CN110510920B

CN110510920B - Frost crack prevention pavement

Info

Publication number: CN110510920B
Application number: CN201910796815.8A
Authority: CN
Inventors: 林惜容
Original assignee: Guangdong Yuetang Construction Co ltd
Current assignee: Guangdong Yuetang Construction Co ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2021-09-14
Anticipated expiration: 2039-08-27
Also published as: CN110510920A

Abstract

The invention relates to the technical field of pavements, and provides an anti-frost-crack pavement aiming at the problem that the pavement is easy to frost crack, wherein the technical scheme is as follows: including upwards cushion, basic unit and the surface course of laying in proper order along vertical direction, the surface course is laid by the pitch that prevents frostbite and splits and forms, the pitch that prevents frostbite and splits includes the component of following part by mass: 100 parts of asphalt; 25-35 parts of meso-tetra (4-carboxyphenyl) porphin and 300 parts of coarse aggregate; 100 portions and 200 portions of fine aggregate. The brittle point of the anti-frost cracking asphalt is effectively reduced by adding the meso-tetra (4-carboxyphenyl) porphine into the asphalt, so that an asphalt surface layer cast by the anti-frost cracking asphalt can bear colder weather, and the condition that the surface layer is shrunk by cooling to cause pavement cracking is not easy to occur.

Description

Frost crack prevention pavement

Technical Field

The invention relates to the technical field of pavement construction, in particular to a pavement construction method. The invention relates to the technical field of pavements, in particular to an anti-frost-crack pavement.

Background

The road surface is a layered structure that is laid on a road bed with various road building materials and directly bears the load of vehicles. The pavement with good quality has enough strength and good stability, and the surface of the pavement can meet the requirements of smoothness, compactness and skid resistance. The pavement structure consists of a surface layer, a base layer and a cushion layer.

In cold areas, after the automobile enters winter, the temperature is low, the road surface is easy to frost crack, a long crack is formed, and the automobile walking is seriously influenced, so that the automobile has an improved space.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an anti-frost-crack road surface which has the advantage of low probability of frost cracking.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a frost crack prevention road surface, includes upwards the bed course, basic unit and the surface course of laying in proper order along vertical direction, the surface course is laid by frost crack prevention pitch and is formed, frost crack prevention pitch includes the component of following parts by mass:

100 parts of asphalt;

25-35 parts of meso-tetra (4-carboxyphenyl) porphin

200 portions and 300 portions of coarse aggregate;

100 portions and 200 portions of fine aggregate.

By adopting the technical scheme, the brittle point of the anti-freezing asphalt is effectively reduced by adding the meso-tetra (4-carboxyphenyl) porphine into the asphalt, so that an asphalt surface layer poured by the anti-freezing asphalt can bear colder weather, the condition that the asphalt surface layer reaches the brittle point due to too low temperature is not easy to occur, and the condition that the pavement is cracked due to the fact that the asphalt surface layer reaches the brittle point and the stress of the surface layer subjected to cold shrinkage cannot be resisted is not easy to occur;

the frost crack prevention pavement surface layer is formed by laying frost crack prevention asphalt, so that the surface layer is not prone to frost crack, and further the frost crack prevention pavement is not prone to frost crack.

The invention is further configured to: the frost cracking prevention asphalt also comprises the following components in parts by weight:

10-20 parts of copper powder.

By adopting the technical scheme, the copper powder is added into the asphalt, and the copper powder is utilized for heat conduction, so that heat is easy to transfer in the asphalt surface layer, the temperature distribution of the asphalt surface layer is uniform, and the situation of local overheating or local supercooling is not easy to occur.

15-25 parts of polypyrrole.

Through adopting above-mentioned technical scheme, through adding polypyrrole, the cooperation copper powder forms better conducting loop for the tire is easily than the bituminous surface layer absorption at the static that the friction of bituminous surface layer produced, is difficult for producing static, reduces static harm.

10-15 parts of glass fiber;

the length of the glass fiber is 10-15 mm.

