A granite waste water-permeable roadbed material and a preparation method thereof

Abstract

The present application relates to the technical field of building materials, and particularly relates to a gang stone waste residue water-permeable roadbed material and a preparation method thereof, which comprises the following components in parts by weight: gang stone waste residue 1-1.2 parts, cementing material 0.2-0.6 parts, rubber particle powder 0.2-0.6 parts, fly ash 0.1-0.5 parts, silica ash 0-0.06 parts, aggregate 3.5-5 parts, modified foaming agent 0.01-0.04 parts, nano calcium carbonate 0.01-0.03 parts, and water 0.4-0.6 parts; the modified foaming agent is prepared from the following raw materials in parts by weight: H2O 210-20 parts, NaHCO3 10-15 parts, aluminum powder 15-20 parts, sodium dodecyl sulfate 10-20 parts, E607L 10-15 parts, and potassium laurate 20-25 parts. The present application combines a plurality of foaming agent procedures and an open communication hole structure construction method, so that the roadbed material has an open hole communication structure with uniform size, forms a through drainage cavity, has a water-permeable function, can make rainwater penetrate into the ground, improves the road surface rapid drainage capacity and the road surface driving safety in rainy days, and improves the water storage capacity of a sponge city.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and in particular to a permeable roadbed material made of engineered stone waste and its preparation method. Background Technology

[0002] Ordinary concrete pavements are either non-permeable or have very low permeability. Traditional urban pavements are impermeable structures, allowing rainwater to drain through the surface, but their drainage capacity is limited. During heavy rain or storms, rainwater easily accumulates on the road surface, concentrating in large quantities on vehicle and bicycle lanes, leading to widespread flooding. This reduces urban air humidity, accelerates the formation of the urban heat island effect, and affects the ground ecosystem. It disrupts the normal water cycle, breaks the balance of the urban ecosystem, and hinders the normal growth of vegetation.

[0003] Currently, due to the diverse types, large volume, and impurities of construction waste residue, traditional treatment methods mainly involve landfilling or incineration. However, these methods lead to resource waste and environmental pollution. Furthermore, the current recycling rate of construction waste is low; most ore waste residue is treated as waste and directly disposed of, failing to fully realize its potential as a renewable resource. Using this ore waste residue in roadbed construction would not only solve the problems associated with it but also enable the reuse of this solid waste, improving the utilization rate of solid waste resources in my country.

[0004] The invention patent with application number CN202311503378.9 provides a solid waste polymer lightweight soil suitable for large-volume casting, its preparation method, and its application method. The solid waste polymer lightweight soil suitable for large-volume casting comprises the following components by weight: 30-60 parts fly ash, 10-20 parts slag powder, 10-20 parts steel slag powder, 5-20 parts caustic soda waste residue, 5-15 parts soda ash waste residue, and 0.02-0.2 parts foaming agent. The main mineral phase components of the soda ash waste residue are calcium carbonate, calcium sulfate, and calcium chloride, and the main mineral phase components of the caustic soda waste residue are rock salt, mirabilite, and caustic soda. The sum of the weight parts of the fly ash, slag powder, steel slag powder, caustic soda waste residue, and soda ash waste residue is 100 parts. While this method offers a new approach to solid waste recycling, it suffers from drawbacks. Because it utilizes a single foaming technology, most of the micropores are closed, resulting in poor water permeability and a tendency for widespread water accumulation on roads. Furthermore, it hinders heat dissipation, potentially leading to prolonged periods of high temperatures. Therefore, it is essential to develop a concrete foam structure with uniformly sized, interconnected open pores. Summary of the Invention

[0005] The purpose of this invention is to provide a permeable roadbed material made of engineered stone waste and its preparation method, in order to address the problems mentioned above.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A permeable roadbed material made from engineered stone waste comprises the following components by weight: 1-1.2 parts engineered stone waste, 0.2-0.6 parts cementitious material, 0.2-0.6 parts rubber granules, 0.1-0.5 parts fly ash, 0-0.06 parts silica fume, 3.5-5 parts aggregate, 0.01-0.04 parts modified foaming agent, 0.01-0.03 parts nano-calcium carbonate, and 0.4-0.6 parts water;

[0008] The improved foaming agent is prepared from the following raw materials in parts by weight: 10-20 parts H2O2, 10-15 parts NaHCO3, 15-20 parts aluminum powder, 10-20 parts sodium dodecyl sulfate, 10-15 parts E607L, 20-25 parts potassium laurate, and 10-20 parts water.

[0009] Furthermore, the diameter of the quartz waste residue is 5mm to 10mm.

