Pit-pond repairing material and repairing method

Abstract

The invention provides a pit-pond repairing material and a repairing method, and belongs to the technical field of pavement repairing. The single-component polyurethane in the pit-pond repairing material provided by the invention can be used for effectively filling a pit pond, improving the repairing effect and prolonging the service life of a repaired pavement; basalt stones with continuous gradation are adopted as the aggregate, so that excellent compressive strength and wear resistance are achieved, it is ensured that the repaired pavement can bear loads and wear caused by vehicle running, meanwhile, uniform texture and a compact structure are achieved after the basalt stones are mixed with asphalt, and the repairing effect is improved; the polyurethane interface agent has excellent adhesion, chemical stability and good construction performance, not only can permeate into cracks and pores to be tightly combined with a bottom layer material, enhance the binding force between the repair material and a pavement and prevent impurities from permeating, but also has the capability of resisting chemical substance erosion and keeps the performance stability, and the service life of the repair material is prolonged. The adhesion and durability are maintained for a long time, and the repairing effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of road surface repair, and in particular relates to a pothole repair material and a repair method. Background Art

[0002] Asphalt pavement is the main structural method of road engineering in my country, with advantages such as driving comfort. However, under the influence of factors such as materials, construction technology and operating environment, some weak areas may become loose, resulting in potholes, which in turn affect driving safety and comfort. Especially in the rainy season, the erosion of rainwater exacerbates the deterioration of road conditions, making the pothole problem more serious.

[0003] The common solution to the asphalt pothole problem is to fill and repair it with cold-mix asphalt. However, cold-mix asphalt itself has insufficient adhesion, especially in humid environments, resulting in unsatisfactory pavement after repair. Especially in the rainy season, the interaction between rainwater and cold-mix asphalt causes the recently repaired pavement to loosen and separate. In better cases, the repaired pavement can be used for several months, but in worse cases, it can even be damaged after a few hours. Therefore, how to improve the repair effect of asphalt potholes and extend its use time after repair has become a technical problem that needs to be solved urgently in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a pothole repair material and a method for repairing the pothole. The pothole repair material provided by the present invention has an excellent repair effect on the pothole, and the service life of the road surface after repair can reach more than 15 years.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] The invention provides a pond repairing material, comprising asphalt, single-component polyurethane, aggregate and polyurethane interface agent; the aggregate is basalt stone with continuous gradation.

[0007] Preferably, the mass of the one-component polyurethane is 3-6% of the mass of the asphalt.

[0008] Preferably, the viscosity of the one-component polyurethane is 2000-8000 mPa.s.

[0009] Preferably, the particle size of the basalt stones with continuous grading and the mass content of each particle size are: 10-30% of 3-5 mm basalt stones, 20-40% of 5-10 mm basalt stones and 40-70% of 10-16 mm basalt stones.

[0010] Preferably, the mass of the asphalt is 4-6% of the mass of the aggregate.

[0011] Preferably, the pond restoration material also includes black color paste.

[0012] The present invention also provides a method for repairing a pond using the pond repair material described in the above technical solution, comprising the following steps:

[0013] (1) mixing asphalt, one-component polyurethane and aggregate to obtain a mixed material;

[0014] (2) applying a polyurethane interface agent to the surface of the pond to obtain a pond coated with the polyurethane interface agent;

[0015] (3) filling the mixture obtained in step (1) into the pit coated with the polyurethane interface agent obtained in step (2), and tamping the mixture to obtain a repaired road surface;

[0016] There is no chronological order for steps (1) and (2).

[0017] Preferably, the amount of polyurethane interface agent applied in step (2) is (0.5-1.5) kg / m 2 .

[0018] Preferably, the amount of polyurethane interface agent applied in step (2) is 1.5 kg / m 2 .

[0019] Preferably, in step (2), the pits and ponds are cut, asphalt mixture is removed and cleaned in sequence before the polyurethane interface agent is applied.

