JP2021042659A - Permeation type asphalt concrete, and manufacturing method and application thereof - Google Patents

Abstract

To provide a pavement material that is easy to apply with good deformation adjustment ability, fatigue resistance, and good adhesion to a substrate.SOLUTION: Permeation type asphalt concrete contains the following ingredients by weight percentage: 67 to 80% stone material; 0 to 20% filler; and 10 to 23% asphalt. The stone material is composed of the following components by weight percentage: stone material with a particle size of 2.36 to 4.75 mm with a weight percentage of 20 to 32%; stone material with a particle size of 4.75 to 9.5 mm with a weight percentage of 15 to 25%; stone material with a particle size of 9.5 to 13.2 mm with a weight percentage of 15 to 25%; and stone material with a particle size of 13.2 to 16 mm with a weight percentage of 25 to 35%. In a manufacturing process, two processes of heating and premixing of the stone material are added so as to make construction more convenient and ensure that an asphalt binder is more fully infused.SELECTED DRAWING: Figure 1

Description

The present invention relates to pavement materials, and more particularly to permeation type asphalt concrete and methods and applications thereof.

In recent years, high-temperature rutting and low-temperature cracking of asphalt pavement have frequently occurred due to increased traffic pressure and frequent occurrence of abnormal weather. In order to reduce the initial illness of asphalt pavement and improve the performance of the pavement, one can start with the design of the pavement material and the other can improve the design of the pavement structure.

At present, most asphalt pavement materials in Japan use AC type asphalt concrete, the gradation curve is determined by adopting the principle of maximum density, and the optimum amount of asphalt is determined by the Marshall method. There is a discordant contradiction between the performance of this type of concrete designed according to the Marshall method and the maximum density gradient curve. For example, there is a contradiction between high temperature stability and fatigue performance, a contradiction between high temperature stability and low temperature crack resistance, and a contradiction between precise durability and slip resistance. Various technical measures have been taken to improve the high temperature stability of asphalt concrete, and the use of high-performance modified asphalt has basically solved the problem of rutting of asphalt concrete. Asphalt concrete designed according to this system has a limited asphalt content and often requires more filler than necessary, so that the good deformability of the asphalt material can be demonstrated. It becomes impossible, the tensile deformation ability of asphalt concrete deteriorates, and asphalt concrete becomes prone to a series of problems such as fatigue, cracking, water damage and aging. Under the premise of ensuring resistance to rutting, how to significantly improve the tensile deformation capacity of asphalt concrete is an urgent issue to be solved.

As a general pavement structure, an asphalt-penetrated pavement is a pavement in which asphalt-impregnated crushed stone (gravel) is used as a base layer, a connecting layer and a surface layer, that is, precompressed crushed stone (or broken gravel). , Asphalt surface layer formed by pouring asphalt in layers, laying a pavement material, or laying a heat-mixed asphalt concrete layer on top of it and compacting it. Conventional asphalt infiltration pavement makes the best use of squeeze between coarse aggregates, the coarse aggregate forms a skeleton in concrete, and under certain conditions, the effect of preventing rutting can be realized. In the conventional asphalt penetration type asphalt pavement, a skeleton is theoretically formed on concrete by using a squeeze between coarse aggregates, but the construction process is complicated, and it is difficult to control the construction quality. The skeleton structure of the coarse aggregate of concrete cannot reach a stable state, and as a result, its road performance usually does not reach the desired effect.

Therefore, there is an urgent need to develop pavement materials that have a stable skeleton structure, better road performance, and are easier to construct.

Chinese Patent Application Publication No. 109987881

The present invention discloses asphalt concrete belonging to the field of asphalt concrete and a method for producing the same, and solves the problem that a large amount of energy needs to be consumed and heated for transporting and keeping heat of asphalt concrete. The present invention realizes heat retention during transportation of asphalt concrete and reduces energy consumption by adding a heat retention component and a heat conduction component.

In consideration of the above problems, an object of the present invention is to provide a pavement material which is easy to construct, has good deformation adjustment ability and fatigue resistance, and has good adhesiveness to a substrate.