[0010] Furthermore, over 60% of the quartz waste has a diameter of 6mm to 8mm.

[0011] Furthermore, the gelling material is a mixture of sodium silicate and water-based epoxy resin in a mass ratio of 4:5.

[0012] Furthermore, the modulus of the sodium silicate is 20-30, and the modulus of the waterborne epoxy resin is 50-80.

[0013] Furthermore, the aggregate is gravel, wherein 55% to 65% of the aggregate has a particle size of 10 to 15 mm, and 35% to 45% of the aggregate has a particle size of 5 to 8 mm.

[0014] Furthermore, the modified foaming agent is prepared by the following method:

[0015] (1) Mix H2O2, NaHCO3, aluminum powder and 5-10 parts of water in a weight ratio to obtain a mixture;

[0016] (2) Heat the mixture obtained in step (1) at 45-55°C and stir it at a speed of 300-500 rpm for 10-20 min.

[0017] (3) Add sodium dodecyl sulfate, E607L, potassium laurate and 5-10 parts of water during the stirring process, stir for 10-30 minutes, and cool the mixture to room temperature to obtain the modified foaming agent.

[0018] Furthermore, the preparation method of the permeable roadbed material made of engineered stone waste includes the following steps:

[0019] (1) Mix and stir the slag, cementitious materials, rubber granules, fly ash, silica fume, nano calcium carbonate, aggregates and water to obtain a clean slurry;

[0020] (2) Mix the modified foaming agent with the slurry obtained in step (1), stir evenly to obtain a foam slurry, and pour the foam slurry into a mold or pour it on site for construction.

[0021] (3) During construction, air is injected into the poured slurry through pre-embedded air pipes to form an open and interconnected hole structure, thus obtaining the permeable roadbed material.

[0022] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0023] 1. This invention combines multiple foaming agent process foaming technologies with a construction method using an open and interconnected pore structure. The resulting roadbed material has a uniform size and an open and interconnected pore structure, forming a continuous drainage channel with water permeability. This allows rainwater to seep into the ground, improving the road surface's rapid drainage capacity and driving safety in rainy weather. It also enhances the water accumulation capacity of sponge cities, providing new ideas and methods for the development of sponge cities.

[0024] 2. The roadbed material prepared by this invention has a uniform size and open, interconnected structure, which is conducive to the release of heat. Unlike traditional concrete pavement, it does not have the problem of not being able to release heat and thus causing prolonged high temperatures. It can increase air humidity, improve the urban heat island effect, absorb dust in the air, reduce dust pollution, and absorb noise from vehicles, thus reducing maintenance costs.

[0025] 3. This invention utilizes engineered stone waste to transform waste into reusable resources, reducing the extraction of primary resources and promoting sustainable resource utilization. It also reduces potential environmental pollution and ecological damage. Furthermore, it decreases energy consumption during the extraction and production of new resources, contributing to lower energy consumption and greenhouse gas emissions, and promoting sustainable social development.

[0026] 4. By adding rubber granules, this invention can increase the porosity of the permeable roadbed, improve its permeability, and help reduce road surface water accumulation and waterlogging. At the same time, it can also increase the flexibility and elasticity of the roadbed, improve its compressive strength, and extend the service life of the road surface. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a construction method for an open, interconnected hole structure.

[0028] Figure 2The image shows a comparison of the compressive strength of samples prepared according to the methods of Examples 1-3 and Comparative Examples 1-4.

[0029] Figure 3 The graph shows the comparison results of the flexural strength of the samples prepared according to the methods of Examples 1-3 and Comparative Examples 1-4.

[0030] Figure 4 The graph shows the comparison results of the water permeability coefficients of the samples prepared according to the methods of Examples 1-3 and Comparative Examples 1-4.

[0031] Figure 5 The graph shows the comparison results of water permeability of samples prepared according to the methods of Examples 1-3 and Comparative Examples 1-4.

[0032] In the diagram: 1-permeable roadbed slurry; 2-inflated air; 3-inflating pipe; 4-inflating hole; 5-wire mesh with a mesh size of 5mm×5mm; 6-air inflated into the roadbed. Detailed Implementation

[0033] To more clearly illustrate the present invention, the following specific embodiments will be used to further explain the invention.

[0034] I. Preparation Examples

[0035] Example 1

[0036] The permeable roadbed material made from quartz waste in this embodiment is prepared by mixing the following raw materials in weight percentage: 1 part quartz waste, 0.2 parts cementitious material, 0.2 parts rubber granule powder, 0.1 parts fly ash, 3.5 parts aggregate, 0.01 parts modified foaming agent, 0.01 parts nano calcium carbonate, and 0.4 parts water.

[0037] The diameter of the quartz waste residue is 5mm to 10mm, and more than 60% of the quartz waste residue has a diameter of 6mm to 8mm; the cementing material is a mixture of sodium silicate and water-based epoxy resin in a mass ratio of 4:5, and the modulus of the sodium silicate is 20, and the modulus of the water-based epoxy resin is 50; the aggregate is gravel, wherein 55% to 65% of the aggregate has a particle size of 10 to 15mm, and 35% to 45% of the aggregate has a particle size of 5 to 8mm;

[0038] The improved foaming agent is prepared from the following raw materials in parts by weight: 20 parts H2O2, 15 parts NaHCO3, 20 parts aluminum powder, 20 parts sodium dodecyl sulfate, 5 parts E607L, 25 parts potassium laurate, and 10 parts water.

[0039] The specific preparation steps are as follows:

[0040] 1. Weigh the raw materials according to the appropriate weight fraction to prepare the modified foaming agent. The preparation steps are as follows:

[0041] (1) Mix H2O2, NaHCO3, aluminum powder and 5 parts of water to obtain a mixture;

[0042] (2) Heat the mixture obtained in step (1) in a 45°C water bath, stir at a speed of 300 rpm for 10 min;

[0043] (3) Add sodium dodecyl sulfate, E607L, potassium laurate and 5 parts water during the stirring process, stir for 10 minutes, and cool the mixture to room temperature to obtain the modified foaming agent.

[0044] 2. Weigh the appropriate raw materials according to their weight percentages to prepare the permeable roadbed material made from engineered stone waste. The preparation steps are as follows:

[0045] (1) Mix and stir the slag, cementitious materials, rubber granules, fly ash, nano calcium carbonate, aggregates and water to obtain a clean slurry.

[0046] (2) Mix the modified foaming agent with the slurry obtained in step (1), stir evenly to obtain a foam slurry, and pour the foam slurry into a mold or pour it on site for construction.

[0047] (3) Before pouring, lay a 5mm×5mm wire mesh. During construction, air is injected into the poured slurry through pre-embedded air-filled pipes to create an open, interconnected pore structure, thus obtaining the permeable roadbed material. A schematic diagram of the construction method is shown below. Figure 1 As shown.

[0048] Example 2

[0049] The permeable roadbed material made from quartz waste in this embodiment is prepared by mixing the following raw materials in weight percentage: 1 part quartz waste, 0.4 parts cementitious material, 0.3 parts rubber granules, 0.3 parts fly ash, 0.03 parts silica fume, 4 parts aggregate, 0.03 parts modified foaming agent, 0.02 parts nano calcium carbonate, and 0.5 parts water.

[0050] The diameter of the quartz waste residue is 5mm to 10mm, and more than 60% of the quartz waste residue has a diameter of 6mm to 8mm; the cementing material is a mixture of sodium silicate and water-based epoxy resin in a mass ratio of 4:5; the modulus of the sodium silicate is 20, and the modulus of the water-based epoxy resin is 60; the aggregate is gravel, wherein 55% to 65% of the aggregate has a particle size of 10 to 15mm, and 35% to 45% of the aggregate has a particle size of 5 to 8mm;

[0051] The improved foaming agent is prepared from the following raw materials in parts by weight: 15 parts H2O2, 12 parts NaHCO3, 18 parts aluminum powder, 15 parts sodium dodecyl sulfate, 12 parts E607L, 23 parts potassium laurate, and 15 parts water.

[0052] The specific preparation steps are as follows:

[0053] 1. Weigh the raw materials according to the appropriate weight fraction to prepare the modified foaming agent. The preparation steps are as follows:

[0054] (1) Mix H2O2, NaHCO3, aluminum powder and 8 parts of water to obtain a mixture;

[0055] (2) Place the mixture obtained in step (1) in a 50°C water bath and heat it while stirring. The stirring speed is 450 rpm and the stirring time is 15 min.

[0056] (3) Add sodium dodecyl sulfate, E607L, potassium laurate and 7 parts water during the stirring process, stir for another 20 minutes, and cool the mixture to room temperature to obtain the modified foaming agent.

[0057] 2. Weigh the appropriate raw materials according to their weight percentages to prepare the permeable roadbed material made from engineered stone waste. The preparation steps are as follows:

[0058] (1) Mix and stir the slag, cementitious materials, rubber granules, fly ash, silica fume, nano calcium carbonate, aggregates and water to obtain a clean slurry;

[0059] (2) Mix the modified foaming agent with the slurry obtained in step (1), stir evenly to obtain a foam slurry, and pour the foam slurry into a mold or pour it on site for construction.

[0060] (3) Before pouring, lay a 5mm×5mm wire mesh. During construction, air is injected into the poured slurry through pre-embedded air-filled pipes to create an open, interconnected pore structure, thus obtaining the permeable roadbed material. A schematic diagram of the construction method is shown below. Figure 1 As shown.

[0061] Example 3

[0062] The permeable roadbed material made from quartz waste in this embodiment is prepared by mixing the following raw materials in weight percentage: 1.2 parts quartz waste, 0.6 parts cementitious material, 0.6 parts rubber granules, 0.5 parts fly ash, 0.06 parts silica fume, 5 parts aggregate, 0.04 parts modified foaming agent, 0.03 parts nano calcium carbonate, and 0.6 parts water.

[0063] The diameter of the quartz waste residue is 5mm to 10mm, and more than 60% of the quartz waste residue has a diameter of 6mm to 8mm; the cementing material is a mixture of sodium silicate and water-based epoxy resin in a mass ratio of 4:5, and the modulus of the sodium silicate is 30, and the modulus of the water-based epoxy resin is 80; the aggregate is gravel, wherein 55% to 65% of the aggregate has a particle size of 10 to 15mm, and 35% to 45% of the aggregate has a particle size of 5 to 8mm;

[0064] The improved foaming agent is prepared from the following raw materials in parts by weight: 10 parts H2O2, 10 parts NaHCO3, 15 parts aluminum powder, 10 parts sodium dodecyl sulfate, 10 parts E607L, 20 parts potassium laurate, and 20 parts water.

[0065] The specific preparation steps are as follows:

[0066] 1. Weigh the raw materials according to the appropriate weight fraction to prepare the modified foaming agent. The preparation steps are as follows:

[0067] (1) Mix H2O2, NaHCO3, aluminum powder and 10 parts of water to obtain a mixture;

[0068] (2) Place the mixture obtained in step (1) in a 55°C water bath and heat it while stirring. The stirring speed is 500 rpm and the stirring time is 10 min.

[0069] (3) Add sodium dodecyl sulfate, E607L, potassium laurate and 10 parts of water during the stirring process, stir for another 30 minutes, and cool the mixture to room temperature to obtain the modified foaming agent.

[0070] 2. Weigh the appropriate raw materials according to their weight percentages to prepare the permeable roadbed material made from engineered stone waste. The preparation steps are as follows:

[0071] (1) Mix and stir the slag, cementitious materials, rubber granules, fly ash, silica fume, nano calcium carbonate, aggregates and water to obtain a clean slurry;

[0072] (2) Mix the modified foaming agent with the slurry obtained in step (1), stir evenly to obtain a foam slurry, and pour the foam slurry into a mold or pour it on site for construction.

[0073] (3) Before pouring, lay a 5mm×5mm wire mesh. During construction, air is injected into the poured slurry through pre-embedded air-filled pipes to create an open, interconnected pore structure, thus obtaining the permeable roadbed material. A schematic diagram of the construction method is shown below. Figure 1 As shown.

[0074] Comparative Example 1

[0075] The permeable roadbed material made from quartz waste in this comparative example is prepared by mixing the following raw materials in weight percentage: 1 part quartz waste, 0.2-0.6 parts cementitious material, 0.3 parts rubber granules, 0.3 parts fly ash, 0.03 parts silica fume, 4 parts aggregate, 0.03 parts sodium dodecyl sulfate, 0.02 parts nano calcium carbonate, and 0.4-0.6 parts water;

[0076] The difference between this comparative example and Example 2 is that sodium dodecyl sulfate is used instead of the modified foaming agent in this comparative example. The other conditions are the same as in Example 2, and the preparation method of the permeable roadbed material of the quartz waste is also the same as in Example 2.

[0077] Comparative Example 2

[0078] The permeable roadbed material made from quartz waste in this comparative example is prepared by mixing the following raw materials in weight percentage: 1 part quartz waste, 0.2-0.6 parts cementitious material, 0.3 parts rubber granules, 0.3 parts fly ash, 0.03 parts silica fume, 4 parts aggregate, 0.03 parts E607L, 0.02 parts nano calcium carbonate, and 0.4-0.6 parts water;

[0079] The difference between this comparative example and Example 2 is that E607L is used instead of the modified foaming agent in this comparative example, while the other conditions are the same as in Example 2. The method for preparing the permeable roadbed material of the quartz waste is also the same as in Example 2.

