阅读说明：本技术 一种溶剂型冷补沥青及道路坑槽修补方法 (Solvent type cold-patch asphalt and road pit repairing method ) 是由 韦漪铧 吴伟亮 张文杰 于 2021-08-11 设计创作，主要内容包括：本发明涉及道路修补领域,具体公开了一种溶剂型冷补沥青及道路坑槽修补方法,一种溶剂型冷补沥青,包括以下质量份数的组分：石油沥青100份；聚苯醚10-12份；聚亚苯基砜树脂3-5份；石粉800-1000份；生物基添加剂4-5份；溶剂25-30份；抗剥落剂0.4-0.6份。一种道路坑槽修补方法,包括以下步骤：步骤1),将溶剂型冷补沥青注入坑槽中至与坑槽顶部平齐；步骤2),静置30-35min,再次将溶剂型冷补沥青注入坑槽中至与坑槽顶部平齐；步骤3),静置1h及以上,恢复交通。本发明的溶剂型冷补沥青具有降低道路坑槽修补时的操作难度并保持修补质量较高的优点,本发明的道路坑槽修补方法具有工艺步骤简单的优点。(The invention relates to the field of road repair, and particularly discloses a solvent-based cold-patch asphalt and a method for repairing a road pit, wherein the solvent-based cold-patch asphalt comprises the following components in parts by weight: 100 parts of petroleum asphalt; 10-12 parts of polyphenyl ether; 3-5 parts of polyphenylene sulfone resin; 800 portions of stone powder and 1000 portions of stone powder; 4-5 parts of bio-based additive; 25-30 parts of a solvent; 0.4-0.6 part of anti-stripping agent. A road pit repairing method comprises the following steps: step 1), injecting solvent type cold patch asphalt into the pit slot until the solvent type cold patch asphalt is flush with the top of the pit slot; step 2), standing for 30-35min, and injecting the solvent type cold patch asphalt into the pit until the solvent type cold patch asphalt is flush with the top of the pit; and 3), standing for 1 hour or more, and recovering traffic. The solvent-based cold-patch asphalt has the advantages of reducing the operation difficulty during the repair of the road pits and keeping the repair quality higher, and the method for repairing the road pits has the advantage of simple process steps.)

1. A solvent-based cold patch asphalt is characterized in that: the paint comprises the following components in parts by mass:

100 parts of petroleum asphalt;

10-12 parts of polyphenyl ether;

3-5 parts of polyphenylene sulfone resin;

800 portions of stone powder and 1000 portions of stone powder;

4-5 parts of bio-based additive;

25-30 parts of a solvent;

0.4-0.6 part of anti-stripping agent.

2. The solvent-based cold-patch asphalt of claim 1, which is characterized in that: the paint comprises the following components in parts by mass:

100 parts of petroleum asphalt;

10.5-11.5 parts of polyphenyl ether;

3.5-4.5 parts of polyphenylene sulfone resin;

850 portions and 950 portions of stone powder;

4.2-4.8 parts of bio-based additive;

27-29 parts of a solvent;

0.45-0.55 part of anti-stripping agent.

3. A solvent-based cold-patch asphalt as claimed in claim 2, characterized in that: the solvent is the compound of toluene, chloroform and diesel oil.

4. A solvent-based cold-patch asphalt according to claim 3, characterized in that: the mass ratio of the toluene to the chloroform to the diesel oil is 1: 0.3: 0.7.

5. a solvent-based cold-patch asphalt as claimed in claim 2, characterized in that: the stone powder is a compound of calcite powder, wollastonite powder and dolomite powder.

6. The solvent-based cold-patch asphalt of claim 5, which is characterized in that: the mass ratio of the calcite powder to the wollastonite powder to the dolomite powder is 1: 0.8: 0.2.

7. a solvent-based cold-patch asphalt as claimed in claim 2, characterized in that: the bio-based additive is wood fiber.

8. A method for repairing a road pit using the solvent-based cold patch asphalt according to any one of claims 1 to 7, comprising: the method comprises the following steps:

step 1), injecting solvent type cold patch asphalt into the pit slot until the solvent type cold patch asphalt is flush with the top of the pit slot;

step 2), standing for 30-35min, and injecting the solvent type cold patch asphalt into the pit until the solvent type cold patch asphalt is flush with the top of the pit;

and 3), standing for 1 hour or more, and recovering traffic.

Technical Field

The invention relates to the field of road repair, in particular to solvent type cold repair asphalt and a method for repairing a road pit.