The technical solutions adopted by the present invention to achieve the above object are as follows: Penetration asphalt concrete containing the following components by weight percentage: 67-80% stone, 0 filler ~ 20% and asphalt 10-23%. Here, the stone material is composed of the following components by weight percentage: a stone material having a weight percentage of 20 to 32% and a particle size of 2.36 to 4.75 mm, and a weight percentage having a particle size of 15 to 25% 4 Stones with a weight percentage of .75 to 9.5 mm, a particle size of 15 to 25% with a particle size of 9.5 to 13.2 mm, and stones with a weight percentage of 25 to 35% and a particle size of 13.2 to 16 mm.

The stone gradient, asphalt amount, filler material, etc. of the present invention are different from the conventional asphalt infiltration type pavement, and the crushed stone of the present invention is designed according to a certain gradation, has no fine aggregate, and has asphalt and mineral aggregate. Due to the large mass ratio, the skeleton gap ratio of concrete can be reached to the minimum. Also, because the density of asphalt is much lower than that of fine aggregate, there is more asphalt and less stone, so the mass is lighter. Crushed stone of penetrating asphalt concrete forms a skeleton that acts as a support and is the main bearer and transmitter of the load, which ensures that the concrete is highly resistant to rutting and is the lower layer of the pavement structure as a structural layer. Can be used for. After uniformly stirring the asphalt and filler, an adhesive slurry is formed and the adhesive slurry is poured into crushed stone, the adhesive slurry mainly serves as a bond, filling and sealing, and the asphalt concrete produced thereby. Has excellent tensile deformation ability and crack resistance, and can be used as a stress absorbing (dispersion) layer at the bottom of the asphalt layer of old cement pavement or under the asphalt pavement structure of semi-hard base layer, rutting. Can improve current asphalt pavement problems such as digging and cracking.

In a preferred embodiment of the present invention, the stone material is at least one of granite and dolerite.

In a preferred embodiment of the present invention, the filler is fly ash.

As a preferred embodiment of the present invention, the asphalt is at least one of SBS modified asphalt, S-HV modified asphalt and ultra-high viscosity modified asphalt.

Here, the S-HV modified asphalt is a kind of high-viscosity asphalt.

The present invention further provides a method for producing the permeation type asphalt concrete, which method comprises the following steps.

Step (1), heat the crushed stone, add a small amount of asphalt and mix uniformly to form a premixed crushed stone.

In step (2), the asphalt is heated to the permeation temperature, and at the same time, the filler is added several times in multiple steps, and the amount of filler added each time does not exceed 30% of the total amount of filler, and it is often before adding the filler again. It is necessary to stir evenly.

The premixed crushed stones of steps (3) and (1) are paved on the target road surface or mold, tamped from the side surface to the center, and leveled.

Step (4), asphalt or asphalt mastic may be poured into premixed crushed stone from the side to the center and cured at room temperature.

The difference between the present invention and the conventional asphalt infiltration type pavement is that the manufacturing process increases the two processes of heating and premixing the aggregate / stone, and the sloped pavement of the conventional asphalt infiltration type pavement is totally paved. To improve the efficiency and quality of pavement. If conditions are met, simultaneous construction can be adopted, pouring asphalt binder while paving premixed high temperature crushed stone, completing the pavement at once, thereby allowing conventional asphalt infiltration pavement to adopt sloping pavement. The construction process is complicated, the void ratio of the mixture is large, and the skeleton is unstable.

As a preferred embodiment of the present invention, in the step (1), it is necessary to heat the crushed stone to a temperature 10 to 20 ° C. higher than the permeation temperature of the cementum material. The amount of asphalt added is 0.5% to 0.6% by mass of crushed stone. As a preferred embodiment of the present invention, in the step (2), the asphalt or asphalt mastic has a temperature of 180 to 255 ° C. and ≦ 0.28 Pa. It is heated to a viscosity of s.

After uniformly stirring the asphalt and the filler, an adhesive slurry was formed, and the adhesive slurry was heated to a corresponding temperature to increase its viscosity to 0.28 Pa. After less than s, it is poured into a heated, mixed, gradient crushed stone, and the heating temperature of the premixed crushed stone must exceed the asphalt binder pouring temperature by 10 ° C, thereby causing the asphalt binder to be hot. It is ensured that the crushed stone can be completely poured into the crushed stone, and the disadvantages of poor adhesion between conventional asphalt-penetrating pavement aggregates and the tendency for loosening and peeling to occur are overcome.

As a preferred embodiment of the present invention, in the step (4), the curing time is 48 hours or more.

The present invention further requires protection for the application of the concrete during the pavement process of road and bridge surfaces.

