Epoxy modified asphalt sand-containing fog sealing material and preparation method thereof

Abstract

The present application relates to the technical field of asphalt materials, and specifically discloses an epoxy modified asphalt sand-containing fog sealing material and a preparation method thereof. An epoxy modified asphalt sand-containing fog sealing material, the raw materials of the sand-containing fog sealing material include the following components in parts by weight: 10-20 parts of cement, 90-110 parts of asphalt, 20-30 parts of epoxy resin, 20-30 parts of curing agent, 2-10 parts of penetrant, 1-5 parts of defoamer, 1-5 parts of dispersant, 10-20 parts of surfactant, 20-30 parts of fine sand, 5-10 parts of modified filler, 5-8 parts of steel slag powder, and 5-8 parts of bauxite; the raw materials of the modified filler include phenolic resin, ethanol, and wear-resistant filler. In the present application, the wear-resistant filler is uniformly dispersed in the sand-containing fog sealing material, and the phenolic resin has a large number of cross-linked structures, which can improve the strength of the sand-containing fog sealing material; and the combination of steel slag powder and bauxite is used to improve the wear resistance of the sand-containing fog sealing material.

Description

Technical Field

[0001] The present application relates to the technical field of asphalt materials, and in particular to an epoxy modified asphalt sand-containing fog sealing material and a preparation method thereof. Background Art

[0002] The sand-containing mist seal is a mixture of mist seal materials with modified asphalt or coal tar base materials, clay, and polymer additives as the main components and sand. A special high-pressure sprayer for sand-containing mist seal is used to spray on the asphalt pavement to form a thin layer, which can effectively seal the micro cracks in the pavement, prevent water from seeping in, improve the waterproof performance, and delay the aging of the pavement asphalt, reduce the temperature of the asphalt surface layer, maintain the anti-skid performance of the pavement, prevent the aging of the pavement, and improve the looseness of the road surface. However, the commonly used sand-containing mist seals generally use ordinary asphalt, SBR modified asphalt or SBS modified asphalt. The bonding strength between the binder and the base surface is low, the wear resistance is poor, and the durability is insufficient, which makes it difficult to meet the current preventive maintenance requirements of asphalt pavements on highways in my country. Therefore, it is urgent to develop a sand-containing mist seal material with strong wear resistance and good durability. Summary of the invention

[0003] In order to develop a sand-containing fog sealing material with strong wear resistance and good durability, the present application provides an epoxy-modified asphalt sand-containing fog sealing material and a preparation method thereof.

[0004] In the first aspect, the present application provides an epoxy modified asphalt sand-containing fog sealing material, which adopts the following technical scheme: an epoxy modified asphalt sand-containing fog sealing material, wherein the raw materials of the sand-containing fog sealing material include the following components in parts by weight: 10 to 20 parts of cement, 90 to 110 parts of asphalt, 20 to 30 parts of epoxy resin, 20 to 30 parts of curing agent, 2 to 10 parts of penetrant, 1 to 5 parts of defoaming agent, 1 to 5 parts of dispersant, 10 to 20 parts of surfactant, 20 to 30 parts of fine sand, 5 to 10 parts of modified filler, 5 to 8 parts of steel slag powder, and 5 to 8 parts of bauxite; the raw materials of the modified filler include phenolic resin, ethanol, and wear-resistant filler.

[0005] By adopting the above technical scheme, ethanol is used as a solvent, so that the phenolic resin is evenly loaded on the wear-resistant filler, so that the wear-resistant filler is evenly dispersed in the sand-containing fog sealing material. The phenolic resin has a large number of cross-linked structures, which can improve the strength of the sand-containing fog sealing material; and the combination of steel slag powder and bauxite is used to improve the wear resistance of the sand-containing fog sealing material.

[0006] In a specific embodiment, the wear-resistant filler includes a mixture of silicon dioxide and nano-calcium carbonate.

[0007] By adopting the above technical solution, the hardness of silicon dioxide and nano calcium carbonate is relatively high, and the wear-resistant filler composed of the two is utilized, thereby improving the wear resistance of the sand-containing fog sealing layer material.