Background

The asphalt road surface is soft, the driving comfort is higher, it is one of the road types widely used at present, the asphalt road adopts asphalt concrete to lay the road surface, and the asphalt concrete mainly depends on asphalt to bond aggregate so as to form a stable structure, but the asphalt itself is organic matter, receive the influence of temperature and the influence of stress fatigue, can make the asphalt road surface appear the damage such as pit crack easily, generally to the damage of asphalt road surface can renovate through the hot in-place regeneration technique, but hot in-place regeneration technique needs to heat the road surface, need to transport large-scale ground heating equipment to the damaged highway section, still need to mix new and old asphalt concrete evenly after heating, then pave again, then flatten again, lead to the repair process complicated, lead to the road pit repair time operation degree of difficulty great, therefore, still have the space of improving.

Disclosure of Invention

In order to reduce the operation difficulty in road pit repairing, the application provides a solvent-based cold-patch asphalt and a road pit repairing method.

In a first aspect, the application provides a solvent-based cold patch asphalt, which adopts the following technical scheme:

the solvent type cold patch asphalt comprises the following components in parts by weight:

100 parts of petroleum asphalt;

10-12 parts of polyphenyl ether;

3-5 parts of polyphenylene sulfone resin;

800 portions of stone powder and 1000 portions of stone powder;

4-5 parts of bio-based additive;

25-30 parts of a solvent;

0.4-0.6 part of anti-stripping agent.

Preferably, the composition comprises the following components in parts by mass:

100 parts of petroleum asphalt;

10.5-11.5 parts of polyphenyl ether;

3.5-4.5 parts of polyphenylene sulfone resin;

850 portions and 950 portions of stone powder;

4.2-4.8 parts of bio-based additive;

27-29 parts of a solvent;

0.45-0.55 part of anti-stripping agent.

By adopting the technical scheme, the solvent is dissolved and diluted, so that the solvent type cold-patch asphalt can obtain better fluidity without heating, the solvent type cold-patch asphalt has plasticity and fluidity after being injected into a road pit groove, when a wheel is rolled, the solvent type cold-patch asphalt can be extruded to an irregular place in the pit groove, the solvent is gradually volatilized under the action of a driving vehicle and air, the movement of asphalt molecular chains is blocked, the asphalt is gradually thickened, the distribution among aggregates is tighter, the void ratio is reduced, the aggregates are more firmly bonded with each other, so that the strength of the solvent type cold-patch asphalt is gradually increased, the pavement is gradually hardened, the repair of the road pit groove is completed, after the repair, the strength of the solvent type cold-patch asphalt is continuously increased, and after about three months, the strength and the gradual deformation of the solvent type cold-patch asphalt reach a stable limit state, the method has the advantages that the requirements of the pavement performance are met or even surpassed, heating is not needed in the repairing process, and the solvent type cold repair asphalt is compacted, so that a large number of complicated process steps are reduced, and the operation difficulty in repairing the road pits is reduced.

By matching with polyphenyl ether and polyphenylene sulfone resin, the solvent type cold repair asphalt has higher strength, stronger viscosity, better repair effect, difficult cracking and difficult damage after the solvent is volatilized.

The inventor guesses that the molecular chains of the polyphenyl ether and the polyphenylene sulfone resin are mutually entangled with the molecular chain of the petroleum asphalt, and the polyphenyl ether molecular chain has better mechanical strength, stress relaxation resistance and creep resistance, so that the molecular chain of the polyphenyl ether is stable in structure and not easy to deform after a solvent is volatilized, the movement of the molecular chain of the petroleum asphalt is limited by the entanglement with the molecular chain of the petroleum asphalt, the rutting resistance of the solvent type cold patch asphalt is improved after the solvent is volatilized, the impact caused by the wheel stroke can be effectively shared by the auxiliary stress of the molecular chain of the polyphenyl ether, the repaired road surface is not easy to be damaged again, the polyphenylene sulfone resin also has good creep resistance, the rigidity and the toughness are better, and the polyphenylene ether molecular chain is matched with the molecular chain of the petroleum asphalt to be entangled together, the movement of the molecular chain of the petroleum asphalt can be well limited, the repaired road surface is not easy to deform, the anti-rutting performance is high, the effect of assisting in resisting impact caused by a vehicle form is good, the repaired road surface is not easy to crack and break again, and when the polyphenyl ether and the polyphenylene sulfone resin are matched in a specific proportion, the effect of entanglement with molecular chains of the petroleum asphalt is good, probably because the polyphenyl ether and the polyphenylene sulfone resin have different molecular chain structures, the polyphenyl ether and the polyphenylene sulfone resin are just filled or entangled in different parts of the molecular chains of the petroleum asphalt or are entangled with the molecular chains of different molecular structures in the petroleum asphalt, so that the effect of modifying the solvent type cold patch asphalt is very obvious, and when the solvent type cold patch asphalt is adopted to repair the road pit, the operation difficulty during road pit repair is reduced, and meanwhile, the engineering quality can be well guaranteed.