By adopting the technical scheme, the anti-cracking asphalt is reinforced by the glass fiber, so that the asphalt surface layer has better strength and is not easy to crack, and the structural stability of the pavement is improved; meanwhile, the movement of the anti-frost-crack asphalt is limited by the glass fiber, so that the anti-rutting performance of the asphalt surface layer is good, and the asphalt surface layer is not easy to deform.

3-5 parts of activated carbon particles;

the particle size of the active carbon particles is 1-2 mm.

Through adopting above-mentioned technical scheme, through adding the active carbon, utilize active carbon adsorption glass fiber for the active carbon is as glass fiber's node, makes glass fiber form network structure to a certain extent and in order to reinforce the surface course better, is difficult for the fracture when making the surface course low temperature, is difficult for deformation when high temperature.

15-20 parts of fumed silica.

By adopting the technical scheme, the anti-freezing asphalt has better thixotropy by adding the fumed silica, so that the anti-freezing asphalt is easy to trowel when being laid, and a reticular structure is formed by utilizing the fumed silica when being static to limit the flow of the anti-freezing asphalt, thereby further improving the structural stability of the surface layer.

5-8 parts of ceramic powder.

By adopting the technical scheme, the anti-frost-crack asphalt is better in wear resistance, more wear-resistant in surface layer and less prone to wear by adding the ceramic powder, and the service life of the pavement is prolonged.

The invention is further configured to: the preparation method of the frost cracking resistant asphalt comprises the following steps:

s1, grinding meso-tetra (4-carboxyphenyl) porphin into powder with the particle size of 10-100 nm;

s2, uniformly stirring the asphalt and the meso-tetra (4-carboxyphenyl) porphin powder to form an asphalt premix;

s3, adding fine aggregate into the asphalt premix, and uniformly stirring to form an asphalt mixture;

and S4, adding the coarse aggregate into the asphalt mixture, and uniformly stirring to form the anti-cracking asphalt.

By adopting the technical scheme, the asphalt and the meso-tetra (4-carboxyphenyl) porphin are uniformly stirred, so that the meso-tetra (4-carboxyphenyl) porphin is uniformly dispersed in the asphalt, then the fine aggregate is added, and finally the coarse aggregate is added, so that the fine aggregate is easy to uniformly disperse, the condition that the fine aggregate and the meso-tetra (4-carboxyphenyl) porphin are uniformly dispersed after the coarse aggregate is added is reduced, and the quality of the anti-freeze asphalt is ensured.

In conclusion, the invention has the following beneficial effects:

1. the brittle point of the anti-freeze asphalt is effectively reduced by adding the meso-tetra (4-carboxyphenyl) porphine into the asphalt, so that an asphalt surface layer cast by the anti-freeze asphalt can bear colder weather, and the condition that the pavement is cracked due to cold shrinkage of the surface layer is not easy to occur;

2. through adding polypyrrole and matching copper powder, a better conductive loop is formed, so that static electricity generated by friction of the tire on an asphalt surface layer is easier to absorb than the asphalt surface layer, the static electricity is not easy to generate, and the static electricity harm is reduced;

3. the glass fiber is matched with the activated carbon particles to reinforce the anti-frost crack asphalt, so that the anti-rutting performance of the asphalt surface layer is good, and the asphalt surface layer is not easy to deform.

Drawings

FIG. 1 is a schematic flow chart of a preparation method of the anti-frost cracking asphalt of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

In the following examples, No. 70 petrochemical asphalt sold by Shandong Boheng Jingmai Co., Ltd was used as asphalt.

In the following examples, meso-tetra (4-carboxyphenyl) porphin, available from Zhengzhou alpha chemical Co., Ltd, CAS number: 14609-54-2.

In the following examples, crushed stone sold by Asahi building materials Co., Ltd, Hebeike was used as the coarse aggregate.

In the following examples, the fine aggregate is river sand sold by eight metallurgy engineering practice Co., Ltd, Shenzhen.

In the following examples, copper powder sold by Beijing Xinglong Yuan science and technology Co.

In the following examples, polypyrrole was used as it is, and polypyrrole was sold by Korea Jinle industries, Ltd.

In the following examples, the glass fibers are those sold by Jiangsu Kandafu New Material science and technology, Inc.