[0080] Comparative Example 3

[0081] The permeable roadbed material made from quartz waste in this comparative example is prepared by mixing the following raw materials in weight percentage: 1 part quartz waste, 0.2-0.6 parts cementitious material, 0.3 parts rubber granules, 0.3 parts fly ash, 0.03 parts silica fume, 4 parts aggregate, 0.03 parts potassium laurate, 0.02 parts nano calcium carbonate, and 0.4-0.6 parts water;

[0082] The difference between this comparative example and Example 2 is that potassium laurate is used instead of the modified foaming agent in this comparative example. The other conditions are the same as in Example 2, and the preparation method of the permeable roadbed material of the quartz waste is also the same as in Example 2.

[0083] Comparative Example 4

[0084] The permeable roadbed material of the quartz waste in this comparative example is prepared by mixing the following raw materials in weight percentage: 1 part quartz waste, 0.2-0.6 parts cementitious material, 0.3 parts fly ash, 0.03 parts silica fume, 4 parts aggregate, 0.03 parts modified foaming agent, 0.02 parts nano calcium carbonate, and 0.4-0.6 parts water;

[0085] The difference between this comparative example and Example 2 is that no rubber powder particles were added in this comparative example, while the other conditions are the same as in Example 2. The method for preparing the permeable roadbed material of the quartz waste is also the same as in Example 2.

[0086] II. Sample Performance Testing

[0087] The samples prepared using the methods described in Examples 1-3 and Comparative Examples 1-4 of this invention were subjected to performance tests, and the results are as follows: Figure 2-5 As shown. By Figure 2-5 It can be seen that the permeable roadbed materials prepared in Examples 1-3 of this invention have good compressive strength and can extend the service life of the road surface; they also have good permeability, which helps to reduce road surface water accumulation and waterlogging. However, the permeable roadbed materials prepared in Comparative Examples 1-4 show a certain reduction in the number of micropores generated by foaming due to changes in raw materials, along with a certain degree of decrease in foam stability, compressive strength, flexural strength, and permeability coefficient. Therefore, the use of a modified foaming agent yields the best results.

[0088] The above description is a detailed description of the preferred embodiments of the present invention. However, the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications made under the technical spirit of the present invention should fall within the patent scope covered by the present invention.

Claims

1. A permeable roadbed material made of engineered stone waste, characterized in that, The composition includes the following components by weight: 1-1.2 parts of engineered stone waste, 0.2-0.6 parts of cementitious material, 0.2-0.6 parts of rubber granule powder, 0.1-0.5 parts of fly ash, 0-0.06 parts of silica fume, 3.5-5 parts of aggregate, 0.01-0.04 parts of modified foaming agent, 0.01-0.03 parts of nano-calcium carbonate, and 0.4-0.6 parts of water; The aggregate is gravel; the cementing material is a mixture of sodium silicate and water-based epoxy resin in a mass ratio of 4:

5. The improved foaming agent is prepared from the following raw materials in parts by weight: 10-20 parts H2O2, 10-15 parts NaHCO3, 15-20 parts aluminum powder, 10-20 parts sodium dodecyl sulfate, 10-15 parts E607L, 20-25 parts potassium laurate, and 10-20 parts water. The modified foaming agent is prepared by the following method: (1) Mix H2O2, NaHCO3, aluminum powder and water in the weight ratio to obtain a mixture; (2) Heat the mixture obtained in step (1) at 45-55°C and stir it at a speed of 300-500 rpm for 10-20 min. (3) Add sodium dodecyl sulfate, E607L, potassium laurate and 5-10 parts of water during the stirring process, stir for 10-30 minutes, and cool the mixture to room temperature to obtain the modified foaming agent. The permeable roadbed material made from engineered stone waste residue is prepared through the following steps: (1) Mix and stir the slag, cementitious material, rubber granules, fly ash, silica fume, nano calcium carbonate, aggregate, and water to obtain a clean slurry; (2) Mix the modified foaming agent with the slurry obtained in step (1), stir evenly to obtain a foam slurry, and pour the foam slurry into a mold or pour it on site for construction. (3) During construction, air is injected into the poured slurry through pre-embedded air-filled pipes to form an open and interconnected hole structure, thus obtaining the permeable roadbed material.

2. The permeable roadbed material made of engineered stone waste as described in claim 1, characterized in that, The diameter of the quartz waste residue is 5mm to 10mm.

3. The permeable roadbed material made of engineered stone waste as described in claim 2, characterized in that, More than 60% of the quartz waste residue has a diameter of 6mm to 8mm.

4. The permeable roadbed material made of engineered stone waste as described in claim 1, characterized in that, 55%–65% of the aggregate has a particle size of 10–15 mm, and 35%–45% of the aggregate has a particle size of 5–8 mm.

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