggregate can be increased to increase the bonding force between the aggregates instead of the fine aggregate.

In addition, since the polymer binder is used without using an asphalt binder as a binder, production and construction at room temperature can be effected without heating at high temperature.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of a pavement in accordance with an embodiment of the present invention.
2 is a flowchart illustrating a method of constructing a pavement in accordance with an embodiment of the present invention.
3 is a graph showing the results of an indirect tensile strength test on three specimens made of the package composition according to the present invention.
FIG. 4 is a photograph showing the result of acceleration test of a truck load against a pavement with drainage using a conventional drainage asphalt mixture.
FIG. 5 is a photograph showing the result of accelerating the packing load of the truck against the pavement with drainability according to the present invention.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory only and are not restrictive of the invention, as claimed, and it is to be understood that the invention is not limited to the disclosed embodiments.

Hereinafter, with reference to the accompanying drawings, a pavement composition with environmental friendliness, a pavement using pavement using the pavement composition, and a construction method thereof will be described in detail with reference to the following embodiments. Like numbers refer to like elements throughout the drawings.

The pavement composition according to the present invention is a road pavement composition that forms a surface layer of a road by being laid on a road. The pavement composition comprises 44 to 47% by weight of an aggregate having a particle size of 13.1 to 20 mm (hereinafter referred to as a first aggregate) 5 to 5 wt%, polymer binder 2 to 7 wt%, and a balance aggregate having a particle size of 10 to 13 mm (hereinafter referred to as second aggregate).

The first aggregate has a mixing ratio of 44 to 47% by weight with respect to the road pavement composition as a whole, and significantly more than 20 to 30% by weight of a aggregate having a maximum particle diameter of 13 mm contained in a conventional drainage asphalt mixture. Therefore, the voids between the aggregates can be increased to improve the permeability.

The second aggregate having a particle size of 10 to 13 mm forms the void together with the first aggregate having the particle size of 13.1 to 20 mm. The first aggregate having a particle size of 13.1 to 20 mm and the second aggregate having a particle size of 10 to 13 mm are mixed together in the polymer binder when the first aggregate having a particle size of 13.1 to 20 mm is singly mixed into the polymer binder When the pavement was poured, it was confirmed that the indirect tensile strength was increased without changing the permeability.

The stone and the polymer binder function to tightly bond the first aggregate and the first aggregate, the second aggregate and the second aggregate, and the first aggregate and the second aggregate. In particular, the polymer binder acts to increase the bonding force between aggregates without using fine aggregates.

The polymer binder for this purpose is a two-pack type polyurethane binder consisting of a main component and a curing agent. The above-mentioned subject matter includes a polyether polyol, a polyester polyol, a polyether polyol and a polyester polyol , A catalyst selected from a metal catalyst or an amine catalyst, and at least one selected from a defoaming agent, a UV stabilizer, an antioxidant, a flame retardant, and a pigment.

The curing agent is an isocyanate having an NCO reactor, and may be a polymeric MDI or a polyether polyol obtained by mixing a polymeric MDI with a polyether polyol or a polyester polyol or a mixture of a polyether polyol and a polyester polyol, And a prepolymer made by synthesis.

The mixing ratio of the subject to the curing agent is 100: 50 to 90 by weight.

The metal catalyst and the amine catalyst are gelling catalysts for promoting the resinization reaction between polyol and isocyanate. As the metal catalyst, DBTL (Dibutyltin dilaurate) or Stannous octoate can be used. As the amine catalyst, at least one of TEDA (triethylene diamine), DMEA (Dimethyl ethanolamine), TMBDA (Tetramethyl butane diamime), DM C HA (Dimethyl cyclohexyl amime) and TEA (Triethyl amine) can be used.

The defoaming agent acts to remove air bubbles generated by the reaction or bubbles generated by mixing by lowering the surface tension due to the defoaming agent. The function of the antifoaming agent is classified into three types of action mechanisms, namely, papermaking, defoaming, and defoaming. The generic term of defoaming agent, defoaming agent and defoaming agent is defined as antifoaming agent. It means that the foam penetrates into the foam from the air side and unifies or destroys the foam, and the foam penetrates into the foam from the liquid side to unite or break the foam to make the foam impossible, Means that it penetrates into the interface of the bubble and coalesces the bubble.

Examples of the defoaming agent include silicone defoaming agents, modified silicone defoaming agents, silica silicone defoaming agents, acrylic polymer defoaming agents, fluorine defoaming agents, ether defoaming agents, ester defoaming agents and alkyl oxide fatty acids.

UV stabilizers, antioxidants, flame retardants, and pigments can be UV stabilizers, antioxidants, flame retardants, and pigments used in public road pavements, respectively.