In the following examples, the activated carbon particles are bamboo charcoal particles sold by Liao trade Co., Ltd.

In the following examples, fumed silica is sold by Kyoho chemical Co., Ltd.

In the following examples, the ceramic powder is a nano wear-resistant ceramic powder sold by the Ganglong mineral processing factory in Lingshou county.

Example 1

Referring to fig. 1, the preparation method of the anti-freeze-cracking asphalt comprises the following steps:

s1, putting meso-tetra (4-carboxyphenyl) porphin into a grinding machine, and grinding the meso-tetra (4-carboxyphenyl) porphin into powder with the particle size of 10-100 nm;

s2, adding 100kg of asphalt and 25kg of meso-tetra (4-carboxyphenyl) porphin powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), rotating at 90r/min, and stirring for 10min to form an asphalt premix;

s3, adding 100kg of fine aggregate into the asphalt premix in a stirring kettle, keeping the temperature at 160 ℃, stirring at a rotating speed of 65r/min for 8min to form an asphalt mixture;

s4, adding 200kg of coarse aggregate into the asphalt mixture in a stirring kettle, keeping the temperature at 160 ℃, stirring for 15min at the rotating speed of 40r/min to form the anti-freeze-cracking asphalt, and continuously stirring until the use is finished at the rotating speed of 15 r/min.

Example 2

s2, adding 100kg of asphalt and 30kg of meso-tetra (4-carboxyphenyl) porphin powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), rotating at 90r/min, and stirring for 10min to form an asphalt premix;

s3, adding 150kg of fine aggregate into the asphalt premix in a stirring kettle, keeping the temperature at 160 ℃, stirring at a rotating speed of 65r/min for 8min to form an asphalt mixture;

s4, adding 250kg of coarse aggregate into the asphalt mixture in a stirring kettle, keeping the temperature at 160 ℃, stirring for 15min at the rotating speed of 40r/min to form the anti-freeze-cracking asphalt, and continuously stirring until the use is finished at the rotating speed of 15 r/min.

Example 3

s2, adding 100kg of asphalt and 35kg of meso-tetra (4-carboxyphenyl) porphin powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), rotating at 90r/min, and stirring for 10min to form an asphalt premix;

s3, adding 200kg of fine aggregate into the asphalt premix in a stirring kettle, keeping the temperature at 160 ℃, stirring at a rotating speed of 65r/min for 8min to form an asphalt mixture;

s4, adding 300kg of coarse aggregate into the asphalt mixture in a stirring kettle, keeping the temperature at 160 ℃, stirring for 15min at the rotating speed of 40r/min to form the anti-freeze-cracking asphalt, and continuously stirring until the use is finished at the rotating speed of 15 r/min.

Example 4

s2, adding 100kg of asphalt and 32kg of meso-tetra (4-carboxyphenyl) porphin powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), rotating at 90r/min, and stirring for 10min to form an asphalt premix;

s3, adding 180kg of fine aggregate into the asphalt premix in a stirring kettle, keeping the temperature at 160 ℃, stirring at a rotating speed of 65r/min for 8min to form an asphalt mixture;

and S4, adding 260kg of coarse aggregate into the asphalt mixture in a stirring kettle, keeping the temperature at 160 ℃, stirring for 15min at the rotating speed of 40r/min to form the anti-freeze-cracking asphalt, and continuously stirring until the use is finished at the rotating speed of 15 r/min.

Example 5

s2, adding 100kg of asphalt, 32kg of meso-tetra (4-carboxyphenyl) porphin powder, 10kg of copper powder, 15kg of polypyrrole, 10kg of glass fiber, 3kg of activated carbon particles, 15kg of fumed silica and 5kg of ceramic powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), rotating at 90r/min, and stirring for 10min to form an asphalt premix;

The length of the glass fibers in this example was 10 mm.

The particle size of the activated carbon particles in this example was 1 mm.

Example 6

s2, adding 100kg of asphalt, 32kg of meso-tetra (4-carboxyphenyl) porphin powder, 15kg of copper powder, 20kg of polypyrrole, 12kg of glass fiber, 4kg of activated carbon particles, 17kg of fumed silica and 6kg of ceramic powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), rotating at 90r/min, and stirring for 10min to form an asphalt premix;

The length of the glass fiber in this example was 12 mm.

