High-performance resin concrete as well as preparation method and application thereof

Abstract

The invention provides high-performance resin concrete. The high-performance resin concrete is prepared from a cementing material, an efficient early strength agent, cement, aggregate and a cementation material. A cementing material used in the material has the characteristics of super-strong bonding force, strong shearing force, aging resistance, good medium resistance, strong impact resistance, normal-temperature curing, small shrinkage in a hardening process, no flowing in construction, short time for reaching strength, no volatile solvent, no toxicity, convenience in construction, capability of being constructed in a relatively wide temperature range, no precipitation and the like; the bending resistance and the tensile strength can be improved. And the cement can fill gaps of the cementing material, reduce the shrinkage of the cementing material and increase the compactness of the colloid. After the high-efficiency early strength agent is added, shrinkage of the mixture can be controlled to generate cracks, so that the effect of increasing compactness and strength is achieved. The aggregate can greatly improve the compressive strength and breaking strength of the material. And the mechanical property indexes such as bending resistance and tensile strength of the material can be changed by the infiltration material.

Description

Technical Field

[0001] The present application relates to the technical field of building materials, and in particular to a high-performance resin concrete and a preparation method and application thereof. Background Art

[0002] Targeted solutions to the chronic problems encountered in existing maintenance projects over the years, such as long-term water accumulation on the bridge deck, rapid road damage caused by local base diseases (commonly known as road potholes), poor bonding effect of surface construction at the steel box girder location, easy damage to the expansion joint post-cast strip, how to efficiently deal with uneven settlement locations during traffic conditions, and the use of reinforced concrete in the bridge deck non-stop snapshot monitoring system that affects signal transmission.

[0003] Traditional pavement renovation materials have shortcomings such as the need for maintenance, insufficient toughness, poor waterproof performance, low adhesion to steel structures and concrete, and low construction efficiency. How to achieve fast construction, high toughness, good waterproof effect, no shrinkage after drying, no need for maintenance, and a new material with micro-expansion to offset shrinkage through scientific material ratio is a technical problem that needs to be solved in this field. Summary of the invention

[0004] In view of this, the present application provides a method to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0005] The technical solution of the present application is achieved as follows: first, a high-performance resin concrete is provided, comprising components: a binder, a high-efficiency early strength agent, cement, aggregate and a bonding material; wherein the binder is a structural adhesive that does not contain volatile solvents, with a tensile strength greater than or equal to 30 MPa, a flexural strength greater than or equal to 45 MPa, a compressive strength greater than or equal to 65 MPa, a steel-steel tensile shear strength greater than or equal to 15 MPa, a steel-steel tensile tensile strength greater than or equal to 15 MPa, and a steel-C45 concrete positive tensile bonding strength greater than or equal to 2.5 MPa.

[0006] Furthermore, the binder is modified epoxy resin.

[0007] Furthermore, the aggregate includes: river sand, guami stone and quartz sand.

[0008] Furthermore, the fineness modulus of river sand is 1.6-2.2.

[0009] Furthermore, the compounding material includes mineral powder and at least one of steel fiber and polyester fiber.

[0010] Furthermore, the high-efficiency early strength agent is a mixture of organic and inorganic silicates in a weight ratio of 2:1.

[0011] Furthermore, in units of kilograms per cubic meter, it includes: binder 110-160, cement 300-560, high-efficiency early strength agent 45-70, river sand 590-740, guami stone 1000-1300, quartz sand 400-750, mineral powder 10-30, steel fiber or polyester fiber 10-30.

[0012] The present application also provides a method for preparing the above-mentioned high-performance resin concrete, which can be used for on-site construction, comprising the following steps performed in sequence:

[0013] S1. Materials are weighed in proportion;

[0014] S2. The binder and the high-efficiency early strength agent are added and mixed in sequence to obtain a binder mixture;

[0015] S3. Premix cement and river sand evenly;

[0016] S4. Add the binder mixture to the mixture obtained in S3 and stir repeatedly;

[0017] S5. Add melon stone and quartz sand to the mixture obtained in S4 and stir again;

[0018] S6. Finally, steel fiber or polyester fiber is added to the mixture obtained in S5 and stirring is repeated;

[0019] S7. After mixing evenly, use a vibrating table to compact it.

[0020] The present application also provides an application of the above-mentioned high-performance resin concrete for repairing road surfaces.

[0021] Furthermore, the method for repairing the road surface specifically comprises the following steps:

[0022] S1. Clean the damaged area until it is flat, straight, and free of dust and debris;

[0023] S2. For pits with a depth of less than or equal to 15 cm, the high-performance resin concrete is directly applied. For pits with a depth greater than 15 cm, steel fibers or polyester fibers are added and then applied. The addition of steel fibers or polyester fibers can greatly improve the bending resistance of the material.