By adopting the stone powder as the aggregate, the solvent-based cold-patch asphalt is easy to permeate into cracks, the surfaces of the side wall, the bottom and the like of the road pit are not completely smooth and flat after the road pit is formed, a large number of cracks usually exist, and the solvent-based cold-patch asphalt can easily go deep into the cracks to repair the cracks due to the small particle size of the aggregate, so that the engineering quality is better ensured while the operation difficulty in repairing the road pit is reduced.

By adding the anti-stripping agent, the solvent type cold patch asphalt is not easy to strip when a wheel passes through, so that the solvent can gradually volatilize in the pit slot, and the repairing effect on the road pit slot is ensured.

By adding the bio-based additive, the solvent type cold patch asphalt is modified, and meanwhile, the solvent type cold patch asphalt is easy to obtain, belongs to a material for sustainable production, reduces the cost, reduces the environmental pollution and is friendly to the environment.

Preferably, the solvent is a compound of toluene, chloroform and diesel oil.

Preferably, the mass ratio of the toluene to the chloroform to the diesel oil is 1: 0.3: 0.7.

by adopting the technical scheme, the petroleum asphalt is well diluted by compounding the toluene, the chloroform and the diesel oil, and both the polyphenyl ether and the polyphenylene sulfone resin can be well dissolved so as to ensure the fluidity of the solvent type cold patch asphalt and further ensure the quality of the repaired road.

Preferably, the stone powder is a compound of calcite powder, wollastonite powder and dolomite powder.

Preferably, the mass ratio of the calcite powder to the wollastonite powder to the dolomite powder is 1: 0.8: 0.2.

by adopting the technical scheme, the aggregate has stronger pressure resistance and can stably bear the pressure of a vehicle by compounding the calcite powder, the wollastonite powder and the dolomite powder, and meanwhile, the dolomite powder plays a role in lubricating, so that the fluidity of the solvent-based cold-patch asphalt is improved, and the quality of road repair is improved.

Preferably, the bio-based additive is wood fiber.

By adopting the technical scheme, the solvent type cold-patch asphalt is physically reinforced by adding the wood fiber, so that the asphalt after the solvent volatilization has better physical property and is not easy to damage.

In a second aspect, the present application provides a method for repairing a road pit using the solvent-based cold patch asphalt, which adopts the following technical scheme:

a road pit repairing method adopting the solvent-based cold-patch asphalt comprises the following steps:

step 1), injecting solvent type cold patch asphalt into the pit slot until the solvent type cold patch asphalt is flush with the top of the pit slot;

step 2), standing for 30-35min, and injecting the solvent type cold patch asphalt into the pit until the solvent type cold patch asphalt is flush with the top of the pit;

and 3), standing for 1 hour or more, and recovering traffic.

By adopting the technical scheme, the solvent type cold patch asphalt is adopted for repairing, new and old asphalt does not need to be heated, various complex devices are not needed, the process steps are simple, the operation difficulty of road pit repairing construction is effectively reduced, and the method is easy to popularize.

In summary, the present application has the following beneficial effects:

1. because the solvent is dissolved and diluted, the solvent type cold patch asphalt can obtain better fluidity without heating, the solvent type cold patch asphalt has plasticity and fluidity after being injected into a road pit groove, when wheels are rolled, the solvent type cold patch asphalt can be extruded to an irregular place in the pit groove, the solvent is gradually volatilized under the action of driving and air, the movement of asphalt molecular chains is blocked, the asphalt is gradually thickened, the distribution of aggregates is tighter, the void ratio is reduced, the aggregates are more firmly bonded with each other, so that the strength of the solvent type cold patch asphalt is gradually increased, the road surface is gradually hardened, the repair of the road pit groove is completed, the strength of the solvent type cold patch asphalt is continuously increased after the repair, and the strength and the deformation of the solvent type cold patch asphalt gradually reach a stable limit state after about three months and even exceed the requirement of the performance of the road surface, and the repairing process does not need heating, and the solvent-based cold repair asphalt is compacted, so that a large number of complicated process steps are reduced, and the operation difficulty in repairing the road pit slot is reduced.

