Green and environment-friendly recycled reclaimed rubber powder based on decorative building materials and preparation method of green and environment-friendly recycled reclaimed rubber powder

Abstract

The invention belongs to the technical field of building materials, and relates to green and environment-friendly recycled reclaimed rubber powder based on decorative building materials and a preparation method of the green and environment-friendly recycled reclaimed rubber powder. The powder is prepared from the following components in parts by weight: 20 to 40 parts of white cement, 1 to 4 parts of metakaolin, 0.1 to 1 part of white carbon black, 0.1 to 1 part of wollastonite, 1 to 5 parts of shell powder, 10 to 40 parts of quartz powder, 0.1 to 0.8 part of water reducing agent, 0.05 to 0.3 part of defoaming agent and 5 to 15 parts of regenerated rubber powder. The regenerated rubber powder is soaked in a silane coupling agent in advance. The environment-friendly white cement-based decorative composite material disclosed by the invention can promote the utilization of rubber renewable resources, and the modified rubber powder is utilized to fill pores of a hardened concrete material, so that the compactness of the concrete material is improved, the cracking phenomenon of concrete is inhibited, the probability of saltpetering is reduced, and the service life of the concrete is prolonged. The durability and the service life of the material are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of building materials, and relates to a recycled rubber powder based on green and environmentally friendly recycling in decorative building materials and a preparation method thereof. Background Art

[0002] With the continuous development of my country's economy and the deepening of the internationalization of urban planning and architectural design, the use of white cement as a color decorative material has received extensive attention and research. However, there are many problems in the application of white silicate cement as a decorative material, such as high brittleness, easy cracking, alkali efflorescence, poor water resistance, high water absorption, and problems with durability and weather resistance. A lot of research has been done on adding some polymer materials to concrete materials to improve the strain capacity and early shrinkage of concrete.

[0003] my country is a country with a large application of rubber. At least 5 million tons of rubber are not used every year, causing various environmental pollution and waste of resources. The main ways to deal with waste rubber are to produce recycled rubber and reuse it, burn it for energy, and produce rubber powder. The production of recycled rubber has a large amount of toxic and harmful sulfide emissions, and the performance of recycled rubber is also greatly reduced compared to before; burning it as energy will release smoke and carbon monoxide, polluting the atmospheric environment; and rubber powder can be used in plastics as a plasticizer and modifier.

[0004] The purpose of the present invention is to provide a new direction for the application of recycled rubber powder, which is of great significance in the development of waste rubber resource utilization and sustainable development. Summary of the invention

[0005] The technical solution of the present invention aims to provide a process method for preparing a white cement-based decorative composite material which is green and environmentally friendly, makes full and rational use of waste resources, improves the brittle cracking of concrete materials, and can arbitrarily adjust the color of the white base material. The method has the characteristics of simple process and low cost.

[0006] The technical solution of the present invention is as follows: A recycled rubber powder based on green and environmentally friendly recycling in decorative building materials, the powder comprises the following components by weight: 20-40 parts of white cement, 1-4 parts of metakaolin, 0.1-1 parts of white carbon black, 0.1-1 parts of wollastonite, 1-5 parts of shell powder, 10-40 parts of quartz powder, 0.1-0.8 parts of water reducing agent, 0.05-0.3 parts of defoaming agent, and 5-15 parts of recycled rubber powder; The recycled rubber powder is pre-soaked with a silane coupling agent.

[0007] Furthermore, the strength of the white cement is 52.5 and the Heinz whiteness is 87-92 degrees.

[0008] Further, the particle size of the metakaolin is 30 - 120 mesh.

[0009] Further, the particle size of the wollastonite is 30 - 150 mesh.

[0010] Further, the shell powder is a wet - grinding recycled material; the particle size of the quartz powder is 80 - 200 mesh.

[0011] Further, the water - reducing agent is selected from one of melamine, naphthalene - based, and polycarboxylate - based.

[0012] Further, the defoaming agent is selected from one of polyethers, silicone - ether composites, and mineral oils.

[0013] Further, the rubber powder is recycled rubber, and the particle size is 10 - 30 mesh.

[0014] Further, the silane coupling agent is propyltriethoxysilane.

[0015] A preparation method of recycled rubber powder based on green environmental protection recycling in decorative building materials: Add the recycled rubber powder and the silane coupling agent into a three - necked flask equipped with a condenser, a stirrer, and a thermometer, stir at 65 °C for 1 hour to make the recycled rubber powder and the silane coupling agent evenly mixed, and then dry it for standby in the natural environment; According to the component weights, put all the materials into a dry powder mixer and stir for 10 - 20 minutes, and finally pack and seal them into finished products.

[0016] An environment - friendly white cement - based decorative composite material of the present invention can promote the utilization of rubber renewable resources, and use the modified rubber powder to fill the pores after the hardening of concrete materials, improve the compactness of concrete materials, inhibit the cracking of concrete, thereby reducing the probability of efflorescence and improving the durability and service life of the materials. Specific Embodiments

[0017] The present invention will be further described below in conjunction with specific embodiments. Example 1

[0018] An environment - friendly white cement - based decorative composite material, its composition and mass content are: 350 g of white Portland cement of grade 52.5, 50 g of metakaolin, 2 g of wollastonite, 20 g of shell powder, 450 g of quartz powder, 4.5 g of water - reducing agent, 2.5 g of defoaming agent, 80 g of recycled rubber powder, and the rubber powder is pre - soaked and treated with a silane coupling agent.

