Rapid binder between assembled asphalt pavement plates and preparation method thereof

Abstract

The invention relates to the technical field of road engineering materials, and provides a rapid binder between prefabricated asphalt pavement plates and a preparation method thereof.The rapid binder is formed by mixing a component A and a component B. The component A comprises bisphenol A epoxy resin, glycidyl ester epoxy resin, fly ash and basalt fibers; the component B comprises an amine curing agent and low-molecular polyamide; the preparation method comprises the following steps: step 1, uniformly mixing bisphenol A epoxy resin, glycidyl ester epoxy resin, fly ash and basalt fiber to obtain a component A, and step 2, uniformly mixing an amine curing agent and low-molecular polyamide to obtain a component B; and 3, uniformly mixing the component A and the component B according to a mass ratio of 100: (10-15) to obtain the rapid binder. The quick binder prepared by the invention has the advantages of good economical efficiency, high curing speed, high strength increase speed, high crack resistance and high corrosion resistance, is firmly bonded with assembled asphalt pavement plates, and can quickly repair an asphalt pavement to open traffic.

Description

Technical Field

[0001] The present invention belongs to the technical field of road engineering materials, and particularly relates to a rapid binder between prefabricated asphalt pavement slabs and a preparation method thereof. Background Art

[0002] In recent years, the total mileage of highways in China has been increasing year by year, and the tasks of highway maintenance and repair have become increasingly onerous. Most of the roads in cities are asphalt pavements. At intersections with heavy traffic and vehicle turning areas, the asphalt pavements bear greater pressure and suffer more serious damage, resulting in a shortened service life and often showing damage phenomena such as cracking, rutting, and potholes.

[0003] The existing road maintenance and repair methods mainly involve digging up the damaged road surface, filling it with hot mix asphalt mixture or cold mix asphalt mixture (such as emulsified asphalt mixture), and then rolling it flat. However, this traditional asphalt pavement maintenance and repair method is difficult to achieve rapid and high-quality repair, and often has problems such as poor durability and easy re-damage.

[0004] For the common local maintenance and repair needs of asphalt pavements, prefabricated asphalt road slabs are prepared indoors and installed on-site. They have the advantages of rapid repair, good durability, and high strength. Relevant domestic research shows that the bond strength of the tack coat of asphalt pavement is usually higher than 0.35 MPa. When repairing the road surface at room temperature (25 °C), the general repair time is about 2 hours, and the curing rate of epoxy resin materials will slow down with the decrease of environmental temperature.

[0005] The bond strength between the new and old road surfaces is a key factor in the repair of prefabricated asphalt pavements. During the local maintenance and repair of asphalt pavements, in case of rainy days and other weather conditions, the interface between the new and old road surfaces is likely to be wet. However, the traditional hot mix asphalt mixture or cold mix asphalt mixture (such as emulsified asphalt mixture) has poor bonding performance, which will lead to insufficient durability of asphalt roads, a shortened service life, and frequent damage phenomena such as cracking, rutting, and potholes. In addition, the existing epoxy resin binder has a long curing time and a long repair cycle, and its low-temperature performance is not ideal. Therefore, the current asphalt pavement bonding materials cannot meet the requirements of rapid and efficient repair of prefabricated asphalt pavements.

[0006] In view of this, this invention is specifically proposed. Summary of the Invention

[0007] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art, and provide a rapid binder between prefabricated asphalt pavement slabs and a preparation method thereof. The rapid binder prepared through composite design can efficiently and rapidly achieve the bonding between prefabricated asphalt pavement slabs, and is not affected by rainy days and other wet weather conditions.

[0008] The object of the present invention is solved by the following technical solutions:

[0009] On the one hand, the present invention provides a rapid binder between prefabricated asphalt pavement slabs, which is formed by mixing component A and component B in a mass ratio of 100:(10 - 15);

[0010] Component A, by mass percentage, includes the following components:

[0011] Bisphenol A epoxy resin: 70% - 80%, glycidyl ester epoxy resin: 5% - 10%, fly ash: 5% - 15%, basalt fiber: 5% - 10%, and the sum of the mass percentages of each component in component A is 100%;

[0012] Component B, by mass percentage, includes the following components:

[0013] Amine curing agent: 70% - 80%, low molecular weight polyamide: 20% - 30%, and the sum of the mass percentages of each component in component B is 100%.

[0014] Further, the bisphenol A epoxy resin is a mixture of bisphenol A epoxy resin E44 and bisphenol A epoxy resin E55, and the mass ratio of the two is (65 - 75):(25 - 35).

[0015] Further, the glycidyl ester epoxy resin is glycidyl ester epoxy resin 711.

[0016] Further, the amine curing agent is a mixture of triethylenetetramine and curing agent T31, and the mass ratio of the two is (65 - 75):(25 - 35).

[0017] Further, the low molecular weight polyamide is low molecular weight polyamide 600.

[0018] On the second hand, the present invention provides a preparation method of a rapid binder between prefabricated asphalt pavement slabs, including the following steps:

[0019] Step 1: Mix bisphenol A epoxy resin, glycidyl ester epoxy resin, fly ash and basalt fiber, and stir until uniform to obtain component A;

[0020] Step 2: Mix amine curing agent and low molecular weight polyamide, and stir until uniform to obtain component B;

[0021] Step 3: Mix component A obtained in step 1 and component B obtained in step 2 in a mass ratio of 100:(10 - 15), and stir evenly to obtain a rapid binder.

[0022] Further, the A component obtained in Step 1, the B component obtained in Step 2, and the rapid binder obtained in Step 3 are all mixed using a mixing blender at a stirring speed of 200 - 600 r / min for a stirring time of 5 - 10 min.

[0023] Further, the rapid binder obtained in Step 3 is used for bonding between prefabricated asphalt pavement slabs, and traffic can be opened after curing for 1 - 2 hours.

[0024] Further, in Step 3, the rapid binder needs to be stored in a sealed manner.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The rapid binder for bonding between prefabricated asphalt pavement slabs prepared by the present invention has good fluidity and can efficiently and quickly achieve the bonding of asphalt slabs to the original pavement.

[0027] 2. The rapid binder for bonding between prefabricated asphalt pavement slabs prepared by the present invention can still quickly repair local asphalt pavement in rainy days and other humid weather. The repaired pavement has good service performance, long service life, and is not prone to secondary pavement damage.

[0028] 3. The rapid binder for bonding between prefabricated asphalt pavement slabs prepared by the present invention has good bonding performance and can achieve rapid curing in both dry and humid environments. That is, the bonding layer after the bonding of the asphalt slab to the original pavement can reach complete curing in about 1 - 2 hours, and there is no water vapor on the surface of the bonding layer. The bonding strength of the bonding layer is greater than 0.4 MPa after 1 hour of curing and greater than 1.4 MPa after 2 hours of curing, meeting the construction strength requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings herein are incorporated into the specification and form a part of the specification, and are used together with the specification to explain the principles of the present invention.

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a flowchart of the preparation method of the rapid binder for bonding between prefabricated asphalt pavement slabs of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples consistent with some aspects of the present invention detailed in the appended claims.

[0033] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] The present invention provides a rapid binder between prefabricated asphalt pavement slabs, which is formed by mixing component A and component B in a mass ratio of 100:(10 - 15).

[0035] Component A, by mass percentage, includes the following components:

[0036] Bisphenol A epoxy resin: 70% - 80%, glycidyl ester epoxy resin: 5% - 10%, fly ash: 5% - 15%, basalt fiber: 5% - 10%, and the sum of the mass percentages of the components in component A is 100%.

[0037] Specifically, the bisphenol A epoxy resin is a mixture of bisphenol A epoxy resin E44 and bisphenol A epoxy resin E55, and the mass ratio of the two is (65 - 75):(25 - 35); the glycidyl ester epoxy resin is glycidyl ester epoxy resin 711.

[0038] Component B, by mass percentage, includes the following components:

[0039] Amine curing agent: 70% - 80%, low molecular weight polyamide: 20% - 30%, and the sum of the mass percentages of the components in component B is 100%.

[0040] Specifically, the amine curing agent is a mixture of triethylenetetramine and curing agent T31, and the mass ratio of the two is (65 - 75):(25 - 35); the low molecular weight polyamide is low molecular weight polyamide 600.

[0041] Refer to the attached Figure 1 As shown, the preparation method of the above rapid binder between prefabricated asphalt pavement slabs of the present invention includes the following steps:

[0042] Step 1: At room temperature, bisphenol A epoxy resin, glycidyl ester epoxy resin, fly ash and basalt fiber are mixed and stirred by a mixing blender at a stirring speed of 200 - 600 r / min for 5 - 10 min until they are evenly mixed and there is no fiber agglomeration and fly ash caking phenomenon, obtaining component A;

[0043] Step 2: At room temperature, use a mixing blender to mix the amine curing agent and the low molecular weight polyamide under the condition that the stirring speed is 200 - 600 r / min for 5 - 10 min until evenly mixed to obtain Component B;

[0044] Step 3: At room temperature, use a mixing blender to mix Component A obtained in Step 1 and Component B obtained in Step 2 at a mass ratio of 100:(10 - 15) under the condition that the stirring speed is 200 - 600 r / min for 5 - 10 min to obtain a uniformly mixed fast binder.

[0045] According to the embodiments of the present invention, the fast binder prepared by the present invention needs to be immediately sealed and stored after the uniform mixing operation to prevent the just - prepared fast binder from contacting with moisture in the air and curing.

[0046] According to the embodiments of the present invention, use the fast binder obtained in Step 3 to bond the prefabricated asphalt pavement plates. It can achieve fast curing whether in a dry or humid environment. That is, the bonding layer after the asphalt plates are bonded to the original road surface can reach complete curing in about 1 - 2 hours, and there is no moisture on the surface of the bonding layer. The bonding strength of the bonding layer is greater than 0.4 MPa after 1 hour of curing, and greater than 1.4 MPa after 2 hours of curing, meeting the construction strength requirements, and the traffic can be opened after 1 - 2 hours of curing.

[0047] To verify the beneficial effects brought by the preparation method of the present invention, it is further illustrated through the following embodiments.

[0048] Example 1

[0049] The present invention provides a fast binder between prefabricated asphalt pavement plates, which is composed of Component A and Component B mixed at a mass ratio of 100:10.

[0050] Component A, by mass percentage, includes the following components:

[0051] Bisphenol A epoxy resin: 70%, glycidyl ester epoxy resin: 10%, fly ash: 10%, basalt fiber: 10%, and the sum of the mass percentages of each component in Component A is 100%.

[0052] Component B, by mass percentage, includes the following components:

[0053] Amine curing agent: 70%, low molecular weight polyamide: 30%, and the sum of the mass percentages of each component in Component B is 100%.

[0054] The present embodiment provides a preparation method for the fast binder between prefabricated asphalt pavement plates, including the following steps:

[0055] Step 1: Bisphenol A epoxy resin, glycidyl ester epoxy resin, fly ash and basalt fiber are mixed and stirred by a mixing blender at a stirring speed of 200 r / min for 10 min until evenly mixed to obtain Component A;

[0056] Step 2: An amine curing agent and a low molecular weight polyamide are mixed and stirred by a mixing blender at a stirring speed of 200 r / min for 10 min until evenly mixed to obtain Component B;

[0057] Step 3: Component A obtained in Step 1 and Component B obtained in Step 2 are mixed at a mass ratio of 100:10 and stirred by a mixing blender at a stirring speed of 200 r / min for 10 min to obtain a uniformly mixed fast binder.

[0058] Example 2

[0059] The present invention provides a fast binder between prefabricated asphalt pavement slabs, which is composed of Component A and Component B mixed at a mass ratio of 100:12.

[0060] Component A, by mass percentage, includes the following components:

[0061] Bisphenol A epoxy resin: 75%, glycidyl ester epoxy resin: 5%, fly ash: 15%, basalt fiber: 5%, and the sum of the mass percentages of the components in Component A is 100%.

[0062] Component B, by mass percentage, includes the following components:

[0063] Amine curing agent: 75%, low molecular weight polyamide: 25%, and the sum of the mass percentages of the components in Component B is 100%.

[0064] The present embodiment provides a preparation method for the fast binder between prefabricated asphalt pavement slabs, including the following steps:

[0065] Step 1: Bisphenol A epoxy resin, glycidyl ester epoxy resin, fly ash and basalt fiber are mixed and stirred by a mixing blender at a stirring speed of 400 r / min for 8 min until evenly mixed to obtain Component A;

[0066] Step 2: An amine curing agent and a low molecular weight polyamide are mixed and stirred by a mixing blender at a stirring speed of 400 r / min for 8 min until evenly mixed to obtain Component B;

[0067] Step 3: Component A obtained in Step 1 and Component B obtained in Step 2 are mixed at a mass ratio of 100:12 and stirred by a mixing blender at a stirring speed of 400 r / min for 8 min to obtain a uniformly mixed fast binder.

[0068] Example 3

[0069] The present invention provides a rapid binder between prefabricated asphalt pavement slabs, which is composed of component A and component B mixed in a mass ratio of 100:15.

[0070] Component A, by mass percentage, includes the following components:

[0071] Bisphenol A epoxy resin: 80%, glycidyl ester epoxy resin: 7%, fly ash: 7%, basalt fiber: 6%, and the sum of the mass percentages of each component in component A is 100%.

[0072] Component B, by mass percentage, includes the following components:

[0073] Amine curing agent: 80%, low molecular weight polyamide: 20%, and the sum of the mass percentages of each component in component B is 100%.

[0074] This example provides a preparation method for the rapid binder between prefabricated asphalt pavement slabs, including the following steps:

[0075] Step 1: Mix bisphenol A epoxy resin, glycidyl ester epoxy resin, fly ash, and basalt fiber in a mixing blender at a stirring speed of 600 r / min for 5 minutes until evenly mixed to obtain component A;

[0076] Step 2: Mix the amine curing agent and low molecular weight polyamide in a mixing blender at a stirring speed of 600 r / min for 5 minutes until evenly mixed to obtain component B;

[0077] Step 3: Mix component A obtained in Step 1 and component B obtained in Step 2 in a mixing blender at a mass ratio of 100:15 at a stirring speed of 600 r / min for 5 minutes to obtain a uniformly mixed rapid binder.

[0078] Measure the bonding strengths of the rapid binders prepared in Examples 1 - 3 at room temperature for 1 hour and 2 hours in dry and wet states respectively, as shown in Table 1.

[0079] Table 1 Bonding strength table corresponding to the rapid binders prepared in Examples 1 - 3

[0080]

[0081] As can be seen from Table 1, at room temperature, the construction time can be controlled within 1 h and the operation is simple; the bonding strength of the prefabricated pavement within 1 h is greater than 0.4 MPa, and the bonding strength is greater than 1.5 MPa at 2 h. When the humidity in the indoor test is greater than 90% compared with the dry condition, the bonding strength of the prefabricated pavement decreases slightly at 1 h, but is greater than 0.35 MPa to meet the construction strength requirements. The bonding strength at 2 h decreases to about 1.4 - 1.5 MPa, but still meets the construction strength requirements.

[0082] Moreover, in order to demonstrate that the rapid binder prepared by the present invention has the advantage of a long service life compared with the conventional binder, the rapid binders prepared in Examples 1 - 3 above and the conventional binder were compared by means of an ultraviolet aging test.

[0083] The conventional binder uses ordinary asphalt.

[0084] It was found through the ultraviolet aging test (8 - day QUV accelerated aging tester) that after aging for the same time, the bonding strength of the rapid binder in Example 1 was 0.87 MPa, the bonding strength of the rapid binder in Example 2 was 0.93 MPa, and the bonding strength of the rapid binder in Example 3 was 0.86 MPa, while that of ordinary asphalt was only 0.22 MPa. Therefore, the pavement performance of the local asphalt pavement repaired with the rapid binder prepared by the present invention is good and the service life is long.

[0085] The above - mentioned are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0086] It should be understood that the present invention is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A fast adhesive between assembled asphalt pavement panels, characterized in that: It is prepared by mixing component A and component B in a mass ratio of 100:(10-15); The component A comprises the following components by mass percentage: Bisphenol A type epoxy resin: 70% to 80%, glycidyl ester epoxy resin: 5% to 10%, fly ash: 5% to 15%, basalt fiber: 5% to 10%, and the sum of the mass percentages of the components in component A is 100%; The B component includes the following ingredients by mass percentage: Amine curing agent: 70% to 80%, low molecular weight polyamide: 20% to 30%, and the sum of the mass percentages of the components in component B is 100%.

2. The rapid adhesive between prefabricated asphalt pavement slabs according to claim 1 is characterized in that: The bisphenol A epoxy resin is a mixture of bisphenol A epoxy resin E44 and bisphenol A epoxy resin E55, and the mass ratio of the two is (65-75):(25-35).

3. The rapid adhesive between prefabricated asphalt pavement slabs according to claim 1 is characterized in that: The glycidyl ester epoxy resin is glycidyl ester epoxy resin 711.

4. The rapid adhesive between prefabricated asphalt pavement slabs according to claim 1 is characterized in that: The amine curing agent is a mixture of triethylenetetramine and curing agent T31, and the mass ratio of the two is (65-75): (25-35).

5. The rapid adhesive between prefabricated asphalt pavement slabs according to claim 1 is characterized in that: The low molecular weight polyamide is low molecular weight polyamide 600.

6. A method for preparing a rapid adhesive between assembled asphalt pavement slabs according to claims 1-5, characterized in that: The following steps are involved: Step 1: Mix bisphenol A epoxy resin, glycidyl ester epoxy resin, fly ash and basalt fiber, and stir until uniform to obtain component A; Step 2: Mix the amine curing agent and the low molecular weight polyamide, and stir until uniform to obtain component B; Step 3: Mix the component A obtained in step 1 and the component B obtained in step 2 in a mass ratio of 100:(10-15), and stir evenly to obtain a quick adhesive.

7. The method for preparing the rapid adhesive between assembled asphalt pavement slabs according to claim 6, characterized in that: The component A obtained in step 1, the component B obtained in step 2 and the quick adhesive obtained in step 3 are all mixed in a mixing mixer at a stirring speed of 200 to 600 r / min and a stirring time of 5 to 10 min.

8. The method for preparing the rapid adhesive between assembled asphalt pavement slabs according to claim 6, characterized in that: The quick adhesive obtained in step 3 is used for bonding between assembled asphalt pavement slabs, and traffic is allowed after curing for 1 to 2 hours.

9. The method for preparing the rapid adhesive between assembled asphalt pavement slabs according to claim 6, characterized in that: In step three, the quick adhesive needs to be sealed and stored.

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