[0008] In a specific implementation manner, the weight ratio of the phenolic resin, the ethanol, and the wear-resistant filler is 1:(2.5-3.5):(3-4).

[0009] By adopting the above technical solution, the ratio of phenolic resin, ethanol and wear-resistant filler is further limited, so that the modification effect of the wear-resistant filler is better, and the phenolic resin can better coat the wear-resistant filler.

[0010] In a specific embodiment, the method for preparing the modified filler comprises the following steps:

[0011] Firstly, phenolic resin is added to ethanol, and stirred evenly to dissolve the phenolic resin to obtain a mixed solution; wear-resistant filler is added to the mixed solution, and stirred evenly to obtain a mixed material; the mixed material is vacuum-sucked and dried to obtain a modified filler.

[0012] By adopting the above technical scheme, the phenolic resin is first dissolved in ethanol, then the wear-resistant filler is added, stirred and dispersed, and finally negative pressure suction and drying are performed, so that the phenolic resin is evenly wrapped on the wear-resistant filler to obtain a modified filler with good dispersion performance.

[0013] In a specific embodiment, the dispersant includes a mixture of maleic anhydride and sodium polyacrylate.

[0014] By adopting the above technical solution and utilizing the combination of maleic anhydride and sodium polyacrylate, the components in the sand-containing fog sealing layer material are evenly dispersed, thereby improving the performance of the sand-containing fog sealing layer material.

[0015] In a specific embodiment, the curing agent includes one or more of 4,4′-diaminodiphenylmethane, 4,4′-diaminodiphenyl sulfone, meta-phenylenediamine, ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, hexamethylenediamine, and meta-xylylenediamine.

[0016] In a specific embodiment, the penetrant includes silicone.

[0017] In a specific embodiment, the defoaming agent includes a mixture of polyacrylamide and dimethyl silicone oil.

[0018] By adopting the above technical solution and utilizing the composite defoamer composed of polyacrylamide and dimethyl silicone oil, a better defoaming effect can be achieved and the adverse effects of silicon on the production equipment can be reduced.

[0019] In the second aspect, the present application provides a method for preparing an epoxy modified asphalt sand-containing fog seal material, which adopts the following technical solution:

[0020] A method for preparing an epoxy modified asphalt sand-containing fog sealing material comprises the following steps:

[0021] The asphalt and epoxy resin are heated to 40-60°C respectively, and sheared. During the shearing process, a surfactant is added to the asphalt. After the shearing, the epoxy resin and the modified filler are added to the asphalt, and then the shearing is continued to obtain component A.

[0022] Add defoamer, penetrant, dispersant, cement, fine sand, steel slag powder and bauxite to the curing agent in sequence, stir evenly to obtain component B;

[0023] The components A and B are stirred and mixed evenly to obtain a sand-containing fog sealing material.

[0024] By adopting the above technical scheme, asphalt and epoxy resin are first heated and sheared, and then surfactant, epoxy resin and modified filler are added to the asphalt to obtain component A; defoamer, penetrant, dispersant, cement, fine sand, steel slag powder and bauxite are added to the curing agent in sequence to obtain component B; finally, component A and component B are mixed to obtain a sand-containing fog sealing material with good wear resistance.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. In the present application, ethanol is used as a solvent, so that the phenolic resin is evenly loaded on the wear-resistant filler, so that the wear-resistant filler is evenly dispersed in the sand-containing fog sealing material. The phenolic resin has a large number of cross-linked structures, which can improve the strength of the sand-containing fog sealing material; and the combination of steel slag powder and bauxite is used to improve the wear resistance of the sand-containing fog sealing material;

[0027] 2. In the present application, the phenolic resin is first dissolved in ethanol, then the wear-resistant filler is added, stirred and dispersed, and finally vacuum suction and drying are performed, so that the phenolic resin is evenly wrapped on the wear-resistant filler to obtain a modified filler with good dispersibility;

[0028] 3. The method of the present application is to first heat and shear the asphalt and the epoxy resin, then add the surfactant, epoxy resin and modified filler to the asphalt to obtain component A; add the defoamer, penetrant, dispersant, cement, fine sand, steel slag powder and bauxite to the curing agent in sequence to obtain component B; finally, mix component A and component B to obtain a sand-containing fog sealing material with good wear resistance. DETAILED DESCRIPTION

[0029] The present application is further described in detail below with reference to the embodiments.

[0030] All raw materials in the embodiment can be obtained commercially. The asphalt is emulsified asphalt provided by Shandong Jiaying Chemical Technology Co., Ltd.; the curing agent includes but is not limited to a mixture of one or more of 4,4′-diaminodiphenylmethane, 4,4′-diaminodiphenyl sulfone, m-phenylenediamine, ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, hexamethylenediamine, and m-phenylenediamine, and ethylenediamine is preferred in this application; the penetrant is an organic silicon penetrant; and the fine sand is quartz sand with a mesh size of 40-120 meshes.

[0031] Preparation Example

[0032] Preparation Example 1

[0033] Preparation Example 1 provides a method for preparing a modified filler, comprising the following steps:

[0034] First, add phenolic resin to ethanol, stir evenly to dissolve the phenolic resin and obtain a mixed solution; then add wear-resistant filler to the mixed solution, stir evenly to obtain a mixture, use a negative pressure suction machine to vacuum-suction the mixture, and then dry it at 60°C to obtain a modified filler; wherein the wear-resistant filler is a mixture of silicon dioxide and nano-calcium carbonate, and the weight ratio of silicon dioxide to nano-calcium carbonate is 1:1; the weight ratio of phenolic resin, ethanol and wear-resistant filler is 1:2:2.5.

[0035] Preparation Example 2

[0036] The difference between Preparation Example 2 and Preparation Example 1 is that the weight ratio of phenolic resin, ethanol and wear-resistant filler is 1:2.5:3; the remaining steps are consistent with Preparation Example 1.

[0037] Preparation Example 3

[0038] The difference between Preparation Example 3 and Preparation Example 1 is that the weight ratio of phenolic resin, ethanol and wear-resistant filler is 1:3:3.5; the remaining steps are consistent with Preparation Example 1.

[0039] Preparation Example 4

[0040] The difference between Preparation Example 4 and Preparation Example 1 is that the weight ratio of phenolic resin, ethanol and wear-resistant filler is 1:3.5:4; the remaining steps are consistent with Preparation Example 1.

[0041] Preparation Example 5

[0042] The difference between Preparation Example 5 and Preparation Example 1 is that the weight ratio of phenolic resin, ethanol and wear-resistant filler is 1:4:4.5; the remaining steps are consistent with Preparation Example 1.

[0043] Preparation Example 6

[0044] The difference between Preparation Example 6 and Preparation Example 3 is that the wear-resistant filler is silicon dioxide; the remaining steps are consistent with Preparation Example 3.

[0045] Preparation Example 7

[0046] The difference between Preparation Example 7 and Preparation Example 3 is that the wear-resistant filler is nano-calcium carbonate; the remaining steps are consistent with Preparation Example 3.

[0047] Example

[0048] Example 1

[0049] Example 1 provides a method for preparing an epoxy modified asphalt sand-containing fog seal material, comprising the following steps:

[0050] 90 kg of asphalt and 20 kg of epoxy resin were heated to 50° C. respectively, and sheared at a shear rate of 600 rpm. During the shearing process, 10 kg of surfactant was added to the asphalt. After shearing for 5 min, epoxy resin and 5 kg of the modified filler in Preparation Example 1 were added to the asphalt, and then sheared at a shear rate of 1000 rpm for 30 min to obtain component A; wherein the surfactant was alkylphenol polyoxyethylene ether TX-10;

[0051] To 20 kg of curing agent, 1 kg of defoaming agent, 2 kg of penetrant, 1 kg of dispersant, 10 kg of cement, 20 kg of fine sand, 5 kg of steel slag powder and 5 kg of bauxite were added in sequence, and sheared at a shear rate of 1000 rpm for 10 min to obtain component B; wherein the curing agent is hexamethylenediamine; the defoaming agent is a mixture of polyacrylamide and dimethyl silicone oil, and the weight ratio of polyacrylamide to dimethyl silicone oil is 1:1; the penetrant is organic silicon; the dispersant is a mixture of maleic anhydride and sodium polyacrylate, and the weight ratio of maleic anhydride to sodium polyacrylate is 1:1;

[0052] The components A and B were stirred and mixed evenly, and sheared at a shear rate of 1000 rpm for 1 min to obtain a sand-containing fog sealing material.

[0053] Example 2

[0054] The difference between Example 2 and Example 1 is that the modified filler is the modified filler in Preparation Example 2; the remaining steps are consistent with Example 1.

[0055] Example 3

[0056] The difference between Example 3 and Example 1 is that the modified filler is the modified filler in Preparation Example 3; the remaining steps are consistent with Example 1.

[0057] Example 4

[0058] The difference between Example 4 and Example 1 is that the modified filler is the modified filler in Preparation Example 4; the remaining steps are consistent with Example 1.

[0059] Example 5

[0060] The difference between Example 5 and Example 1 is that the modified filler is the modified filler in Preparation Example 5; the remaining steps are consistent with Example 1.

[0061] Example 6

[0062] The difference between Example 6 and Example 1 is that the modified filler is the modified filler in Preparation Example 6; the remaining steps are consistent with Example 1.

[0063] Example 7

[0064] The difference between Example 7 and Example 1 is that the modified filler is the modified filler in Preparation Example 7; the remaining steps are consistent with Example 1.

[0065] Example 8

[0066] Example 8 provides a method for preparing an epoxy modified asphalt sand-containing fog seal material, comprising the following steps:

[0067] 100 kg of asphalt and 25 kg of epoxy resin were heated to 50° C. respectively, and sheared at a shear rate of 600 rpm. During the shearing process, 15 kg of surfactant was added to the asphalt. After shearing for 5 min, epoxy resin and 8 kg of the modified filler in Preparation Example 1 were added to the asphalt, and then sheared at a shear rate of 1000 rpm for 30 min to obtain component A; wherein the surfactant was alkylphenol polyoxyethylene ether TX-10;

[0068] 3kg of defoamer, 5kg of penetrant, 3kg of dispersant, 15kg of cement, 25kg of fine sand, 6kg of steel slag powder and 6kg of bauxite were added to 25kg of curing agent in sequence, and sheared for 10 minutes at a shear rate of 1000 rpm to obtain component B; wherein the curing agent is hexamethylenediamine; the defoamer is a mixture of polyacrylamide and dimethyl silicone oil, and the weight ratio of polyacrylamide to dimethyl silicone oil is 1:1; the penetrant is organic silicon; the dispersant is a mixture of maleic anhydride and sodium polyacrylate, and the weight ratio of maleic anhydride to sodium polyacrylate is 1:1;

[0069] The components A and B were stirred and mixed evenly, and sheared at a shear rate of 1000 rpm for 1 min to obtain a sand-containing fog sealing material.

[0070] Example 9

[0071] Example 9 provides a method for preparing an epoxy modified asphalt sand-containing fog seal material, comprising the following steps:

[0072] 110 kg of asphalt and 30 kg of epoxy resin were heated to 50° C. respectively, and sheared at a shear rate of 600 rpm. During the shearing process, 20 kg of surfactant was added to the asphalt. After shearing for 5 min, epoxy resin and 10 kg of the modified filler in Preparation Example 3 were added to the asphalt, and then sheared at a shear rate of 1000 rpm for 30 min to obtain component A; wherein the surfactant was alkylphenol polyoxyethylene ether TX-10;

[0073] 5kg of defoamer, 10kg of penetrant, 5kg of dispersant, 20kg of cement, 30kg of fine sand, 8kg of steel slag powder and 8kg of bauxite were added to 30kg of curing agent in sequence, and sheared for 10 minutes at a shear rate of 1000 rpm to obtain component B; wherein the curing agent is hexamethylenediamine; the defoamer is a mixture of polyacrylamide and dimethyl silicone oil, and the weight ratio of polyacrylamide to dimethyl silicone oil is 1:1; the penetrant is organic silicon; the dispersant is a mixture of maleic anhydride and sodium polyacrylate, and the weight ratio of maleic anhydride to sodium polyacrylate is 1:1;

[0074] The components A and B were stirred and mixed evenly, and sheared at a shear rate of 1000 rpm for 1 min to obtain a sand-containing fog sealing material.