2. Polyphenyl ether and polyphenylene sulfone resin are preferably added in the solvent type cold repair asphalt, so that the solvent type cold repair asphalt has high strength, strong viscosity, good repair effect, difficult cracking and difficult damage after the solvent is volatilized.

3. In the application, the toluene, the chloroform and the diesel oil are preferably compounded, so that the petroleum asphalt is well diluted, and the polyphenyl ether and the polyphenylene sulfone resin can be well dissolved, so that the fluidity of the solvent type cold patch asphalt is ensured, and the quality of the repaired road is ensured.

4. According to the method, the solvent type cold patch asphalt is adopted for repairing, new and old asphalt does not need to be heated, various complex devices are not needed, the process steps are simple, the operation difficulty of road pit repairing construction is effectively reduced, and the method is easy to popularize.

Detailed Description

The present application will be described in further detail with reference to examples.

The information on the source of the raw materials used in the following examples and comparative examples is shown in Table 1.

TABLE 1

Raw materials	Source information
		Petroleum asphalt	Qilu petrochemical No. 90 petroleum asphalt
Polyphenylene ether	Saber base, brand GFN1520V
		Polyphenylene sulfone resin	U.S. Suwei, brand D-2500
Calcite powder	Lingshou Tianlong mineral processing factory, 600 mesh
		Wollastonite powder	Jiangxi Cheng Hai Yuan New Material Co., Ltd, 800 mesh
Dolomite powder	Lingshou county Yongshun mineral processing plant, 1250 mesh
		Wood fiber	Erjiazha new materials science and technology Limited, average length 2mm
Toluene	Ministry of chemical engineering, Inc. of Mao Ministry
		Chloroform	Chloroform, trypan, Shanghai
Diesel oil	Wuhan CityBoyu Hongymatization energy limited company, 0# diesel oil
		Anti-stripping agent	Shandong Junda Highway maintenance Co., Ltd, model GL-JD

Examples 1 to 5

A solvent-based cold patch asphalt comprises the following components:

petroleum asphalt, polyphenyl ether, polyphenylene sulfone resin, stone powder, bio-based additives, solvents and anti-stripping agents.

In examples 1 to 5, the specific amounts (in Kg) of the respective raw materials to be charged are specified in Table 2.

TABLE 2

In examples 1-5, the solvent is a mixture of toluene, chloroform and diesel, and the mass ratio of toluene, chloroform and diesel is 1: 0.3: 0.7.

in examples 1 to 5, the stone powder is a mixture of calcite powder, wollastonite powder and dolomite powder, wherein the mass ratio of the calcite powder to the wollastonite powder to the dolomite powder is 1: 0.8: 0.2.

in examples 1-5, the bio-based additive was wood fiber.

In examples 1-5, solvent-based cold patch asphalt was prepared as follows:

putting petroleum asphalt, polyphenyl ether, polyphenylene sulfone resin and a solvent into a shear mixer, carrying out high-speed shear mixing for 30min at the rotating speed of 600r/min, then adding stone powder, a bio-based additive and an anti-stripping agent, carrying out shear mixing for 20min at the rotating speed of 200r/min, and obtaining the solvent type cold patch asphalt.

Example 6

A road pit repairing method comprises the following steps:

step 1), enclosing the road pit and groove, and injecting the solvent type cold patch asphalt into the pit and groove until the solvent type cold patch asphalt is flush with the top of the pit and groove, namely the surface of the pavement.

And 2) standing for 30min, so that part of the solvent type cold patch asphalt permeates into cracks to cause the liquid level of the solvent type cold patch asphalt in the pit to be lowered, and injecting the solvent type cold patch asphalt into the pit again until the solvent type cold patch asphalt is flush with the top of the pit.

And 3), standing and maintaining for 1h, removing the enclosure and recovering the traffic.

In this example, the solvent-based cold patch asphalt of example 1 was used as the solvent-based cold patch asphalt.

Example 7

A road pit repairing method comprises the following steps:

step 1), enclosing the road pit and groove, and injecting the solvent type cold patch asphalt into the pit and groove until the solvent type cold patch asphalt is flush with the top of the pit and groove, namely the surface of the pavement.

And 2) standing for 35min, wherein part of the solvent type cold-patch asphalt permeates into cracks to cause the liquid level of the solvent type cold-patch asphalt in the pit to be lowered, and injecting the solvent type cold-patch asphalt into the pit again until the solvent type cold-patch asphalt is flush with the top of the pit.

And 3), standing and maintaining for 1.5h, removing the enclosure and recovering the traffic.