[0019] The whiteness of the white portland cement is 87 - 92 degrees; the particle size of the metakaolin is 30 - 120 mesh; the particle size of the wollastonite is 30 - 150 mesh; the shell powder is a wet - milled recycled material; the particle size of the quartz powder is 80 - 200 mesh; the water - reducing agent is a polycarboxylate water - reducing agent; the defoaming agent is a polyether defoaming agent; the particle size of the rubber powder is 10 - 30 mesh; the silane coupling agent is propyltriethoxysilane.

[0020] The preparation method is as follows: Add the rubber powder and the silane coupling agent into a three - necked flask equipped with a condenser, a stirrer and a thermometer, stir at 65 °C for 1 hour to make the rubber powder and the silane coupling agent evenly mixed, and then dry it in the natural environment for standby. According to the component weights, put all the materials into a dry powder mixer and stir for 10 - 20 minutes, and finally pack and seal them into finished products. Example 2

[0021] An environmentally friendly white cement - based decorative composite material, its composition and mass content are: 300 g of white portland cement of grade 52.5, 30 g of metakaolin, 2 g of wollastonite, 15 g of shell powder, 400 g of quartz powder, 4 g of water - reducing agent, 2 g of defoaming agent, 60 g of recycled rubber powder, and the rubber powder is pre - soaked and treated with a silane coupling agent.

[0022] The equipment used and the preparation process are the same as in Example 1 Example 3

[0023] An environmentally friendly high - whiteness white cement - based decorative composite material, its composition and mass content are: 400 g of white portland cement of grade 52.5, 40 g of metakaolin, 3 g of wollastonite, 15 g of shell powder, 500 g of quartz powder, 4.5 g of water - reducing agent, 2.5 g of defoaming agent, 40 g of recycled rubber powder, and the rubber powder is pre - soaked and treated with a silane coupling agent.

[0024] The equipment used and the preparation process are the same as in Example 1 Example 4

[0025] An environmentally friendly high - whiteness white cement - based decorative composite material, its composition and mass content are: 450 g of white portland cement of grade 52.5, 50 g of metakaolin, 3 g of wollastonite, 35 g of shell powder, 550 g of quartz powder, 5 g of water - reducing agent, 2.5 g of defoaming agent, 60 g of recycled rubber powder, and the rubber powder is pre - soaked and treated with a silane coupling agent.

[0026] The equipment used and the preparation process are the same as in Example 1 Add 20% - 50% of water to the white cement - based premix prepared according to the above examples, and the performance of the obtained white cement - based composite material is shown in Table 1:

[0027] As can be seen from the above results, some of the materials used in the present invention are waste recycling materials that are beneficial to environmental protection. When these materials are made into an environmentally friendly high-whiteness white cement-based decorative composite material, the performance of this decorative material in suppressing efflorescence is improved, the water absorption performance of the material is as low as, and the performance of the material can completely turn several kinds of recycled materials into treasures. Moreover, the performance of the material meets the requirements of the construction industry and has broad market application prospects.

[0028] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention rather than limitations. It should be pointed out that those of ordinary skill in the art should understand that without departing from the technical principles and scope of the present invention, several improvements and modifications can be made to the technical solution of the present invention, and these improvements and modifications should all be covered within the scope of the claims of the present invention.

Claims

1. A regenerated rubber powder based on green environmental protection recycling in decorative building materials, characterized in that: The powder includes the following components by weight: 20-40 parts of white cement, 1-4 parts of metakaolin, 0.1-1 part of white carbon black, 0.1-1 part of wollastonite, 1-5 parts of shell powder, 10-40 parts of quartz powder, 0.1-0.8 part of water reducing agent, 0.05-0.3 part of defoaming agent, and 5-15 parts of recycled rubber powder; The recycled rubber powder is pre-soaked and treated with a silane coupling agent.

2. The recycled rubber powder based on the green environmental protection recycling in decorative building materials is characterized in that: The white cement has a strength of grade 52.5 and a Hunter whiteness of 87-92 degrees.

3. The recycled rubber powder based on the green environmental protection recycling in decorative building materials is characterized in that: The particle size of the metakaolin is 30-120 mesh.

4. The recycled rubber powder based on the green environmental protection recycling in decorative building materials is characterized in that: The particle size of the wollastonite is 30-150 mesh.

5. The recycled rubber powder based on the green environmental protection recycling in decorative building materials is characterized in that: The shell powder is a wet grinding method recycled material; the particle size of the quartz powder is 80-200 mesh.

6. The recycled rubber powder based on the green environmental protection recycling in decorative building materials is characterized in that: The water reducing agent is selected from one of melamine, naphthalene series, and polycarboxylic acid series.

7. The recycled rubber powder based on the green environmental protection recycling in decorative building materials is characterized in that: The defoaming agent is selected from one of polyethers, silicone-ether composites, and mineral oils.

8. The recycled rubber powder based on the green environmental protection recycling in decorative building materials is characterized in that: The rubber powder is recycled rubber with a particle size of 10-30 mesh.

9. The recycled rubber powder based on green environmental protection recycling in decorative building materials is characterized in that: The silane coupling agent is propyltriethoxysilane.

10. A preparation method of the recycled rubber powder for green environmental protection recycling in decorative building materials as described in claims 1-9, characterized in that: The recycled rubber powder and the silane coupling agent are added together into a three-necked flask equipped with a condenser, a stirrer, and a thermometer, stirred at 65 °C for 1 hour to make the recycled rubber powder and the silane coupling agent evenly mixed, and then dried for standby in a natural environment; According to the component weights, all the materials are put into a dry powder mixer and stirred for 10-20 minutes, and finally packaged into finished products.

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