If desired, concrete modules of various sizes can be manufactured to pave the road and bridge surfaces, or concrete can be manufactured directly on the required road section to obtain the corresponding road and bridge surfaces.

Preferably, the concrete has a thickness of 3 to 10 cm.

The present invention provides a permeation type asphalt concrete, which is designed in consideration of the amount and ratio of materials, the pavement method (including the molding method and the construction temperature), and the pavement efficiency is high. The thickness of one construction can reach 3-10 cm. The asphalt film is thick, dense, impermeable, highly resistant to water damage and aging, and can be used as an underlayer of long-lived pavement structures. That is, a surface wear layer may be formed directly on it and the wear layer may be replaced or repaired at the end of its useful life. It also has good high temperature rutting resistance and very good tensile deformation ability, can effectively prevent low temperature cracks and fatigue cracks, stress in the case of white + black road surface structure or (semi) hard base layer. It can be used as a dispersion layer and a structural layer to prevent reflective cracking. Further, the permeation type asphalt concrete of the present invention has further features such as light mass, quick construction, and good adhesion to the base, and the conventional asphalt permeation type pavement has a complicated construction process. It compensates for the disadvantages such as unstable skeleton structure and limited thickness of structural layer, shortens pavement and compaction time, and opens traffic faster. The content of asphalt and fine aggregate in the pouring asphalt mixture is high, causing the coarse aggregate to float, making its high temperature stability inadequate and making the road surface prone to rutting and interlayer deformation. It is expected that it will be widely used in the side surface such as bridge surface pavement, stress absorption layer and crack resistant structure layer.

9 is a viscosity-temperature curve of the S-HV modified asphalt mastic of Example 1. It is a viscosity-temperature curve of the ultra-high viscosity modified asphalt of Example 2. It is the schematic of the pull-out test.

In order to better illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described below with reference to the drawings and specific examples.

Example 1
In one embodiment of the penetrating asphalt concrete of the present invention, the penetrating asphalt concrete of the present embodiment contains the following components by weight percentage: 72.8% stone, 15.8% S-HV modified asphalt, fly. Ash 11.4%. Here, the stone material is diabase and is composed of the following components by weight percentage: a stone material having a weight percentage of 29.33% and a particle size of 13.2 to 16 mm, and a weight percentage of 19.69%. The particle size of 9.5 to 13.2 mm, the weight percentage is 20.94%, the particle size is 4.75 to 9.5 mm, and the weight percentage is 30.04%, the particle size is 2.36 to 4.75 mm. Stone material.

The synthetic gradation of the penetrating asphalt concrete of this example is shown in Table 1.

In this example, the permeation temperature of the asphalt mastic is determined by the T0625-2011 asphalt rotational viscosity test of JTGE20-2011. The fly ash and S-HV modified asphalt are uniformly agitated to form an asphalt mastic, the ratio of filler to asphalt is 4.2: 5.8, and the rotational viscosity of the asphalt mastic at various temperatures. The viscosity-temperature curve was obtained by measurement and the original linear fitting, and the viscosity-temperature curve is as shown in FIG. From FIG. 1, when the temperature of the S-HV modified asphalt mastic is 227 ° C. or higher, the viscosity of the asphalt mastic is 0.28 Pa. It can be seen that it reaches less than s. Therefore, the permeation temperature of the S-HV modified asphalt mastic (the ratio of the filler to the asphalt is 4.2: 5.8) is determined to be 227 ° C.

The manufacturing method of this example is as follows.

First, the graded crushed stone and S-HV modified asphalt are placed in an oven and heated to 200 ° C., and the mass ratio of asphalt to mineral aggregate is 0.6%, which is placed in a stirrer and uniform for 90 seconds. Stir to obtain premixed crushed stone. Next, a premixed crushed stone with a mass ratio of 0.6% of asphalt and mineral aggregate and a rutting test template are placed in an oven and heated to a temperature 10 ° C. higher than the permeation temperature of the cementum material. Subsequently, the asphalt is heated to a temperature above 227 ° C. on an electric stove, and the corresponding mass of fly ash is added in a plurality of steps while heating and stirring, and the asphalt is uniformly stirred to produce an asphalt mastic. Then, when the asphalt mastic reaches the corresponding temperature, the preheated test stencil is removed from the oven, a piece of plain paper (newspaper can be used) cut is spread over the test stencil, and the bottom and sides are paper. The premixed crushed stone is taken out and poured into a test template, and once compacted from the side to the center using a small compaction hammer, leveling treatment is performed. Then, asphalt or asphalt mastic heated to the corresponding temperature may be poured into the premixed crushed stone from the side to the center and cured at room temperature for 48 hours.