[0024] The embodiment of the present application adopts the above technical solution, which has the following advantages:

[0025] A high-performance resin concrete solution is provided, which is mainly composed of a binder, a high-efficiency early strength agent, cement, aggregate (river sand, melon stone, quartz sand) and a bonding material (mineral powder, steel fiber or polyfiber, etc.). The binder used in the material has super strong bonding force, strong shear force, anti-aging, good medium resistance (acid, alkali, water) performance, strong impact resistance, room temperature curing, small shrinkage during hardening, no flow during construction, short time to reach strength, does not contain volatile solvents, is non-toxic and convenient to construct, can be constructed in a wide temperature range, has no precipitation, etc., and can increase the bending and tensile strength. Cement can fill the gaps in the binder, reduce the shrinkage of the binder, and increase the density of the colloid. After adding the high-efficiency early strength agent, the shrinkage of the mixture can be controlled to produce cracks to achieve the effect of increasing density and strength. Aggregates can greatly improve the compressive strength and flexural strength of the material. The bonding material can change the mechanical properties of the material such as bending and tensile strength.

[0026] The high-performance resin concrete of the present application has the following effects: (1) Rapid opening to traffic: opening to traffic within 1-3 hours at room temperature; (2) High bonding strength: high bonding strength to steel surface, and bonding strength to concrete greater than the strength of conventional concrete body; (3) High strength and high elastic modulus: flexural elastic modulus is much greater than that of pavement concrete, and has good impact resistance; (4) Simple construction: on-site mixing is convenient and quick, and no large-scale rolling machinery is required; (5) Durability: repaired and formed, physical properties are maintained without damage for 1 year or more.

[0027] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the following detailed description. DETAILED DESCRIPTION

[0028] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the description is considered to be exemplary rather than restrictive in nature.

[0029] The embodiments of the present application are described in detail below.

[0030] Example 1 provides a high-performance resin concrete, which is composed of the following materials

[0031]

[0032]

[0033] Among them, the binder is a modified epoxy resin structural adhesive that does not contain volatile solvents, with a tensile strength greater than or equal to 30Mpa, a flexural strength greater than or equal to 45Mpa, a compressive strength greater than or equal to 65Mpa, a steel-steel tensile shear strength greater than or equal to 15Mpa, a steel-steel tensile tensile strength greater than or equal to 15Mpa, and a steel-C45 concrete tensile bonding strength greater than or equal to 2.5Mpa.

[0034] The preparation method of Example 1 is:

[0035] S1. Materials are weighed in proportion;

[0036] S2. The binder and the high-efficiency early strength agent are added and mixed in sequence to obtain a binder mixture;

[0037] S3. Premix cement and river sand evenly;

[0038] S4. Add the binder mixture to the mixture obtained in S3 and stir repeatedly;

[0039] S5. Add melon stone and quartz sand to the mixture obtained in S4 and stir again;

[0040] S6. Finally, steel fiber or polyester fiber is added to the mixture obtained in S5 and stirring is repeated;

[0041] S7. After mixing evenly, use a vibrating table to compact it.

[0042] Test Example 1 provides a comparison between samples 1-4 obtained in Example 1 and existing repair materials.

[0043]

[0044]

[0045] It can be seen that quick-drying cement and UHPC ultra-high performance concrete require water spraying or vacuum steam curing during construction. If the curing is not timely, it is easy to crack. High-performance resin concrete (tentative name) does not require curing. In terms of compressive strength, the high-performance resin concrete provided in this application can reach the traffic conditions of a first-class highway in 3 hours, and the compressive strength is close to 2 times that of quick-drying cement, and at the same time exceeds the C50 compressive strength requirements of the bridge expansion joint post-casting strip. The 7-day compressive strength is close to the 28-day compressive strength value of structural UHPC (ultra-high performance concrete), and at the same time exceeds the 28-day compressive strength of quick-drying cement by more than 1.5 times. In terms of flexural strength, the 3-hour flexural strength of the high-performance resin concrete provided by you can reach 52% of the standard of the UHPC 28-day ultimate flexural strength (structural type), and the 1-day flexural strength can exceed the UHPC 28-day ultimate flexural strength (structural type) standard. The 7-day flexural strength exceeds the UHPC 28-day flexural strength value by 37.1%, which is more than 2 times the 28-day flexural strength value of quick-drying cement. Apart from its ability to quickly open traffic, the mechanical properties of asphalt cold patch materials are far inferior to the above three materials.

[0046] In addition, quick-drying cement and UHPC shrink greatly, have low bonding strength with steel structures, and are prone to cracking at the interface, pits, gnawing and other defects. Through the above comparison, this high-performance resin concrete has the advantages of high strength, no need for maintenance, high bonding strength with steel structures or concrete interfaces, and good durability, and is more suitable for roads with large traffic flows and requiring rapid opening of traffic.

[0047] Example 2 provides an application of high-performance resin concrete.

[0048] The sample 1 in Example 1 is used to repair the damaged position of a bridge pavement, comprising the following steps:

[0049] S1. Clean the damaged area until it is flat, straight, and free of dust and debris;

[0050] S2. For pits with a depth of less than or equal to 15 cm, directly apply sample 1. For pits with a depth of more than 15 cm, add steel fiber or polyester fiber and then apply the high-performance resin concrete. Adding steel fiber or polyester fiber can greatly improve the bending resistance of the material.

[0051] The preparation process in Example 1 is performed by curing on site.

[0052] In particular, when used to repair asphalt or concrete pavement, by weight, the ratio of binder to aggregate in high-performance resin concrete is 1:2-1:4, the ratio of steel fiber or polyester fiber is 2‰-6‰, the ratio of stone to sand in aggregate is 4:1-2:1 (where the stone particle size is 8-10mm; the sand is fine sand), the ratio of cement is 5%-10%, and the ratio of high-efficiency early strength agent to cement is 1:10. The crushed stone and sand used should be kept clean and dry.

[0053] Preferably, after the sample 1 is mixed and prepared, it should be spread within 1 hour and vibrated and compacted with a flat vibrator.

[0054] After the above repairs, the road can be opened to traffic 1-3 hours after the completion of the construction and no maintenance is required.

[0055] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A high performance resin concrete, characterized in that: Including components: It is composed of binder, high-efficiency early strength agent, cement, aggregate and infiltration material; Among them, the binder is a structural adhesive that does not contain volatile solvents, with a tensile strength greater than or equal to 30Mpa, a flexural strength greater than or equal to 45Mpa, a compressive strength greater than or equal to 65Mpa, a steel-steel tensile shear strength greater than or equal to 15Mpa, a steel-steel tensile tensile strength greater than or equal to 15Mpa, and a steel-C45 concrete tensile bonding strength greater than or equal to 2.5Mpa.

2. The high performance resin concrete according to claim 1, characterized in that: The binder is modified epoxy resin.

3. The high performance resin concrete according to claim 1, characterized in that: The aggregates include river sand, guami stone and quartz sand.

4. The high performance resin concrete according to claim 3, characterized in that: The fineness modulus of the river sand is 1.6-2.

2.

5. The high performance resin concrete according to claim 1, characterized in that: The compounding material includes mineral powder and at least one of steel fiber and polyester fiber.

6. The high performance resin concrete according to claim 1, characterized in that: The high-efficiency early strength agent is a mixture of organic and inorganic silicates in a weight ratio of 2:

1.

7. The high performance resin concrete according to claim 1, characterized in that: Calculated in kilograms per cubic meter, it includes: binder 110-160, cement 300-560, high-efficiency early strength agent 45-70, river sand 590-740, guami stone 1000-1300, quartz sand 400-750, mineral powder 10-30, steel fiber or polyester fiber 10-30.

8. The method for preparing high performance resin concrete according to claims 1 to 7, characterized in that: The method includes the following steps: S1. Materials are weighed in proportion; S2. The binder and the high-efficiency early strength agent are added and mixed in sequence to obtain a binder mixture; S3. Premix cement and river sand evenly; S4. Add the binder mixture to the mixture obtained in S3 and stir repeatedly; S5. Add melon stone and quartz sand to the mixture obtained in S4 and stir again; S6. Finally, steel fiber or polyester fiber is added to the mixture obtained in S5 and stirring is repeated; S7. After mixing evenly, use a vibrating table to compact it.

9. The use of the high performance resin concrete according to claims 1 to 7, characterized in that: Used for repairing road surfaces, expansion joint post-cast strips, steel box girder pavements, and thin slab concrete pavements.

10. The use according to claim 9, characterized in that: The method for repairing the road surface specifically comprises the following steps: S1. Clean the damaged area until it is flat, straight, and free of dust and debris; S2. For pits with a depth of less than or equal to 15 cm, the high-performance resin concrete is directly applied. For pits with a depth of more than 15 cm, the high-performance resin concrete is applied after steel fibers or polyester fibers are added.

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