The particle size of the activated carbon particles in this example was 1.5 mm.

Example 7

s2, adding 100kg of asphalt, 32kg of meso-tetra (4-carboxyphenyl) porphin powder, 20kg of copper powder, 25kg of polypyrrole, 15kg of glass fiber, 5kg of activated carbon particles, 20kg of fumed silica and 8kg of ceramic powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), rotating at 90r/min, and stirring for 10min to form an asphalt premix;

The length of the glass fiber in this example was 15 mm.

The particle size of the activated carbon particles in this example was 2 mm.

Example 8

s2, adding 100kg of asphalt, 32kg of meso-tetra (4-carboxyphenyl) porphin powder, 18kg of copper powder, 22kg of polypyrrole, 14kg of glass fiber, 5kg of activated carbon particles, 18kg of fumed silica and 5kg of ceramic powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), rotating at 90r/min, and stirring for 10min to form an asphalt premix;

The length of the glass fiber in this example was 12 mm.

The particle size of the activated carbon particles in this example was 1 mm.

Example 9

The utility model provides a frost crack prevention road surface, includes bed course, basic unit and the surface course of upwards laying in proper order along vertical direction.

The bed course is laid on the soil basic unit, and the bed course adopts grit and gravel to lay in order to form the water permeability bed course, and the proportion of grit and gravel is 2: 1, the thickness of the cushion layer is 16 cm.

The base layer is formed by paving broken stones, and the thickness of the base layer is 20 cm.

The surface layer is formed by paving asphalt, and the thickness of the surface layer is 8 cm.

In this example, the anti-split asphalt of example 8 was used as the asphalt, and in other examples, the anti-split asphalt of examples 1 to 7 was used.

Comparative example 1

The preparation method of the anti-cracking asphalt comprises the following steps:

s1, adding 100kg of asphalt, 18kg of copper powder, 22kg of polypyrrole, 14kg of glass fiber, 5kg of activated carbon particles, 18kg of fumed silica and 5kg of ceramic powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), rotating at 90r/min, and stirring for 10min to form an asphalt premix;

s2, adding 180kg of fine aggregate into the asphalt premix in a stirring kettle, keeping the temperature at 160 ℃, stirring at a rotating speed of 65r/min for 8min to form an asphalt mixture;

s3, adding 260kg of coarse aggregate into the asphalt mixture in a stirring kettle, keeping the temperature at 160 ℃, stirring for 15min at the rotating speed of 40r/min to form the anti-freeze-cracking asphalt, and continuously stirring until the use is finished at the rotating speed of 15 r/min.

The length of the glass fiber in this comparative example was 12 mm.

The particle diameter of the activated carbon particles in this comparative example was 1 mm.

Comparative example 2

s2, adding 100kg of asphalt, 32kg of meso-tetra (4-carboxyphenyl) porphin powder, 22kg of polypyrrole, 14kg of glass fiber, 5kg of activated carbon particles, 18kg of fumed silica and 5kg of ceramic powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), stirring at a rotating speed of 90r/min for 10min to form an asphalt premix;

The length of the glass fiber in this comparative example was 12 mm.

Comparative example 3

s2, adding 100kg of asphalt, 32kg of meso-tetra (4-carboxyphenyl) porphin powder, 14kg of glass fiber, 5kg of activated carbon particles, 18kg of fumed silica and 5kg of ceramic powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), rotating at 90r/min, and stirring for 10min to form an asphalt premix;

The length of the glass fiber in this comparative example was 12 mm.

Comparative example 4

s2, adding 100kg of asphalt, 32kg of meso-tetra (4-carboxyphenyl) porphin powder, 18kg of copper powder, 22kg of polypyrrole, 18kg of fumed silica and 5kg of ceramic powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), rotating at 90r/min, and stirring for 10min to form an asphalt premix;

The length of the glass fiber in this comparative example was 12 mm.