Example 2
In one embodiment of the permeation type asphalt concrete of the present invention, the permeation type asphalt concrete of this example contains the following components by weight percentage: 78.4% stone, 22.6% ultra-high viscosity modified asphalt and filler. 0%. Here, the stone material is diabase and is composed of the following components by weight percentage: a stone material having a weight percentage of 29.33% and a particle size of 13.2 to 16 mm, and a weight percentage of 19.69%. The particle size of 9.5 to 13.2 mm, the weight percentage is 20.94%, the particle size is 4.75 to 9.5 mm, and the weight percentage is 30.04%, the particle size is 2.36 to 4.75 mm. Stone material.

The synthetic gradation of the penetrating asphalt concrete of this example is shown in Table 2.

In this example, the permeation temperature of ultra-high viscosity modified asphalt is determined by the T0625-2011 asphalt rotational viscosity test of JTGE20-2011. The rotational viscosity of the ultra-high viscosity modified asphalt at various temperatures was measured, and the viscosity-temperature curve was obtained by orange linear fitting, and the viscosity-temperature curve is as shown in FIG. From FIG. 2, when the temperature of the ultra-high viscosity modified asphalt reaches 245 ° C. or higher, the viscosity of the asphalt mastic becomes 0.28 Pa. It can be seen that it reaches less than s. Therefore, the permeation temperature of the ultra-high viscosity modified asphalt is determined to be 245 ° C.

The manufacturing method of this example is as follows.

First, crushed crushed stone and ultra-high viscosity modified asphalt are placed in an oven and heated to 200 ° C., and the mass ratio of asphalt and mineral aggregate is placed in a stirrer at a ratio of 0.6%, and the mixture is uniformly stirred for 90 seconds. To obtain premixed crushed stone. Next, a premixed crushed stone having a mass ratio of 0.6% of asphalt and mineral aggregate and a rutting test template are placed in an oven and heated to a temperature 10 ° C. higher than the permeation temperature of the cementum material. Subsequently, the asphalt is heated to a temperature exceeding 245 ° C. with an electric stove, and when the asphalt or the asphalt reaches the corresponding temperature, the preheated test template is taken out from the oven and a piece of plain paper (newsprint is used) cut. Spread on the test stencil, separate the bottom and sides with paper, take out the premixed crushed stone and pour it into the test stencil, and tamper once from the side to the center using a small consolidation hammer. Then, the leveling process is performed. Then, the asphalt heated to the corresponding temperature is poured into the premixed crushed stone from the side to the center and cured at room temperature for 48 hours.

Example 3
In one embodiment of the penetrating asphalt concrete of the present invention, the penetrating asphalt concrete of the present embodiment contains the following components by weight percentage: 80% stone, 10% SBS modified asphalt, 10% fly ash. Here, the stone material is diabase and is composed of the following components by weight percentage: a stone material having a weight percentage of 32% and a particle size of 13.2 to 16 mm, and a weight percentage of a particle size of 15% 9 .5-13.2 mm stones, weight percentage 25% particle size 4.75-9.5 mm stones and weight percentage 28% particle size 2.36-4.75 mm stones.

In this example, the permeation temperature of the modified asphalt is determined by the T0625-2011 asphalt rotational viscosity test of JTGE20-2011. The manufacturing method of this example is as follows.

First, the graded crushed stone and asphalt are placed in an oven and heated, and the mass ratio of asphalt and mineral aggregate is placed in a stirrer at a ratio of 0.5%, and the mixture is uniformly stirred for 90 seconds to prepare the premixed crushed stone. obtain. Next, a premixed crushed stone having a mass ratio of 0.5% of asphalt and mineral aggregate and a rutting test template are placed in an oven and heated to a temperature 10 ° C. higher than the permeation temperature of the cementum material. Subsequently, the asphalt is heated to a temperature higher than the permeation temperature with an electric stove, and when the asphalt or the asphalt reaches the corresponding temperature, the preheated test stencil is taken out from the oven and a piece of plain paper (newspaper) cut is taken out. Spread (usable) on a test stencil, separate the bottom and sides with paper, remove the premixed crushed stone and pour it into the test stencil, and use a small compaction hammer to poke once from the side to the center. Harden and perform leveling processing. Then, the asphalt heated to the corresponding temperature is poured into the premixed crushed stone from the side to the center and cured at room temperature for 48 hours.

Example 4
In one embodiment of the penetrating asphalt concrete of the present invention, the penetrating asphalt concrete of the present embodiment contains the following components by weight percentage: 57% stone, 23% S-HV modified asphalt, 20% fly ash. Here, the stone material is granite and is composed of the following components by weight percentage: a stone material having a weight percentage of 20% and a particle size of 13.2 to 16 mm, and a weight percentage of 25% having a particle size of 9.5. ~ 13.2 mm stones, weight percentage 15% particle size 4.75-9.5 mm stones and weight percentage 35% particle size 2.36-4.75 mm stones.

In this example, the permeation temperature of the modified asphalt is determined by the T0625-2011 asphalt rotational viscosity test of JTGE20-2011. The manufacturing method of this example is as follows.

First, the graded crushed stone and asphalt are placed in an oven and heated, and the mass ratio of asphalt and mineral aggregate is placed in a stirrer at a ratio of 0.6%, and the mixture is uniformly stirred for 90 seconds to prepare the premixed crushed stone. obtain. Next, a premixed crushed stone having a mass ratio of 0.6% of asphalt and mineral aggregate and a rutting test template are placed in an oven and heated to a temperature 20 ° C. higher than the permeation temperature of the cementum material. Subsequently, the asphalt is heated to a temperature higher than the permeation temperature with an electric stove, and when the asphalt or the asphalt reaches the corresponding temperature, the preheated test stencil is taken out from the oven and a piece of plain paper (newspaper) cut is taken out. Spread (usable) on a test stencil, separate the bottom and sides with paper, remove the premixed crushed stone and pour it into the test stencil, and use a small compaction hammer to poke once from the side to the center. Harden and perform leveling processing. Then, the asphalt heated to the corresponding temperature is poured into the premixed crushed stone from the side to the center and cured at room temperature for 48 hours.

Example 5
In one embodiment of the penetrating asphalt concrete of the present invention, the penetrating asphalt concrete of the present embodiment contains the following components by weight percentage: 67% stone, 16% SBS modified asphalt, 17% fly ash. Here, the stone material is diabase and is composed of the following components by weight percentage: a stone material having a weight percentage of 30% and a particle size of 13.2 to 16 mm, and a weight percentage of a particle size of 25% 9 .5-13.2 mm stones, weight percentage 20% particle size 4.75-9.5 mm stones and weight percentage 25% particle size 2.36-4.75 mm stones.

In this example, the permeation temperature of the modified asphalt is determined by the T0625-2011 asphalt rotational viscosity test of JTGE20-2011. The manufacturing method of this example is as follows:

First, the graded crushed stone and asphalt are placed in an oven and heated, and the mass ratio of asphalt and mineral aggregate is placed in a stirrer at a ratio of 0.5%, and the mixture is uniformly stirred for 90 seconds to prepare the premixed crushed stone. obtain. Next, a premixed crushed stone having a mass ratio of 0.5% of asphalt and mineral aggregate and a rutting test template are placed in an oven and heated to a temperature 10 ° C. higher than the permeation temperature of the cementum material. Subsequently, the asphalt is heated to a temperature higher than the permeation temperature with an electric stove, and when the asphalt or the asphalt reaches the corresponding temperature, the preheated test stencil is taken out from the oven and a piece of plain paper (newspaper) cut is taken out. Spread (usable) on a test stencil, separate the bottom and sides with paper, remove the premixed crushed stone and pour it into the test stencil, and use a small compaction hammer to poke once from the side to the center. Harden and perform leveling processing. Then, the asphalt heated to the corresponding temperature is poured into the premixed crushed stone from the side to the center and cured at room temperature for 48 hours.

Comparative Example 1
Asphalt infiltration type pavement material, the specifications, amount and molding method of the material refer to "Technical specifications for construction of road asphalt pavement" and include the following components by weight percentage: stone 92.2%, S- HV modified asphalt 7.8%.

The stone material of this comparative example is diabase, and the gradation is as shown in Table 3.

The manufacturing method of this comparative example is as follows.

Step (1) Put the asphalt in the oven and heat it to 180 ° C.

In step (2), a main layer stone having a particle size of 31.5 to 37.5 mm is poured into a test template, and a small compaction hammer is used to compact the main layer stone from the side surface to the center once to perform a leveling process.

Step (3), the asphalt of the first layer is sprinkled, and the amount of asphalt of the layer is 3.6%.

Step (4) Pour a stone material with a particle size of 13.2 to 19 mm into the test template as the first layer of caulking material, and use a small compaction hammer to compact it once from the side to the center for leveling treatment. Do.

Step (5), the asphalt of the second layer is sprinkled, and the amount of asphalt of the layer is 2.8%.

Step (6), pour a stone material with a particle size of 9.5 to 13.2 mm into a test template as a second layer of caulking material, and use a small compaction hammer to tamper once from the side to the center for leveling. Perform processing.

Step (7), the asphalt of the third layer is sprinkled, and the amount of asphalt of the layer is 1.4%.

Step (8), pour a stone material with a particle size of 2.36 to 4.75 mm into a test template as a seal coating material, and use a small compaction hammer to tamper once from the side to the center for leveling treatment. Do.

Step (9) After the test piece is completed, the test piece is cured at room temperature for 48 hours.

Comparative Example 2
The comparative example is the content of the literature (Li Weiji. Performance evaluation of pouring asphalt concrete for bridge surface pavement of Hong Kong-Zhuhai Bridge [J]. Guangdong Building Materials, 2018, 34 (03): 19-23). Pour-type asphalt concrete containing the following components by weight percent: 47% coarse aggregate, 37.8% fine aggregate and 15.2% asphalt. The asphalt is a concrete asphalt composed of AH70 # substrate asphalt having a mass ratio of 3: 7 and TLA lake asphalt. The coarse aggregate is basalt, and the gradation is as shown in Table 4.

The fine aggregate is limestone and is divided into three stages of A (2.36 to 0.6 mm), B (0.6 to 0.212 mm), and C (0.212 to 0.075 mm). , The gradation is as shown in Table 5.

The aggregate and asphalt are placed in a rice cooker and mixed for 2.5 hours, and the mixing temperature is 250 ° C.

1. Rutting test Test pieces for rutting test are manufactured according to the materials and methods of Examples and Comparative Examples, and the rutting test is performed. The rutting test is an effective and viable method for assessing the high temperature performance of asphalt concrete. The rutting plate was formed by adopting the method of "Asphalt and Asphalt Concrete Test Regulations" T0703-2011, its dynamic stability was measured, and the test results of Examples 1 and 2 and Comparative Examples are shown in Table 6. It is shown. (Here, for the experimental results of Comparative Example 2, refer to the literature results.)

As can be seen from Table 6, the test results of Examples 1 and 2 of the present invention are much higher than the road surface results and related technical requirements of Comparative Examples 1 and 2. In the test, the rutting displacement generated by the conventional asphalt infiltration type pavement material exceeds 25 mm, which is beyond the measurement range of the automatic rutting tester, and therefore its dynamic stability cannot be measured. The reasons are as follows: 1. Since the aggregate of the conventional asphalt penetration type pavement is not heated, the fluidity is reduced in the process of pouring the asphalt into the aggregate, and the aggregate cannot be completely coated. As a result, the adhesiveness between the aggregates deteriorates, and phenomena such as loosening and peeling are likely to appear. 2. Since the conventional asphalt infiltration type pavement uses the inclined pavement method, a part of the caulking material cannot fill the voids of the main layer stone, which increases the porosity in the concrete and makes it dense. It does not become a state. However, since the content of asphalt and fine aggregate in the pouring type asphalt concrete is high, the coarse aggregate is made to be in a floating state, and its high temperature stability becomes insufficient. Since the coarse aggregate in the penetrating asphalt concrete of the present invention forms a framework, the ability to prevent rutting of concrete is greatly improved.

2. Concrete bending test The test piece of the rutting plate of the above example is cut into a beam test piece of 250 mm × 30 mm × 35 mm, and a beam bending test is performed. The concrete bending test is an effective and viable method for evaluating the low temperature crack resistance of asphalt concrete. The maximum bending strain was measured by adopting the method of "Asphalt and Asphalt Concrete Test Regulations" T0715-2011, and the test results of Examples 1 and 2 and Comparative Examples are as shown in Table 7, and from the results. It can be seen that the test piece produced in the present invention far exceeds the technical requirements and is excellent in low temperature crack resistance. (Here, for the experimental results of Comparative Example 2, refer to the literature results.)

From Table 7, the crack resistance and deformation adjustment ability of the two concretes of Example 1 and Comparative Example are the same, and the maximum bending strain of the concrete of Example 2 at -10 ° C is the GMA10 pouring of Comparative Example 2. It can be seen that it is slightly larger than that of the formula asphalt concrete. Therefore, in order to ensure a certain level of high temperature stability and rutting prevention ability, asphalt concrete has excellent crack resistance equivalent to that of pouring asphalt concrete, and further secures good followability with steel sheets. , Is expected to be applied to bridge pavement.

3. Pull-out test This test adopts a pull-out test to evaluate the adhesiveness of the asphalt concrete to the base. The principle of the pull-out test is as shown in FIG. According to the materials and methods of Examples, test pieces having a base thickness of 4 cm, 6 cm, and 8 cm are produced, respectively, and a pull-out test is performed. In order to prevent the transition of asphalt pavement structure and the occurrence of diseases such as delamination, concrete needs to have a certain degree of adhesiveness to the base. In this test, the pull-out strength of the asphalt concrete against the steel plate base and the cement concrete base under different structural layer thicknesses was measured, respectively, and the test results of Examples 1 and 2 and Comparative Examples are shown in Table 8. Is.

From Table 8, it can be seen that the concrete produced by the present invention has strong adhesiveness to the substrate.

According to various road performance tests, the performance of the penetrating asphalt concrete of each embodiment of the present invention meets each technical index and has good high temperature rutting resistance and excellent low temperature crack resistance and deformation adjustment ability. However, it has the advantages of light mass, strong adhesion to the base, good waterproof performance and fatigue resistance, and quick construction, so many of the bridge surface pavement, stress absorption layer and crack resistant structure layer, etc. It can be seen that it is expected to be applied in the field of.

Finally, it should be explained that the above examples are used only for explaining the technical solutions of the present invention and do not limit the scope of protection of the present invention. Although the present invention has been described in detail above, those skilled in the art will understand that the technical solutions of the present invention can be modified or equivalent without departing from the substance and scope of the technical solutions of the present invention. Should be.

Claims (9)

A stone material with a weight percentage of 20 to 32% and a particle size of 2.36 to 4.75 mm, a stone material with a weight percentage of 15 to 25% and a particle size of 4.75 to 9.5 mm, and a weight percentage of a particle size of 15 to 25%. It is composed of a stone with a weight percentage of 9.5 to 13.2 mm and a stone with a particle size of 25 to 35% and a particle size of 13.2 to 16 mm. A stone with a weight percentage of 67 to 80% and a weight percentage of 0 to 20%. A penetrating asphalt concrete comprising a filler and asphalt having a weight percentage of 10 to 23%. The concrete according to claim 1, wherein the stone material is at least one of granite and dolerite. The concrete according to claim 1, wherein the filler is fly ash. The concrete according to claim 1, wherein the asphalt is at least one of SBS modified asphalt, S-HV modified asphalt, and ultra-high viscosity modified asphalt. In step (1), where the crushed stone is heated, a small amount of asphalt is added, and the crushed stone is mixed uniformly to form a premixed crushed stone.
Add the filler several times in multiple steps while heating the remaining asphalt to the permeation temperature, each time adding no more than 30% of the total amount of filler and stirring well and evenly before adding the filler again. Step (2) that needs to be done and
In step (3), the premixed crushed stone is paved on the target road surface or mold, tamped from the side to the center, and leveled.
The permeation according to any one of claims 1 to 4, wherein the asphalt or asphalt mastic is poured into a premixed crushed stone from the side to the center and cured at room temperature (4). Method of manufacturing formula asphalt concrete. In the step (1), it is necessary to heat the crushed stone to a temperature 10 to 20 ° C. higher than the permeation temperature of the cementum material, and the additional amount of asphalt is 0.5 to 0.6% of the mass of the crushed stone. The production method according to claim 5, wherein the method is characterized by the above. In step (2), the asphalt or asphalt mastic was heated to a temperature of 180 to 255 ° C. and ≦ 0.28 Pa. The production method according to claim 5, wherein the material is heated to a viscosity of s. Application to the permeation type asphalt concrete pavement and bridge surface pavement according to any one of claims 1 to 7. The application according to claim 8, wherein the thickness of the permeation type asphalt concrete is 3 to 10 cm.