[0075] Example 10

[0076] The difference between Example 10 and Example 8 is that the dispersant is maleic anhydride; the remaining steps are consistent with Example 8.

[0077] Embodiment 11

[0078] The difference between Example 11 and Example 8 is that the dispersant is sodium polyacrylate; the remaining steps are consistent with Example 8.

[0079] Comparative Example

[0080] Comparative Example 1

[0081] Comparative Example 1 provides a method for preparing an epoxy modified asphalt sand-containing fog seal material, comprising the following steps:

[0082] 95kg of asphalt and 20kg of epoxy resin were heated to 50°C respectively, and sheared at a shear rate of 600 rpm. During the shearing process, 10kg of surfactant was added to the asphalt. After shearing for 5 minutes, epoxy resin was added to the asphalt, and then sheared at a shear rate of 1000 rpm for 30 minutes to obtain component A; wherein the surfactant was alkylphenol polyoxyethylene ether TX-10; 1kg of defoamer, 2kg of penetrant, 1kg of dispersant, 10kg of cement, and 20kg of fine sand were added to 30kg of curing agent in sequence, and sheared at a shear rate of 1000 rpm for 10 minutes to obtain component B; wherein the curing agent was hexamethylenediamine; the defoamer was a mixture of polyacrylamide and dimethyl silicone oil, and the weight ratio of polyacrylamide to dimethyl silicone oil was 1:1; the penetrant was silicone; the dispersant was a mixture of maleic anhydride and sodium polyacrylate, and the weight ratio of maleic anhydride to sodium polyacrylate was 1:1;

[0083] The components A and B were stirred and mixed evenly, and sheared at a shear rate of 1000 rpm for 1 min to obtain a sand-containing fog sealing material.

[0084] Comparative Example 2

[0085] The difference between Comparative Example 2 and Example 1 is that the modified filler is a mixture of silicon dioxide and nano-calcium carbonate, and the weight ratio of silicon dioxide to nano-calcium carbonate is 1:1; the remaining steps are consistent with Example 1.

[0086] Comparative Example 3

[0087] Comparative Example 3 provides a method for preparing an epoxy modified asphalt sand-containing fog seal material, comprising the following steps:

[0088] 90 kg of asphalt and 20 kg of epoxy resin were heated to 50° C. respectively, and sheared at a shear rate of 600 rpm. During the shearing process, 10 kg of surfactant was added to the asphalt. After shearing for 5 min, epoxy resin and 5 kg of the modified filler in Preparation Example 1 were added to the asphalt, and then sheared at a shear rate of 1000 rpm for 30 min to obtain component A; wherein the surfactant was alkylphenol polyoxyethylene ether TX-10;

[0089] To 30 kg of curing agent, 1 kg of defoamer, 2 kg of penetrant, 1 kg of dispersant, 10 kg of cement and 20 kg of fine sand were added in sequence, and the mixture was sheared at a shear rate of 1000 rpm for 10 min to obtain component B; wherein the curing agent was hexamethylenediamine; the defoamer was a mixture of polyacrylamide and dimethyl silicone oil, and the weight ratio of polyacrylamide to dimethyl silicone oil was 1:1; the penetrant was organic silicon; the dispersant was a mixture of maleic anhydride and sodium polyacrylate, and the weight ratio of maleic anhydride to sodium polyacrylate was 1:1;

[0090] The components A and B were stirred and mixed evenly, and sheared at a shear rate of 1000 rpm for 1 min to obtain a sand-containing fog sealing material.

[0091] Performance test wear resistance: According to JTG E20-2011 "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering", the wear quality is obtained. The lower the wear quality, the better the wear resistance of the sand-containing mist seal material.