FIG. 1 is a perspective view of a pavement pavement according to an embodiment of the present invention, in which the pavement composition is water-repellent using the pavement composition of the present invention as described above, and the pavement is made of a known pavement- A surface layer 110 stacked on the substrate 10 and a protective layer 120 deposited on the surface layer 110.

The grain size packing layer 10 is made of a known mixture of asphalt and asphalt mixed with asphalt binder and aggregate. The wheat grain packing layer 10 may be laminated on a road surface in a single layer or a plurality of layers and may be packed in a lower layer when the laminate is packed in the lower layer on the base layer 11 and the base layer 11 Is an intermediate layer 12, and the intermediate layer 12 functions to ensure flatness and water tightness.

The surface layer 110 is made by laying the package composition on the wheat-grain-type packaging layer 10 and compaction with the pervious property of the present invention as described above. The surface layer 110 is composed of a first aggregate having a particle size of 13.1 to 20 mm and a second aggregate having a particle size of 10 to 13 mm. Since the bonding strength between the aggregates is secured by the polymer semi-iner, It is confirmed that it is possible to increase the permeability and ensure the excellent structural performance. The surface layer 110 is laminated to a thickness of about 100 to 210 mm.

The protective layer 120 is laminated on the surface layer 110 to constitute a package with drainability according to the present invention. The protective layer 120 is formed by mixing a fine binder having a particle size of 2 to 5 mm with a polymer binder, So that the foreign substances fill the space between the pores of the surface layer 110 to prevent the water permeability from deteriorating. That is, when the surface layer 110 is exposed to the outside, soil, sand, and other foreign matter penetrate into the voids between the aggregates of the surface layer 110 at the upper part of the surface layer 110 to close the voids. . However, when the protective layer 120 made of fine aggregate having a particle size of 2 to 5 mm is laminated on the surface layer 110 as in the present invention, it is possible to prevent foreign matter from penetrating into the voids of the surface layer 110 while ensuring water permeability can do.

The protective layer 120 is composed of a composition obtained by mixing a fine aggregate having a particle size of 2 to 5 mm with a two-pack type polymer binder which is the same as a two-pack type polymer binder of a package composition with a pavement constituting the surface layer 110. More specifically, the protective layer 120 may be composed of 85 to 92% by weight of fine aggregate having a particle size of 2 to 5 mm, 4 to 6% by weight of a fine powder, and the balance polymer binder. The protective layer is laminated to a thickness of 20 to 30 mm, which is most advantageous in securing water permeability and preventing foreign matter from penetrating.

With reference to FIG. 2, a method of constructing the package according to the present invention will be described below.

First, an asphalt mixture mixed with aggregate is installed on the road surface and compaction is performed to form a milky granular packing layer 10 (step S1).

A pavement composition comprising a first aggregate having a particle size of 13.1 to 20 mm and a second aggregate, a stone powder and a two-pack type polymer binder having a particle size of 10 to 13 mm is disposed on the wheat grain packing layer (10) To form a surface layer 110 (step S2).

Next, a composition obtained by mixing fine-grained material having a particle size of 2 to 5 mm with the two-liquid type polymer binder is placed on the surface layer 110 and laminated to form a protective layer 120 (step S3).

Example

Table 1 below shows the quality standards of the drainage asphalt pavement.

Item Test Methods Quality standards Porosity (%) KS F 2364
KS F 2366 20 ± 0.3 Chamber loss ratio (%) (20 ° C) KS F 2492 20 or less Indirect Yangtze River
(TSR, freezing and thawing once) 0.85 or more Permeability coefficient (cm / sec) KS F 2494 0.01 or more

Table 2 below shows the blending design for the surface test specimens (Examples 1 to 4) of the package made of the water-permeable coated package composition made using the package composition with drainability of the present invention. In each package sample, the first aggregate and the second aggregate were used at the same weight ratio, and a specimen was produced by varying the weight of the stone and the polymer binder.

In Comparative Examples 1 and 2, 90% by weight of the first aggregate and the second aggregate were separately used, and 5% by weight of each of the abrasive powder and the polymer binder was used. Comparative Example 3 was prepared by using the first aggregate and the second aggregate, 2 Aggregates were used together but no stones were used.

ingredient Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 1 Example 2 Implementation 3 Example 4 The first aggregate
(weight%) 90 - 47 47 46 45 44 Second aggregate
(weight%) - 90 47 47 46 45 44 Stone
(weight%) 5.0 5.0 - 5.5 4.5 5.0 4.5 Polymer binder (% by weight) 5.0 5.0 6 1.5 3.5 5.0 7.5

Table 3 below shows the performance test results for the comparative examples and the examples in Table 2 above.

