High-permeability cold-resistant filling agent for rapid repair of road surface and road surface repairing method

Abstract

The application discloses a high-permeability cold-resistant filling agent for rapid road surface repair and a road surface repair method, and relates to the technical field of road surface repair. The high-permeability cold-resistant filling agent for rapid road surface repair comprises the following components by weight: A component: fine aggregate 45-60 parts, heavy calcium carbonate powder 5-10 parts, hydroxypropyl methyl cellulose 3-8 parts, fly ash 0.5-1 part, cement 1-2 parts, graphene 0.5-1 part, calcium sulfate whisker 0.2-0.5 part, magnesium chloride 0.1-0.2 part, methyl oleate 0.1-0.2 part and magnesium stearate 0.1-0.2 part; and B component: one of an acrylic resin and a phenolic resin. The application further discloses a road surface repair method for rapid road surface repair. The filling agent has the advantages of low-temperature crack resistance, high permeability, good bonding force with an original road surface base, low shrinkage, avoidance of cracks, short-time solidification, rapid repair of a road surface, and quick opening to traffic.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of concrete pavement repair material field, in particular to a kind of high permeability cold-resistant filling agent for rapid repair of pavement and pavement repair method. BACKGROUND

[0002] With the development of road engineering in our country, concrete pavement is widely used, because it has the advantages of durability, economy, impact resistance, frost resistance, etc., the biggest advantage is that it can withstand the extrusion of overload. In long-term use, due to the serious extrusion of heavy vehicles on the concrete pavement, and accompanied by aging, corrosion and other conditions, cracks may appear on the concrete pavement, and even the whole piece may fall off. Many road diseases appear, such as not timely repair will soon develop into incurable disease, and especially for some pit groove rough surface type of disease, there is no ideal solution at present, basically all the conventional ways and means of breaking, after the disease develops to a certain extent, the way of digging and repairing, which is not environmentally friendly, and also leads to a lot of material waste. In the process of digging, the surrounding plates are also damaged, and the long-term closure of the road will bring great inconvenience to road traffic. If it can be handled in time, only the concrete surface needs to be repaired and maintained, which can greatly improve the service life of the concrete pavement and reduce the use cost. In order to not hinder traffic, the concrete pavement repair material needs to be quickly solidified to restore the bending strength and compressive strength of the pavement in a short time. At the same time, whether the pavement repair is successful also depends on whether the repair material and the original pavement matrix have good permeability. This puts forward higher requirements for the repair material. At present, the repair material in the prior art has low indicators. Therefore, it is necessary to further improve the early strength, bonding strength and other comprehensive performance of the repair material. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a high-permeability cold-resistant filling agent for rapid repair of pavement and a pavement repair method.

[0004] The technical solution adopted by the present application to solve its technical problem is,

[0005] The high-permeability cold-resistant filling agent for rapid repair of pavement of the present application comprises the following raw materials by weight: A component: fine aggregate 45-60 parts, heavy calcium carbonate powder 5-10 parts, hydroxypropyl methyl cellulose 3-8 parts, fly ash 0.5-1 part, cement 1-2 parts, graphene 0.5-1 part, calcium sulfate whisker 0.2-0.5 part, magnesium chloride 0.1-0.2 part, methyl oleate 0.1-0.2 part, and magnesium stearate 0.1-0.2 part.

[0006] B component: one of acrylic resin and phenolic resin. Since phenolic resin is solid at room temperature and needs to be heated and melted for use, acrylic resin is preferred.

[0007] The mass ratio of the A component and the B component is 1:0.1-0.2.

[0008] The fine aggregate is quartz sand and / or river sand.

[0009] The heavy calcium carbonate powder is added to increase the strength.

[0010] Further, the preparation method of the high-permeability cold-resistant filling agent for rapid road repair comprises the following steps: preparing a modified additive A component: mixing graphene, calcium sulfate whiskers, magnesium chloride, methyl oleate and magnesium stearate, and performing ball milling modification to obtain a modified additive; and mixing fine aggregate, heavy calcium carbonate powder, hydroxypropyl methyl cellulose, fly ash, cement and the modified additive uniformly to obtain the high-permeability cold-resistant filling agent for rapid road repair.

[0011] Further, in the ball milling modification, the rotating speed of the ball mill is 10r / min-20r / min, and the ball milling time is 10-30 minutes.

[0012] The magnesium stearate is added in the raw materials to prepare the modified additive, promote the ball milling modification, and improve the mixing property in the modification process, so that the modified additive is uniform and stable.

[0013] Further, the diameter of the calcium sulfate whisker is 8-12 microns, the length is 80-150 microns, and the length-diameter ratio is 6-20.

[0014] The methyl oleate is added to facilitate the cooperation of the mixtures and improve the comprehensive performance of the repair material, such as the early strength and the bonding strength.

[0015] The high-permeability cold-resistant filling agent for rapid road repair has a mass ratio of 1:0.1-0.2 between the A component and the B component when used for road repair, which is more suitable for rapid curing and repair and improves the road strength.

[0016] The modified additive is added to make the slurry structure more perfect and ensure the road strength. The fly ash is an active admixture, and the addition of the fly ash in an appropriate amount can effectively reduce the self-shrinkage of the concrete. The addition of the calcium sulfate whisker and the graphene can improve the skeleton strength of the concrete, the cement hydration product can be combined with the calcium sulfate whisker to enhance the strength of the space skeleton structure, avoid cracks, and the graphene can continuously fill the pores and micropores generated in the production process, so that the strength of the concrete can also be improved. The heavy calcium carbonate powder is added to increase the strength. The hydroxypropyl methyl cellulose improves the viscosity and the strength. The B component adopts resin, especially acrylic resin, which can greatly improve the strength of the final filling agent and shorten the curing time.

[0017] The present application has the following advantages: the present application obtains a high-permeability cold-resistant filling agent for rapid repair of road surface through combination, proportioning and synergistic effect of various raw materials, and the obtained filling agent has low-temperature crack resistance, high permeability, good bonding force with the original road surface substrate, low shrinkage and avoids cracks. The repair material of the present application can be cured in a short time, and rapid repair of road surface can be realized to open the road as soon as possible.

[0018] The high-permeability cold-resistant filling agent for rapid repair of road surface of the present application has the advantages of high strength, salt and alkali resistance, strong adhesion, oil resistance, waterproof aging resistance, high wear resistance and the like when used for road repair. The filling agent can quickly repair diseases such as peeling, sanding, exposed stones, exposed bones, freeze-thaw, honeycomb, pits, crushing, broken boards, pitted surface, cracks and the like of the cement road surface, and achieve the effects of no hollowing, no cracking, no crushing and freeze-thaw resistance. The filling agent can achieve rapid 1-hour traffic opening, and realizes all-weather repair and super-long durable use in outdoor environment.

[0019] The cured road surface rapid repair material of the present application has very strong compressive strength, and the compressive strength can be as high as 28.8Mpa after 2 hours of detection by the national building material center, and the compressive strength continuously increases in the later period and can be as high as 107Mpa.

[0020] Bonding performance: the bonding performance of the road surface rapid repair material of the present application is improved due to the addition of the modified additive, the repaired surface and the original road surface are reacted to form a unified whole, and the bonding strength is detected by the national building material center, and the bonding strength of the repaired surface and the original road surface can be as high as (3.5)Mpa after 2 hours of construction, the bonding capacity is basically not affected by the thickness, and 2mm ultra-thin repair can be realized, and the repaired surface will not fall off or break under the external force such as stretching, rolling and pushing.

[0021] Folding strength: the folding strength detected by the national building material center can be as high as 11.4Mpa after 2 hours, and the folding strength of C45 cement after 28 days is 6.5Mpa; compared with the C45 cement, the repair agent of the present application has better reinforcing and supporting effect on the disease part, and the compressive strength requirement of the non-special load road can be met when the repair thickness is 3mm, and the repaired surface will not fall off or break under the high-speed and high-pressure driving conditions. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 FIG. 1 is a road surface live image after repair using the filling agent of example 1 in application example 1;

[0023] Figure 2 、 Figure 3 、 Figure 4 FIG. 1 is a road surface live image before and after repair using the filling agent of example 1 in application example 1. DETAILED DESCRIPTION

[0024] The application will be further described in detail below in connection with specific embodiments.

[0025] Example 1

[0026] The high-permeability cold-resistant filling agent for rapid road repair in the present embodiment comprises the following raw materials by weight: Component A: fine aggregate 45 parts, heavy calcium carbonate powder 6 parts, hydroxypropyl methylcellulose 3 parts, fly ash 1 part, cement 2 parts, graphene 1 part, calcium sulfate whisker 0.5 part, magnesium chloride 0.2 part, methyl oleate 0.1 part, and magnesium stearate 0.2 part.

[0027] Component B: acrylic resin.

[0028] The mass ratio of Component A to Component B is 1:0.1.

[0029] The fine aggregate is quartz sand.

[0030] The preparation method of the high-permeability cold-resistant filling agent for rapid road repair comprises the following steps: first, preparing Component A of the modified additive: mixing graphene, calcium sulfate whisker, magnesium chloride, methyl oleate, and magnesium stearate, and ball-milling modification to obtain the modified additive; and then, mixing the fine aggregate, heavy calcium carbonate powder, hydroxypropyl methylcellulose, fly ash, cement, and the modified additive uniformly to obtain the high-permeability cold-resistant filling agent for rapid road repair.

[0031] In the ball-milling modification, the rotating speed of the ball mill is 15 r / min, and the ball-milling time is 20 minutes.

[0032] The magnesium stearate is added to the raw materials to prepare the modified additive, promote the ball-milling modification, and improve the mixing property in the modification process, so that the modified additive is uniform and stable. The magnesium chloride is added to the raw materials to improve the permeability of the filling agent. The addition of the modified additive can improve the cold resistance and curing performance of the filling agent.

[0033] The calcium sulfate whisker has a diameter of 8-12 microns, a length of 80-150 microns, and an aspect ratio of 6-20.

[0034] The addition of methyl oleate facilitates the cooperation of the mixtures and improves the comprehensive performance of the repair material, such as the early strength and bonding strength.

[0035] The high-permeability cold-resistant filling agent for rapid road repair has a mass ratio of Component A to Component B of 1:0.1 when used for road repair, which is more suitable for rapid curing and repair and improves the strength of the road.

[0036] The filling agent of Example 1 is detected after curing, and the detection results are shown in Table 1.

[0037] Table 1

[0038]

[0039]

[0040] Example 2

[0041] The high-permeability cold-resistant filling agent for rapid road repair of the present embodiment comprises the following raw materials by weight: Component A: fine aggregate 60 parts, heavy calcium carbonate powder 10 parts, hydroxypropyl methyl cellulose 8 parts, fly ash 0.8 parts, cement 1.5 parts, graphene 0.8 parts, calcium sulfate whisker 0.3 parts, magnesium chloride 0.15 parts, methyl oleate 0.15 parts, and magnesium stearate 0.15 parts.

[0042] Component B: acrylic resin.

[0043] The mass ratio of Component A to Component B is 1:0.2.

[0044] The fine aggregate is river sand.

[0045] The method for preparing the high-permeability cold-resistant filling agent for rapid road repair comprises the following steps: first, preparing Component A of the modified additive: mixing graphene, calcium sulfate whisker, magnesium chloride, methyl oleate, and magnesium stearate, and ball-milling modification to obtain the modified additive. After the preparation of the modified additive, the fine aggregate, heavy calcium carbonate powder, hydroxypropyl methyl cellulose, fly ash, cement, and the modified additive are mixed uniformly to obtain the filling agent.

[0046] In the ball-milling modification, the rotation speed of the ball mill is 20 r / min, and the ball-milling time is 10 minutes.

[0047] The magnesium stearate is added to the raw materials to prepare the modified additive, promote the ball-milling modification, and improve the mixing property in the modification process, so that the modified additive is uniform and stable. The addition of magnesium chloride improves the permeability of the filling agent. The addition of the modified additive can improve the cold resistance and curing performance of the filling agent.

[0048] The calcium sulfate whisker has a diameter of 8-12 microns, a length of 80-150 microns, and an aspect ratio of 6-20.

[0049] The addition of methyl oleate facilitates the cooperation of the mixtures and improves the comprehensive performance of the repair material, such as early strength and bonding strength.

[0050] The high-permeability cold-resistant filling agent for rapid road repair has a mass ratio of Component A to Component B of 1:0.2 when used for road repair, which is more suitable for rapid curing and repair and improves the strength of the road.

[0051] The filling agent of Example 2 is detected after curing, and the detection results are shown in Table 2:

[0052] Table 2

[0053]

[0054]

[0055] Example 3

[0056] The high-permeability cold-resistant filling agent for rapid repair of road surface of the present embodiment comprises the following raw materials by weight: Component A: fine aggregate 50 parts, heavy calcium carbonate powder 8 parts, hydroxypropyl methyl cellulose 5 parts, fly ash 0.6 parts, cement 2 parts, graphene 0.6 parts, calcium sulfate whisker 0.3 parts, magnesium chloride 0.1 part, methyl oleate 0.1 part, and magnesium stearate 0.2 part.

[0057] Component B: acrylic resin.

[0058] The mass ratio of Component A to Component B is 1:0.15.

[0059] The fine aggregate is a mixture of quartz sand and river sand in a mass ratio of 1:5.

[0060] The preparation method of the high-permeability cold-resistant filling agent for rapid repair of road surface comprises the following steps: first, preparing Component A of the modified additive: mixing graphene, calcium sulfate whisker, magnesium chloride, methyl oleate, and magnesium stearate, and ball-milling modification to obtain the modified additive; and then, mixing the fine aggregate, heavy calcium carbonate powder, hydroxypropyl methyl cellulose, fly ash, cement, and the modified additive uniformly to obtain the filling agent.

[0061] In the ball-milling modification, the rotation speed of the ball mill is 12 r / min, and the ball-milling time is 20 minutes.

[0062] The magnesium stearate is added to the raw materials to prepare the modified additive, promote the ball-milling modification, and improve the mixing property in the modification process, so that the modified additive is uniform and stable. The magnesium chloride is added to improve the permeability of the filling agent. The addition of the modified additive can improve the cold resistance and curing performance of the filling agent.

[0063] The calcium sulfate whisker has a diameter of 8-12 microns, a length of 80-150 microns, and an aspect ratio of 6-20.

[0064] The addition of methyl oleate facilitates the cooperation of the mixtures and improves the comprehensive performance of the repair material, such as the early strength and bonding strength.

[0065] The high-permeability cold-resistant filling agent for rapid repair of road surface has a mass ratio of Component A to Component B of 1:0.15 when used for road repair, which is more suitable for rapid curing and repair and improves the strength of the road surface.

[0066] The filling agent of Example 3 is detected after curing, and the detection results are shown in Table 3:

[0067] Table 3

[0068]

[0069]

[0070] The present invention incorporates a modifying additive to improve the slurry structure and ensure pavement strength. Fly ash is an active admixture, and adding an appropriate amount can effectively reduce concrete's autogenous shrinkage. The addition of calcium sulfate whiskers and graphene can enhance the concrete's skeletal strength. Cement hydration products can combine with the calcium sulfate whiskers to strengthen the spatial skeleton and prevent cracks. Graphene can continuously fill the pores and micropores generated during the production process, thereby increasing concrete strength.

[0071] The present invention has the following beneficial effects: Through the combination, proportioning, and synergistic effects of various raw materials, a highly permeable, cold-resistant filler is produced for rapid road repair. The resulting filler exhibits low-temperature crack resistance, high permeability, good adhesion to the existing road surface substrate, and low shrinkage, thus preventing cracks. The repair material cures quickly, enabling rapid road repair and expedited traffic opening.

[0072] The high-permeability, cold-resistant filler for rapid pavement repair presented in this invention exhibits high strength, salt- and alkali-resistance, strong adhesion, oil resistance, water resistance, anti-aging properties, and high wear resistance. It can quickly repair cement pavement defects such as peeling, sanding, exposed stones, exposed bones, freeze-thaw damage, honeycombing, potholes, broken slabs, pitting, and cracks, preventing hollowing, cracking, or breakage, and is freeze-thaw-resistant. It can achieve rapid traffic opening in as little as one hour. Furthermore, it enables all-weather repairs and offers exceptionally long-lasting outdoor use.

[0073] The rapid road repair material of the present invention has very strong compressive strength after curing. According to the test of the National Building Materials Center, the compressive strength of the material can be as high as 28.8 MPa after 2 hours. The strength continues to increase in the later period, and the maximum compressive strength can reach 107 MPa.

[0074] Adhesion performance: The adhesion performance of the pavement rapid repair material of the present invention itself is excellent. Due to the addition of modifying additives, the repair surface and the original pavement react to form a unified whole. The bonding strength has been tested by the National Building Materials Center. The bonding strength 2 hours after construction is as high as (3.5) Mpa compared to the positive tensile bonding strength of C45 concrete. It can be bonded to various diseased parts. The bonding ability is basically not affected by the thickness. It can achieve 2MM ultra-thin repairs and will not fall off or break under external forces such as stretching, rolling, and pushing.

[0075] The anti-bending strength is 11.4 Mpa detected by the national building material center for 2 hours, and the anti-bending strength of C45 cement is 6.5 Mpa for 28 days; compared with the prior art, the repairing agent of the application has better reinforcing and supporting effect on the disease part, and the compressive requirement of the non-special load road can be reached by 3mm repairing thickness, and the cracking and falling off do not occur under the high-speed and high-pressure driving state.

[0076] Comparative Example 1

[0077] The difference between the present comparative example and example 1 is that the modified auxiliary agent is not prepared, and the raw materials graphene, calcium sulfate whisker, magnesium chloride, methyl oleate and magnesium stearate are simply mixed. The other operations and parameters are the same as those of example 1.

[0078] Comparative Example 2

[0079] The difference between the present comparative example and example 1 is that the modified auxiliary agent is not prepared, and the raw materials graphene, calcium sulfate whisker, magnesium chloride, methyl oleate and magnesium stearate are simply mixed. The other operations and parameters are the same as those of example 1.

[0080] Comparative Example 3

[0081] The difference between the present comparative example and example 1 is that the modified auxiliary agent is not prepared, and the raw materials graphene, calcium sulfate whisker, magnesium chloride, methyl oleate and magnesium stearate are simply mixed. The other operations and parameters are the same as those of example 1.

[0082] Comparative Example 4

[0083] The difference between the present comparative example and example 1 is that the modified auxiliary agent is not prepared, and the raw materials graphene, calcium sulfate whisker, magnesium chloride, methyl oleate and magnesium stearate are simply mixed. The other operations and parameters are the same as those of example 1.

[0084] Comparative Example 5

[0085] The difference between the present comparative example and example 1 is that the modified auxiliary agent is not prepared, and the raw materials graphene, calcium sulfate whisker, magnesium chloride, methyl oleate and magnesium stearate are simply mixed. The other operations and parameters are the same as those of example 1.

[0086] Application Example 1

[0087] The repairing agents of examples 1-3 and comparative examples 1-5 are respectively used to repair the road cracks.

[0088] Repairing of road cracks:

[0089] 1. Cutting along the two sides of the crack to form a vertical surface with a depth greater than 4 cm on both sides of the crack, and the width of the expanded crack is 6-8 cm.

[0090] 2. All loose and loose debris are removed until the firm layer, and the drilled crack is compacted.

[0091] 3. The prepared repairing agent is poured into the drilled crack until no more infiltration, and is smoothed and roughened according to the actual situation on site.

[0092] The strength of the road repairing materials of Examples 1-3 and Comparative Examples 1-5 was detected, and the results are shown in Table 4. The road surface repaired by the patching agent of Example 1 is shown in Figure 1 and Figure 2 .

[0093] Table 4

[0094]

[0095] Application Example 2

[0096] The road pit was repaired by the patching agent of Example 1.

[0097] Repair of the road pit:

[0098] 1. First, the cause of the road damage was confirmed, and the root cause of the damage was found. Then, according to the actual situation on site, the damaged pit was broken along the four boundaries of the pit, and a vertical surface with a depth of more than 5 cm was formed around the pit.

[0099] 2. The pit was thoroughly cleaned, and all loose and loose parts were removed until the firm layer; the bottom layer, the middle layer, and the surface layer were sequentially prepared with the patching agent concrete mortar, poured into the pit to be repaired, and continuously vibrated to compact, and then the anti-skid surface layer was sequentially applied.

[0100] After repair, the strength of the road repairing material was detected, which was almost the same as the result of the patching agent of Example 1 in Application Example 1.

[0101] Application Example 3

[0102] The road pit was repaired by the patching agent of Example 1.

[0103] Repair of the road pit:

[0104] 1. The road to be repaired was cleaned, and the loose layer on the surface was removed until the firm layer.

[0105] 2. The patching mortar was divided into bottom layer material: quickly penetrated into the old concrete deep place, surface layer material: as a stable layer and anti-skid layer, and sequentially repaired, depending on the actual situation of the repair.

[0106] After repair, the strength of the road repairing material was detected, which was almost the same as the result of the patching agent of Example 1 in Application Example 1.

Claims

1. High-penetration cold-resistant filler for rapid road repair, characterized by: The invention comprises the following raw materials in parts by weight: component A: 45-60 parts of fine aggregate, 5-10 parts of heavy calcium carbonate powder, 3-8 parts of hydroxypropyl methylcellulose, 0.5-1 part of fly ash, 1-2 parts of cement, 0.5-1 part of graphene, 0.2-0.5 part of calcium sulfate whisker, 0.1-0.2 part of magnesium chloride, 0.1-0.2 part of methyl oleate, and 0.1-0.2 part of magnesium stearate; Component B: one of acrylic resin and phenolic resin; The mass ratio of component A to component B is 1:0.1-0.

2.

2. The high-permeability cold-resistant filler for rapid road repair according to claim 1, characterized in that: The fine aggregate is quartz sand and / or river sand.

3. The high-permeability cold-resistant filler for rapid road repair according to claim 1 or 2, characterized in that: The method for preparing the high-permeability cold-resistant filler for rapid road repair comprises the following steps: first preparing a modification auxiliary agent: mixing graphene, calcium sulfate whiskers, magnesium chloride, methyl oleate, and magnesium stearate, and subjecting the mixture to ball milling modification to obtain the modification auxiliary agent.

4. The high-permeability cold-resistant filler for rapid road repair according to claim 3, characterized in that: After the modification additive is prepared, fine aggregate, heavy calcium carbonate powder, hydroxypropyl methylcellulose, fly ash, cement and the modification additive are evenly mixed to obtain component A.

5. The high-permeability cold-resistant filler for rapid road repair according to claim 3, characterized in that: During the ball milling modification, the rotation speed of the ball mill is 10 r / min to 20 r / min, and the ball milling time is 10 to 30 minutes.

6. The high-permeability cold-resistant filler for rapid road repair according to claim 1 or 2, characterized in that: The diameter of the calcium sulfate whiskers is 8-12 microns, the length is 80-150 microns, and the aspect ratio is 6-20.

7. A road surface repair method, comprising using the high-permeability cold-resistant filler for rapid road surface repair according to any one of claims 1 to 6 for road surface repair, wherein the mass ratio of component A to component B is 1:0.1-0.2.

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