[0092] Table 1 Performance test results of sand-fog seal materials

[0093]

[0094]

[0095] In combination with Example 1 and Comparative Examples 1-3, the wear resistance of the sand-containing fog sealing material in Example 1 is the best. It can be seen that when preparing the sand-containing fog sealing material, phenolic resin-modified wear-resistant filler, steel slag powder and bauxite are added to the raw materials. The phenolic resin on the surface of the wear-resistant filler has a large number of cross-linked structures, which can improve the strength of the sand-containing fog sealing material. The wear resistance of the wear-resistant filler itself and the compounding effect of steel slag powder and bauxite are utilized to improve the wear resistance of the sand-containing fog sealing material.

[0096] In combination with Examples 1-5, the sand-containing fog sealing material in Examples 2-4 has good wear resistance. It can be seen that when preparing the modified filler, the ratio of phenolic resin, ethanol, and wear-resistant filler is preferably 1: (2.5-3.5): (3-4), and the modified filler has good dispersion performance, thereby finally obtaining the sand-containing fog sealing material with good wear resistance.

[0097] In combination with Example 3, Example 6 and Example 7, the sand-containing fog sealing material in Example 3 has the best wear resistance. It can be seen that when preparing the modified filler, the wear-resistant filler is preferably a mixture of silicon dioxide and nano-calcium carbonate, and the modified filler has better wear resistance.

[0098] In combination with Example 3, Example 8 and Example 9, the wear resistance of the sand-containing mist sealing material in Example 8 is the best. It can be seen that when preparing the sand-containing mist sealing material, increasing the amount of raw materials used, the wear resistance of the sand-containing mist sealing material shows a trend of first increasing and then decreasing.

[0099] In combination with Example 8, Example 10 and Example 11, the wear resistance of the sand-containing fog sealing material in Example 8 is the best. It can be seen that when preparing the sand-containing fog sealing material, the dispersant is preferably a mixture of maleic anhydride and sodium polyacrylate, so that the components in the sand-containing fog sealing material are evenly dispersed, thereby improving the wear resistance of the prepared sand-containing fog sealing material.

[0100] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An epoxy modified asphalt sand-containing fog sealing material, characterized in that: The raw materials of the sand-containing fog sealing material include the following components in parts by weight: 10-20 parts of cement, 90-110 parts of asphalt, 20-30 parts of epoxy resin, 20-30 parts of curing agent, 2-10 parts of penetrant, 1-5 parts of defoamer, 1-5 parts of dispersant, 10-20 parts of surfactant, 20-30 parts of fine sand, 5-10 parts of modified filler, 5-8 parts of steel slag powder, and 5-8 parts of bauxite; the raw materials of the modified filler include phenolic resin, ethanol, and wear-resistant filler; the wear-resistant filler includes a mixture of silicon dioxide and nano-calcium carbonate; the phenolic resin The weight ratio of the fat, the ethanol and the wear-resistant filler is 1: (2.5-3.5): (3-4); the preparation method of the modified filler comprises the following steps: first adding phenolic resin to ethanol, stirring evenly to dissolve the phenolic resin and obtain a mixed solution; adding the wear-resistant filler to the mixed solution, stirring evenly to obtain a mixture, vacuum-sucking the mixture, and drying to obtain the modified filler; the dispersant comprises a mixture of maleic anhydride and sodium polyacrylate; the penetrant comprises silicone; the defoamer comprises a mixture of polyacrylamide and dimethyl silicone oil.

2. The epoxy modified asphalt sand-containing fog sealing material according to claim 1, characterized in that: The curing agent includes one or more of 4,4′-diaminodiphenylmethane, 4,4′-diaminodiphenyl sulfone, meta-phenylenediamine, ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, hexamethylenediamine, and meta-phenylenediamine.

3. A method for preparing the epoxy modified asphalt sand-containing fog seal material according to any one of claims 1 to 2, characterized in that: The following steps are involved: The asphalt and epoxy resin are heated to 40-60°C respectively, and sheared. During the shearing process, a surfactant is added to the asphalt. After the shearing, the epoxy resin and the modified filler are added to the asphalt, and then the shearing is continued to obtain component A. Add defoamer, penetrant, dispersant, cement, fine sand, steel slag powder and bauxite to the curing agent in sequence, stir evenly to obtain component B; The components A and B are stirred and mixed evenly to obtain a sand-containing fog sealing material.

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