In this example, the solvent-based cold patch asphalt of example 2 was used as the solvent-based cold patch asphalt.

Example 8

Compared with the embodiment 6, the road pit repairing method only has the following differences:

in this example, the solvent-based cold patch asphalt of example 3 was used as the solvent-based cold patch asphalt.

Example 9

Compared with the embodiment 6, the road pit repairing method only has the following differences:

in this example, the solvent-based cold patch asphalt of example 4 was used as the solvent-based cold patch asphalt.

Example 10

Compared with the embodiment 6, the road pit repairing method only has the following differences:

in this example, the solvent-based cold patch asphalt of example 5 was used as the solvent-based cold patch asphalt.

Comparative example 1

A solvent-based cold patch asphalt, which differs from example 5 only in that:

the specific amount of polyphenylene ether added was 14Kg and the specific amount of polyphenylene sulfone resin added was 1 Kg.

Comparative example 2

A solvent-based cold patch asphalt, which differs from example 5 only in that:

the specific input amount of the polyphenylene ether is 8Kg, and the specific input amount of the polyphenylene sulfone resin is 7 Kg.

Comparative example 3

A solvent-based cold patch asphalt, which differs from example 5 only in that:

the polyphenylene sulfone resin is replaced by stone powder with the same amount.

Comparative example 4

A solvent-based cold patch asphalt, which differs from example 5 only in that:

the polyphenylene oxide is replaced by stone powder in equal amount.

Comparative example 5

A solvent-based cold patch asphalt, which differs from example 5 only in that:

the polyphenylene sulfone resin and the polyphenylene oxide are equivalently replaced by stone powder.

Experiment 1

The samples made of the solvent type cold patch asphalt prepared in the examples 1-5 and the comparative examples 1-5 were subjected to an asphalt mixture rutting test under standard conditions of 60 ℃ and 0.7MPa by using a rutting tester, wherein the solvent type cold patch asphalt was injected into a mold during sample preparation, and the mold was allowed to stand for 90 days to obtain a sample, which was then tested, and the dynamic stability (times/mm) of the sample was recorded.

Experiment 2

The compressive strength of the samples prepared from the solvent type cold patch asphalt prepared in examples 1 to 5 and comparative examples 1 to 5 was tested according to ASTM D1074-2009 Standard test method for compressive Strength of asphalt mixture, wherein the samples were prepared by injecting the solvent type cold patch asphalt into a mold and allowing the mold to stand for 90 days to obtain samples for testing.

The specific assay data for experiments 1 and 2 are detailed in table 3.

TABLE 3

	Degree of dynamic stability (times/mm)	Compressive strength (MPa)
			Example 1	4531	6.31
Example 2	4537	6.36
			Example 3	4543	6.34
Example 4	4528	6.28
			Example 5	4569	6.38
Comparative example 1	4027	5.86
			Comparative example 2	3982	5.81
Comparative example 3	3868	5.75
			Comparative example 4	3713	5.72
Comparative example 5	3436	5.51

According to the comparison of the data of example 5 and comparative examples 1-5 in table 3, the adding of polyphenylene ether and polyphenylene sulfone resin can improve the dynamic stability and compressive strength of the sample, and when polyphenylene ether and polyphenylene sulfone resin are compounded in a specific ratio, the modification effect is better, and when polyphenylene ether and polyphenylene sulfone resin are not compounded in a specific ratio, the modification effect is improved and obviously reduced, for this reason, the inventor guesses that it is possible that the molecular chains in petroleum asphalt have irregular structures and the petroleum asphalt contains a plurality of molecular chains with different molecular weights and different molecular structures, and polyphenylene ether and polyphenylene sulfone resin are just wound on the molecular chains with different structures or just wound in different areas of the molecular chain irregular structures, respectively, and when polyphenylene ether or polyphenylene sulfone resin is excessive, the space for winding polyphenylene ether or polyphenylene sulfone resin is insufficient in the molecular chains in petroleum asphalt, it may cause that an excessive amount of polyphenylene ether or polyphenylene sulfone resin is difficult to entangle with the molecular chain of petroleum asphalt, thereby causing that the improvement of the modification effect is not significant any more, and therefore, it is possible that only when polyphenylene ether or polyphenylene sulfone resin is compounded in a specific ratio, the space can be fully utilized to achieve more entangling, thereby optimizing the modification effect of petroleum asphalt.

According to the data of the embodiments 1 to 5, the dynamic stability and the compressive strength of the prepared sample reach higher levels, which are enough to meet the requirements of road driving, so that the repaired road structure is stable and is not easy to be damaged again.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.