Comparative example 5

s2, adding 100kg of asphalt, 32kg of meso-tetra (4-carboxyphenyl) porphin powder, 18kg of copper powder, 22kg of polypyrrole, 14kg of glass fiber, 5kg of activated carbon particles and 5kg of ceramic powder into a stirring kettle, heating to 160 ℃ (heating to 150 ℃, 170 ℃, 180 ℃ and the like in other embodiments), stirring at a rotating speed of 90r/min for 10min to form an asphalt premix;

The length of the glass fiber in this comparative example was 12 mm.

Experiment 1

The frost cracking resistant asphalts of examples 1-8 and comparative examples 1-5 were subjected to an asphalt mix rutting test using a rutting machine under standard conditions of 60 ℃ and 0.7MPa, and the dynamic stability (times/mm) of the test specimens prepared from the frost cracking resistant asphalts of examples 1-8 and comparative examples 1-5 was recorded.

Experiment 2

The frost crack prevention asphalts of examples 1-8 and comparative examples 1-5 were subjected to an asphalt brittleness test (frass method) by an asphalt brittleness tester, and brittleness points of the samples prepared from the frost crack prevention asphalts of examples 1-8 and comparative examples 1-5 were recorded.

Experiment 3

The specific resistance of the frost crack prevention asphalts of examples 1 to 8 and comparative examples 1 to 5 was measured with a universal meter, the frost crack prevention asphalts were poured into a tubular mold having a length of 10cm and a diameter of 1cm, a sample bar was formed by cooling and demolding, and the specific resistance was calculated by detecting the resistance between both ends of the sample bar with the universal meter.

Experiment 4

The compressive strength of the samples prepared from the frost crack prevention asphalts of examples 1-8 and comparative examples 1-5 was tested according to ASTM D1074-2009 Standard test method for compressive Strength of asphalt mixture.

The specific experimental data are shown in Table 1

TABLE 1

According to the table 1, it can be obtained that which meso-tetra (4-carboxyphenyl) porphine is added to the frost crack prevention asphalt can effectively reduce the brittle point of the frost crack prevention asphalt, so that a surface layer prepared from the frost crack prevention asphalt is not easy to frost crack, and the frost crack prevention pavement is stable in structure and not easy to frost crack.

By adding the copper powder and the polypyrrole into the anti-frost-crack asphalt, the resistance of a surface layer can be effectively reduced, static electricity generated by friction between a tire and the road surface can be more easily led into the road surface and conducted by the road surface, and the static electricity harm is reduced.

By adding the glass fiber, the activated carbon particles, the copper powder and the fumed silica into the anti-frost crack asphalt, the dynamic stability of the surface layer is effectively improved, the anti-rutting performance of the pavement is better, the structure is stable, the deformation is not easy, and the service life is longer.

The anti-freezing asphalt prepared by each embodiment has better compressive strength, and the prepared surface layer has better structural stability.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a frost crack prevention road surface, includes upwards the bed course, basic unit and the surface course of laying in proper order along vertical direction, characterized by: the surface layer is formed by paving anti-cracking asphalt, and the anti-cracking asphalt comprises the following components in parts by weight:

100 parts of asphalt;

25-35 parts of meso-tetra (4-carboxyphenyl) porphin

200 portions and 300 portions of coarse aggregate;

100 portions and 200 portions of fine aggregate;

10-20 parts of copper powder;

15-25 parts of polypyrrole;

10-15 parts of glass fiber;

the length of the glass fiber is 10-15 mm.

2. The frost crack resistant pavement of claim 1, wherein: the frost cracking prevention asphalt also comprises the following components in parts by weight:

3-5 parts of activated carbon particles;

the particle size of the active carbon particles is 1-2 mm.

3. The frost crack resistant pavement of claim 1, wherein: the frost cracking prevention asphalt also comprises the following components in parts by weight:

15-20 parts of fumed silica.

4. The frost crack resistant pavement of claim 1, wherein: the frost cracking prevention asphalt also comprises the following components in parts by weight:

5-8 parts of ceramic powder.

5. The frost crack resistant pavement of claim 1, wherein: the preparation method of the frost cracking resistant asphalt comprises the following steps: