Joint repairing material for repairing fabricated building cracks

Abstract

The invention discloses a crack repairing material for repairing prefabricated building cracks, which belongs to the technical field of building materials and comprises the following steps: a) preparing raw materials; b) premixing; c) melting and mixing; d) adding the residual rubber powder; e) cooling and curing; and f) cutting and packaging. Polymer base materials (such as polyurethane, epoxy resin, acrylic resin and the like), functional auxiliaries (such as plasticizers, anti-aging agents and the like) and rubber powder (such as butadiene styrene rubber powder, natural rubber powder, synthetic rubber powder and the like) are meticulously selected, so that the prepared crack repairing material has excellent cohesiveness, weather resistance, elasticity and wear resistance. And nano-scale reinforcing materials (such as nano silicon dioxide, nano calcium carbonate, nano aluminum oxide and the like) are added, so that the mechanical property and durability of the joint filling material are further improved, the joint filling material can bear larger stress and deformation, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of building materials, and in particular relates to a seam-filling material for repairing cracks in assembled buildings. Background Art

[0002] With the rapid development of the construction industry, prefabricated buildings, as a new type of construction method, have been widely used due to their advantages such as fast construction speed, low cost, easy standardization and modularization. However, during the long-term use of prefabricated buildings, cracks often occur due to various factors (such as temperature changes, humidity changes, foundation settlement, etc.). These cracks not only affect the aesthetics of the building, but more importantly, they may reduce the structural safety and service life of the building.

[0003] Traditional seam-filling materials and technologies have many shortcomings when dealing with cracks in prefabricated buildings. For example, some traditional seam-filling materials have poor adhesion and are difficult to form a good bond with the materials of prefabricated buildings, resulting in poor seam-filling effects; other materials have good adhesion but poor weather resistance, and are prone to aging and cracking after long-term use, and cannot provide a lasting repair effect. In addition, traditional seam-filling technologies are often complex to construct, requiring professional construction personnel and complex construction equipment, which increases construction costs and difficulty. Summary of the invention

[0004] The purpose of the present invention is to provide a seam-filling material for repairing cracks in prefabricated buildings in view of the existing problems.

[0005] The present invention is achieved through the following technical solutions: A seam-filling material for repairing cracks in prefabricated buildings comprises the following steps: a) Prepare raw materials: select appropriate polymer base materials, functional additives and rubber powder as raw materials; b) Premixing: the polymer base material (accounting for 50%-60% of the total weight), the functional additive (accounting for 5%-15% of the total weight) and part of the rubber powder (accounting for 10%-30% of the total weight) are mixed uniformly according to a predetermined ratio to form a premixed material; c) Melt mixing: heating the premixed material to a molten state, and stirring it in the molten state at a stirring speed of 50-150 rpm for 10-30 minutes to fully blend the components; d) Add the remaining rubber powder: After the mixture is melted and mixed uniformly, slowly add the remaining rubber powder (10%-30% of the total weight) at a rate of 5-20 kg per minute, and continue stirring at a stirring speed of 50-150 rpm for 10-20 minutes until a uniform molten mixture is formed; e) Cooling and solidifying: pouring the molten mixture into a mold or a cooling device, cooling it naturally at room temperature or forced air cooling it to 20°C-30°C, and solidifying it to form a seam filling material; f) Cutting and packaging: The cooled and solidified sealing materials are cut into the required shapes and sizes as needed, and quality inspection is carried out to ensure that there are no defects before packaging with appropriate packaging materials.

[0006] Furthermore, the polymer base material is selected from at least one of polyurethane, epoxy resin or acrylic resin. These polymer base materials have excellent adhesion, weather resistance and mechanical strength, and are suitable for repairing cracks in prefabricated buildings.

[0007] Furthermore, the functional additives include plasticizers and anti-aging agents. The plasticizers can increase the flexibility and plasticity of the seam-filling material, making it easier to construct; and the anti-aging agents can improve the weather resistance and service life of the seam-filling material.

[0008] Furthermore, the rubber powder includes at least one of styrene-butadiene rubber powder, natural rubber powder or synthetic rubber powder. These rubber powders can provide good elasticity and wear resistance, and enhance the overall performance of the seam-filling material.

[0009] Furthermore, in the preparation step c), the heating and melting temperature is controlled within the range of 120° C. to 180° C. This temperature range can ensure that the polymer base material is fully melted while avoiding component decomposition or performance degradation caused by high temperature.

[0010] Furthermore, in the preparation step b), nano-scale reinforcing materials such as nano-silicon dioxide, nano-calcium carbonate or nano-aluminum oxide are added, accounting for 1%-5% of the total weight. These nano-scale reinforcing materials can significantly improve the mechanical properties and durability of the seam-filling material without affecting its construction performance.

[0011] Furthermore, in the preparation step c), an ultrasonic assisted melt mixing technique is used to treat the molten mixture with ultrasound at a frequency of 10-50 kilohertz per second for 5-15 minutes. Ultrasonic treatment can break the interface barriers between components, promote molecular mixing and reaction, and thus improve the uniformity and performance of the seam repair material.

[0012] Compared with the prior art, the present invention has the following advantages: 1. By carefully selecting polymer base materials (such as polyurethane, epoxy resin, acrylic resin, etc.), functional additives (such as plasticizers, anti-aging agents, etc.) and rubber powder (such as styrene-butadiene rubber powder, natural rubber powder, synthetic rubber powder, etc.), the seam-filling material prepared by the present invention has excellent adhesion, weather resistance, elasticity and wear resistance. The addition of nano-level reinforcing materials (such as nano-silicon dioxide, nano-calcium carbonate, nano-aluminum oxide, etc.) further improves the mechanical properties and durability of the seam-filling material, enabling it to withstand greater stress and deformation and extend its service life.

[0013] 2. Ultrasonic assisted melting and mixing technology is used to treat the molten mixture with ultrasound at a frequency of 10-50 kilohertz per second, effectively breaking the interface barriers between components and promoting molecular-level mixing and reaction. This technology not only improves the uniformity and performance of the seam-filling material, but also shortens the preparation time, reduces energy consumption, and improves production efficiency.

[0014] 3. The present invention precisely controls each step in the preparation process, including the ratio of raw materials, the temperature of heating and melting, the stirring speed and time, etc., to ensure the stability and consistency of the quality and performance of the seam-filling material. Precise preparation process control also makes the seam-filling material have better construction performance, is easy to apply, fill and solidify, and improves construction efficiency and quality. DETAILED DESCRIPTION Example

[0015] A seam-filling material for repairing cracks in prefabricated buildings comprises the following steps: a) Prepare raw materials: select appropriate polymer base materials, functional additives and rubber powder as raw materials; b) Premixing: the polymer base material (accounting for 60% of the total weight), the functional additive (accounting for 15% of the total weight) and part of the rubber powder (accounting for 20% of the total weight) are mixed uniformly according to a predetermined ratio to form a premixed material; c) Melt mixing: heating the premixed material to a molten state, and stirring the premixed material at a stirring speed of 100 rpm for 30 minutes in the molten state to fully blend the components; d) Add the remaining rubber powder: After the mixture is melted and mixed uniformly, slowly add the remaining rubber powder (accounting for 20% of the total weight) at a speed of 10 kg per minute, and continue stirring at a stirring speed of 100 rpm for 10-20 minutes until a uniform molten mixture is formed; e) Cooling and solidifying: pouring the molten mixture into a mold or a cooling device, cooling it naturally at room temperature or forced air cooling it to 30° C., and solidifying it to form a seam filling material; f) Cutting and packaging: The cooled and solidified sealing materials are cut into the required shapes and sizes as needed, and quality inspection is carried out to ensure that there are no defects before packaging with appropriate packaging materials.

[0016] Furthermore, the functional additives include plasticizers and anti-aging agents. The plasticizers can increase the flexibility and plasticity of the seam-filling material, making it easier to construct; and the anti-aging agents can improve the weather resistance and service life of the seam-filling material.

[0017] Furthermore, the rubber powder includes at least one of styrene-butadiene rubber powder, natural rubber powder or synthetic rubber powder. These rubber powders can provide good elasticity and wear resistance, and enhance the overall performance of the seam-filling material.

[0018] Furthermore, in the preparation step c), the temperature of heating and melting is controlled within the range of 180° C. This temperature range can ensure that the polymer base material is fully melted while avoiding component decomposition or performance degradation caused by high temperature.

[0019] Furthermore, in the preparation step b), nano-scale reinforcing materials such as nano-silicon dioxide, nano-calcium carbonate or nano-aluminum oxide are added, accounting for 5% of the total weight. These nano-scale reinforcing materials can significantly improve the mechanical properties and durability of the seam-filling material without affecting its construction performance.

[0020] In the preparation step c), ultrasonic assisted melt mixing technology is used to treat the molten mixture with ultrasound at a frequency of 30 kilohertz per second for 15 minutes. Ultrasonic treatment can break the interface barriers between components and promote molecular mixing and reaction, thereby improving the uniformity and performance of the seam filling material.

[0021] The performance indicators of the embodiment of the seam-filling material for repairing cracks in prefabricated buildings are as follows:

[0022] The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification, should be within the protection scope of the present invention.

Claims

1. A seam-filling material for repairing cracks in prefabricated buildings, characterized in that: The specific preparation steps are: a) Prepare raw materials: select appropriate polymer base materials, functional additives and rubber powder as raw materials; b) Premixing: the polymer base material (accounting for 50%-60% of the total weight), the functional additive (accounting for 5%-15% of the total weight) and part of the rubber powder (accounting for 10%-30% of the total weight) are mixed uniformly according to a predetermined ratio to form a premixed material; c) Melt mixing: heating the premixed material to a molten state, and stirring it in the molten state at a stirring speed of 50-150 rpm for 10-30 minutes to fully blend the components; d) Add the remaining rubber powder: After the mixture is melted and mixed uniformly, slowly add the remaining rubber powder (10%-30% of the total weight) at a rate of 5-20 kg per minute, and continue stirring at a stirring speed of 50-150 rpm for 10-20 minutes until a uniform molten mixture is formed; e) Cooling and solidifying: pouring the molten mixture into a mold or a cooling device, cooling it naturally at room temperature or forced air cooling it to 20°C-30°C, and solidifying it to form a seam filling material; f) Cutting and packaging: The cooled and solidified sealing materials are cut into the required shapes and sizes as needed, and quality inspection is carried out to ensure that there are no defects before packaging with appropriate packaging materials.

2. A seam-filling material for repairing cracks in prefabricated buildings according to claim 1, characterized in that: The polymer base material is selected from at least one of polyurethane, epoxy resin or acrylic resin.

3. A seam-filling material for repairing cracks in prefabricated buildings according to claim 1, characterized in that: The functional additives include plasticizers and anti-aging agents.

4. A seam-filling material for repairing cracks in prefabricated buildings according to claim 1, characterized in that: The rubber powder includes at least one of styrene-butadiene rubber powder, natural rubber powder or synthetic rubber powder.

5. A seam-filling material for repairing cracks in prefabricated buildings according to claim 1, characterized in that: In the preparation step c), the temperature of heating and melting is controlled in the range of 120°C-180°C.

6. A seam-filling material for repairing cracks in prefabricated buildings according to claim 1, characterized in that: In the preparation step b), nano-scale reinforcing materials such as nano-silicon dioxide, nano-calcium carbonate or nano-aluminum oxide are also added, accounting for 1%-5% of the total weight.

7. A seam-filling material for repairing cracks in prefabricated buildings according to claim 1, characterized in that: In the preparation step c), an ultrasonic-assisted melt-mixing technique is used to treat the molten mixture with ultrasound at a frequency of 10-50 kHz per second for 5-15 minutes.

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