[0020] The invention provides a pond repairing material, comprising asphalt, single-component polyurethane, aggregate and polyurethane interface agent; the aggregate is basalt stone with continuous gradation. The single-component polyurethane in the pond repair material provided by the present invention has excellent elasticity and durability, can effectively fill the pond and improve the repair effect, it also has excellent adhesion and wear resistance, can be tightly combined with aggregate to form a strong and durable repair layer, it also has excellent anti-aging performance, can resist the erosion of natural factors such as ultraviolet rays and oxidation, and extend the service life of the repaired road surface; basalt stones with continuous grading are used as aggregates, which have excellent compressive strength and wear resistance, ensuring that the repaired road surface can withstand the load and wear caused by vehicle driving, and at the same time have a uniform texture and a tight structure after mixing with asphalt, thereby improving the repair effect; polyurethane interface agent is used, which has excellent adhesion, chemical stability and good construction performance, can not only penetrate into cracks and pores and tightly combine with the underlying material, enhance the bonding force between the repair material and the road surface, and prevent impurities from penetrating, but also has the ability to resist erosion by chemical substances, maintain its performance stability, maintain adhesion and durability for a long time, improve the repair effect, and have a fast curing speed. The results of the examples show that after the pothole repair material of the present invention is used for repair, the service life of the road surface can reach more than 15 years under normal use and maintenance conditions. DETAILED DESCRIPTION

[0021] The invention provides a pond repairing material, comprising asphalt, single-component polyurethane, aggregate and polyurethane interface agent; the aggregate is basalt stone with continuous gradation.

[0022] The pond repairing material provided by the present invention includes asphalt.

[0023] In the present invention, the type of the asphalt is preferably the same as the type of the original asphalt on the road surface of the pond to be repaired. The present invention has no special limitation on the source of the asphalt, and a commercial product known to those skilled in the art can be used, as long as it is the same as the type of the original asphalt on the road surface of the pond to be repaired.

[0024] The pond repair material provided by the present invention also includes a one-component polyurethane. In the present invention, the one-component polyurethane has excellent elasticity and durability, can effectively fill the pond and improve the repair effect, and has excellent adhesion and wear resistance, can be closely combined with aggregates to form a strong and durable repair layer, and has excellent anti-aging performance, can resist the erosion of natural factors such as ultraviolet rays and oxidation, and prolong the service life of the repaired road surface.

[0025] In the present invention, the mass of the one-component polyurethane is preferably 3-6% of the mass of asphalt. In the present invention, the appearance of the one-component polyurethane is preferably dark brown or brown viscous liquid; the viscosity (25°C) of the one-component polyurethane is preferably 2000-8000mPa.s; the density of the one-component polyurethane is preferably 1.15g / cm 3 ; The operating temperature of the one-component polyurethane is preferably room temperature; The gel time (25°C) of the one-component polyurethane is preferably 3 to 40 minutes; The mass content of non-volatile matter in the one-component polyurethane is preferably ≥96%; The surface drying time of the one-component polyurethane is preferably ≤2 hours. The present invention controls the dosage and physicochemical parameters of the one-component polyurethane within the above range, which can further improve the pond restoration effect.

[0026] The present invention has no particular limitation on the source of the one-component polyurethane, and a commercial product known to those skilled in the art can be used. In an embodiment of the present invention, the one-component polyurethane is preferably a one-component polyurethane of model JDH-D-06 produced by Shanghai Zhazha New Material Technology Co., Ltd.

[0027] The pond repair material provided by the present invention also includes aggregate.

[0028] In the present invention, the aggregate is basalt stone with continuous gradation. The present invention uses basalt stone with continuous gradation as aggregate, which has excellent compressive strength and wear resistance, ensuring that the repaired road surface can withstand the load and wear caused by vehicle driving, and at the same time has a uniform texture and a tight structure after mixing with asphalt, thereby improving the repair effect.

[0029] In the present invention, the mass of the asphalt is preferably 4-6% of the mass of the aggregate.

[0030] In the present invention, the particle size of the basalt stone with continuous gradation and the mass content of each particle size are preferably: 10-30% of 3-5 mm basalt stone, 20-40% of 5-10 mm basalt stone and 40-70% of 10-16 mm basalt stone. The present invention controls the amount of aggregate, the particle size of basalt stone and the mass content of each particle size within the above range, improves the uniformity of aggregate and the compactness after mixing with asphalt, and further improves the effect of pond repair.

[0031] The present invention has no particular limitation on the source of the aggregate, and commercially available products known to those skilled in the art may be used.

[0032] The pond repair material provided by the present invention also includes a polyurethane interface agent. The present invention uses a polyurethane interface agent, which has excellent adhesion, chemical stability and good construction performance. It can not only penetrate into cracks and pores and tightly combine with the underlying material, enhance the bonding force between the repair material and the road surface, and prevent impurities from penetrating, but also has the ability to resist chemical corrosion, maintain its performance stability, maintain adhesion and durability for a long time, improve the repair effect, and have a fast curing speed.

[0033] The present invention has no special limitation on the source of the polyurethane interface agent, and a commercial product known to those skilled in the art can be used. In an embodiment of the present invention, the polyurethane interface agent is preferably a polyurethane interface agent produced by Shanghai Zhazha New Material Technology Co., Ltd.

[0034] In the present invention, the pond repair material preferably also includes black color paste. The addition of black color paste in the present invention makes the repair material consistent with the original road surface color, improves the aesthetics after repair, makes the repair area have no color difference with the original road surface, and improves the overall appearance of the road surface.

[0035] The present invention has no special limitation on the amount of the black color paste, as long as the color of the repair material after adding the black color paste is consistent with the color of the original road surface.

[0036] The present invention has no particular limitation on the source of the black color paste. A commercially available product known to those skilled in the art can be used, which has excellent compatibility with other components in the repair material and does not affect the performance and stability of the repair material. In an embodiment of the present invention, the black color paste is preferably a black color paste of model 750 from Shanghai Yipin.

[0037] The invention controls the composition of the repair material and the dosage of each component, thereby improving the pond repair effect.

[0038] The present invention also provides a method for repairing a pond using the pond repair material described in the above technical solution, comprising the following steps:

[0039] (1) mixing asphalt, one-component polyurethane and aggregate to obtain a mixed material;

[0040] (2) applying a polyurethane interface agent to the surface of the pond to obtain a pond coated with the polyurethane interface agent;

[0041] (3) filling the mixture obtained in step (1) into the pit coated with the polyurethane interface agent obtained in step (2), and tamping the mixture to obtain a repaired road surface;

[0042] There is no chronological order for steps (1) and (2).

[0043] The invention mixes asphalt, single-component polyurethane and aggregate to obtain a mixed material.

[0044] The present invention has no special limitation on the mixing operation of the asphalt, the one-component polyurethane and the aggregate. The technical scheme of material mixing well known to those skilled in the art can be adopted to ensure that the components are mixed evenly.

[0045] In the present invention, black color paste is preferably added when the asphalt, one-component polyurethane and aggregate are mixed.

[0046] The invention coats the surface of the pond with a polyurethane interface agent to obtain the pond coated with the polyurethane interface agent.

[0047] In the present invention, the pond is preferably closed before treatment.

[0048] The present invention closes the construction area, prohibits vehicles and pedestrians from passing through, ensures the safe isolation of the construction area, and thus ensures construction safety and efficiency.

[0049] The present invention has no particular limitation on the manner of closing the construction area, and any manner known to those skilled in the art may be used. In the present invention, the manner of closing the construction area preferably includes at least one of setting up roadblocks and setting up warning signs.

[0050] In the present invention, the pit is preferably cut, asphalt mixture is removed and cleaned in sequence before the polyurethane interface agent is applied.

[0051] In the present invention, the cutting is preferably performed using a handheld cutting machine. In the present invention, the size of the cutting is preferably (40-60) cm*(40-60) cm; the thickness of the cutting is preferably consistent with the thickness of the original asphalt mixture layer of the road surface; during the cutting process, the cutting surface is preferably kept flat and vertical to ensure smooth construction of subsequent filling and repair materials.

[0052] The present invention has no special limitation on the operation of chiseling out the asphalt mixture, and the asphalt mixture in the pit after cutting can be chiseled out by adopting a technical solution well known to those skilled in the art.

[0053] The present invention has no special limitation on the cleaning operation, and the technical schemes well known to those skilled in the art can be used to clean up the debris and accumulated water in the pond. The present invention cleans the pond, which is more conducive to the subsequent application of polyurethane interface agent and filling repair material.

[0054] In the present invention, the coating amount of the polyurethane interface agent is preferably (0.5-1.5) kg / m 2 , more preferably (1 to 1.5) kg / m 2 The present invention controls the amount of polyurethane interface agent applied within the above range, which can further improve the restoration effect of the pond.

[0055] After obtaining the mixed material and the pit coated with the polyurethane interface agent, the present invention fills the mixed material into the pit coated with the polyurethane interface agent and compacts it to obtain the repaired road surface.

[0056] In the present invention, the operation of filling the mixed material into the pit where the polyurethane interface agent is applied is performed before the polyurethane interface agent is cured.

[0057] The present invention has no special limitation on the operation of filling the mixed material into the pond coated with the polyurethane interface agent, and a technical solution well known to those skilled in the art can be adopted. The present invention has no special limitation on the filling amount of the mixed material, and it is sufficient to ensure that the road surface is flat after compaction.

[0058] The present invention has no special limitation on the compaction operation, and a compaction technical solution well known to those skilled in the art can be used to ensure that the repair material is tight and has no gaps.

[0059] After the compaction is completed, the present invention preferably checks the compacted road surface to ensure that the road surface is flat. When the road surface is uneven after compaction, the present invention preferably trims the road surface. The present invention has no special limitation on the trimming operation, and the technical solution of trimming well known to those skilled in the art can be used to ensure that the road surface is flat.

[0060] After the compaction is completed, the present invention preferably waits for 20 to 40 minutes and then releases the closure to allow the road to return to normal traffic conditions.

[0061] The present invention allows the pond repair material to fully solidify by waiting for 20 to 40 minutes, thereby improving the repair effect.

[0062] After the potholes are repaired using the pothole repair material of the present invention, the service life of the repaired road surface can reach more than 15 years under normal use and maintenance conditions, and the repair time is very short and will not cause too much impact on traffic.

[0063] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0064] Example 1

[0065] The pond repair material consists of asphalt, 312.5 kg of one-component polyurethane (Shanghai Zhazha New Material Technology Co., Ltd., model JDH-D-06), aggregate (basalt stones with continuous grading, 28% of basalt stones of 3-5 mm, 32% of basalt stones of 5-10 mm and 40% of basalt stones of 10-16 mm), polyurethane interface agent (Shanghai Zhazha New Material Technology Co., Ltd.) and 187.5 kg of black color paste (Shanghai Yipin manufacturer, model 750), wherein the mass of the one-component polyurethane is 5% of the mass of the asphalt, the appearance of the one-component polyurethane is a brown viscous liquid, the viscosity (25°C) of the one-component polyurethane is 4000 mpa.s, and the density of the one-component polyurethane is 1.15 g / cm 3 The operating temperature of the one-component polyurethane is room temperature, the gel time (25°C) of the one-component polyurethane is 10 minutes, the mass content of non-volatile matter in the one-component polyurethane is 96%, and the surface drying time of the one-component polyurethane is 2 hours; the mass of asphalt is 5% of the mass of aggregate, and the model of asphalt is the same as the model of asphalt of the original pavement of the pothole to be repaired.

[0066] Application Example 1

[0067] A method for repairing a pond using the pond repair material of Example 1, comprising the following steps:

[0068] (1) Before repairing a pond (5m*5m, 10cm deep), close the construction area and prohibit vehicles and pedestrians from passing through;

[0069] (2) Use a handheld cutter to cut the pit into 50cm*50cm regular squares. The cutting thickness should be consistent with the thickness of the original asphalt mixture layer on the road surface. During the cutting process, keep the cutting surface flat and vertical; chisel out the excess asphalt mixture in the pit; thoroughly clean up the debris and accumulated water in the pit to ensure that there is no visible water inside the pit;

[0070] (3) Applying a polyurethane interface agent on the surface of the cleaned pond to obtain a pond coated with the polyurethane interface agent, wherein the amount of the polyurethane interface agent applied is 1.5 kg / m 2 ;

[0071] (4) stirring and mixing the asphalt, the one-component polyurethane, the aggregate and the black color paste to obtain a mixed material;

[0072] (5) 2.5m 3 The mixed material obtained in step (4) is quickly filled into the pit where the polyurethane interface agent is applied in step (3), compacted, and the repaired area is checked for flatness. Uneven areas are trimmed. After compaction is completed, wait for 30 minutes and lift the closure to restore the road to normal traffic. The service life of the repaired road surface under normal use and maintenance conditions is more than 15 years.

[0073] Example 2

[0074] The pond repair material consists of asphalt, 0.5 tons of one-component polyurethane (Shanghai Zhazha New Material Technology Co., Ltd., model JDH-D-06), aggregate (basalt stones with continuous grading, 30% basalt stones of 3-5 mm, 30% basalt stones of 5-10 mm and 40% basalt stones of 10-16 mm), polyurethane interface agent (Shanghai Zhazha New Material Technology Co., Ltd.) and 0.3 tons of black color paste (Shanghai Yipin manufacturer, model 750), wherein the mass of the one-component polyurethane is 5% of the mass of the asphalt, the appearance of the one-component polyurethane is a brown viscous liquid, the viscosity (25°C) of the one-component polyurethane is 5000mpa.s, and the density of the one-component polyurethane is 1.15g / cm 3 The operating temperature of the one-component polyurethane is room temperature, the gel time (25°C) of the one-component polyurethane is 10 minutes, the mass content of non-volatile matter in the one-component polyurethane is 96%, and the surface drying time of the one-component polyurethane is 2 hours; the mass of asphalt is 5% of the mass of aggregate, and the model of asphalt is the same as the model of asphalt of the original pavement of the pothole to be repaired.

[0075] Application Example 2

[0076] A method for repairing a pond using the pond repair material of Example 2, comprising the following steps:

[0077] (1) Before repairing the pond (6m*8m, 12cm deep), close the construction area and prohibit vehicles and pedestrians from passing;

[0078] (2) Use a handheld cutter to cut the pit into 50cm*50cm regular squares. The cutting thickness should be consistent with the thickness of the original asphalt mixture layer on the road surface. During the cutting process, keep the cutting surface flat and vertical; chisel out the excess asphalt mixture in the pit; thoroughly clean up the debris and accumulated water in the pit to ensure that there is no visible water inside the pit;

[0079] (3) Applying a polyurethane interface agent on the surface of the cleaned pond to obtain a pond coated with the polyurethane interface agent, wherein the amount of the polyurethane interface agent applied is 1.5 kg / m 2 ;

[0080] (4) stirring and mixing the asphalt, the one-component polyurethane, the aggregate and the black color paste to obtain a mixed material;

[0081] (5) 4m 3 The mixed material obtained in step (4) is quickly filled into the pit where the polyurethane interface agent is applied in step (3), compacted, and the repaired area is checked for flatness. Uneven areas are trimmed. After compaction is completed, wait for 30 minutes and lift the closure to restore the road to normal traffic. The service life of the repaired road surface under normal use and maintenance conditions is more than 15 years.

[0082] It can be seen from Application Examples 1 and 2 that the repair material provided by the present invention has a short curing time and the repaired road surface has an excellent service life.

[0083] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pond repair material, comprising asphalt, one-component polyurethane, aggregate and polyurethane interface agent; the aggregate is basalt stone with continuous grading.

2. The pond restoration material according to claim 1, characterized in that: The mass of the single-component polyurethane is 3-6% of the mass of the asphalt.

3. The pond restoration material according to claim 1, characterized in that: The viscosity of the one-component polyurethane is 2000-8000 mPa.s.

4. The pond restoration material according to claim 1, characterized in that: The particle sizes of the basalt stones with continuous grading and the mass contents of the various particle sizes are: 10-30% of 3-5mm basalt stones, 20-40% of 5-10mm basalt stones and 40-70% of 10-16mm basalt stones.

5. The pond restoration material according to claim 1 or 4, characterized in that: The mass of the asphalt is 4-6% of the mass of the aggregate.

6. The pond restoration material according to claim 1, characterized in that: The pond repair material also includes black color paste.

7. A method for repairing a pond using the pond repair material according to any one of claims 1 to 6, comprising the following steps: (1) mixing asphalt, one-component polyurethane and aggregate to obtain a mixed material; (2) applying a polyurethane interface agent to the surface of the pond to obtain a pond coated with the polyurethane interface agent; (3) filling the mixture obtained in step (1) into the pit coated with the polyurethane interface agent obtained in step (2), and tamping the mixture to obtain a repaired road surface; There is no chronological order for steps (1) and (2).

8. The pond restoration method according to claim 7, characterized in that: The amount of polyurethane interface agent applied in step (2) is (0.5-1.5) kg / m 2 .

9. The pond restoration method according to claim 8, characterized in that: The amount of polyurethane interface agent applied in step (2) is 1.5 kg / m 2 .

10. The pond restoration method according to claim 7, characterized in that: In the step (2), the pits and ponds are cut, asphalt mixture is removed and cleaned before the polyurethane interface agent is applied.