ingredient Comparative Example 1 Comparative Example 2 Comparative Example 3 Example 1 Example 2 Example 3 Example 4 Porosity (%) 33.8 24.2 30.2 29.5 28.3 28.5 23.9 Indirect Tensile Strength (MPa) 2.28 2.37 2.80 2.16 3.08 3.70 3.60 Permeability coefficient (cm / sec) 0.904 0.854 0.834 0.940 0.452 0.225 0.211 Kane Tabro (20 ℃)
18.0
17.8
33.4
15.2
13.0
10.7 11.1

As can be seen from the above Table 3, the indirect tensile strengths of Comparative Examples 1 and 2 are superior to those of conventional asphalt mixtures and excellent in water permeability. However, in comparison with Examples 2 and 3 in terms of indirect tensile strength It is significantly smaller. Also, in Comparative Example 3, the indirect tensile strength and permeability were excellent, but the Kantaburo (20 ° C) test failed to pass the standard of 20% or less.

In the case of Example 1, the water permeability was also excellent, and the indirect tensile strength was significantly smaller than that in Examples 2 and 3, although the test was also passed through the Kantaburo (20 ° C) test. In Example 4, However, the permeability is relatively small.

In Examples 2 and 3, both of the indirect tensile strength and the water permeability were excellent, and it was confirmed to be the most preferable by passing the test by the kanban. Therefore, the polymer binder content of the package composition is preferably 2 to 7% by weight, and more preferably, the polymer binder content of the package composition is 3.5 to 5.0% by weight.

Fig. 3 is a graph showing the results of indirect tensile strength test for three specimens according to Example 2, and the specimen of Example 2 exhibited excellent indirect tensile strength with an indirect tensile strength exceeding 3.0 MPa.

As described above, the pavement body of the present invention is made of a mixture of coarse aggregates of a mixture of a first aggregate having a particle size of 13.1 to 20 mm and a second aggregate having a particle size of 10 to 13 mm and a fine aggregate for filling the pores of the coarse aggregate So that excellent permeability and indirect tensile strength can be achieved at the same time.

4 and 5 are graphs showing the results of evaluating the long-term performance of the pavement pavement using the conventional pavement asphalt mixture and the pavement of the present invention with dual pavement tires at a high temperature of 30 to 40 ° C, And the plastic deformation test was carried out by loading 60,000 times at a speed of 10 km / h.

As a result of the test, it was found that plastic deformation of the pavement of 12 mm occurred in the pavement using the existing pavement asphalt mixture. However, when the pavement was constructed using the pavement composition according to the present invention, Respectively.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

10: wheat grain packing layer 11: base layer
12: intermediate layer 110: surface layer
120: protective layer

Claims (7)

1. A road pavement composition laid on a road to form a surface layer of the road,
44 to 47% by weight of an aggregate having a particle size of 13.1 to 20 mm, 4.5 to 5% by weight of an aggregate, 2 to 7% by weight of a polymer binder, and a balance aggregate having a particle size of 10 to 13 mm,
The polymer binder is a two-component binder comprising a base and a curing agent,
The present invention relates to a process for producing a polyether polyol, a polyester polyol, a polyether polyol and a polyester polyol synthesized from a polyether polyol, a catalyst selected from a metal catalyst or an amine catalyst, A UV stabilizer, an antioxidant, a flame retardant, and a pigment,
The curing agent is an isocyanate having an NCO reactor and is prepared by synthesizing Polymeric MDI or Polymeric MDI with polyether obtained by mixing polyether polyol or polyester polyol or polyether polyol and polyester polyol A prepared prepolymer,
Wherein the mixing ratio of the subject to the curing agent is 100: 50 to 90 by weight. delete A surface layer comprising the package composition according to claim 1; And
A protective layer formed on the surface layer and composed of a composition obtained by mixing the fine aggregate having a particle size of 2 to 5 mm with the same polymer binder as that of the polymeric binder of the package composition in accordance with the first aspect;
Wherein the pavement is paved. The package according to claim 3, wherein the protective layer is laminated to a thickness of 20 to 30 mm. The package according to claim 3, wherein the surface layer is laminated on a wheat grain packing layer made of an asphalt mixture in which an aggregate is mixed with an asphalt binder. Forming an asphalt mixture with an aggregate on the road surface and compaction to form a grain size packing layer;
Forming a surface layer on the milky granular packing layer by laying the package composition in an environmentally-friendly manner according to the first aspect; And
Forming a protective layer by layering a fine-grained material having a particle size of 2 to 5 mm on the surface layer with a polymer binder having the same polymeric binder as the polymeric binder of the package composition;
Wherein the method comprises the steps of: The method of claim 6, wherein the protective layer is installed at a thickness of 20 to 30 mm.

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