Anti-corrosion pervious concrete and preparation method thereof

Abstract

The invention relates to the technical field of concrete, and discloses corrosion-resistant pervious concrete and a preparation method thereof, and the corrosion-resistant pervious concrete comprises the following components by weight: 150-400 parts of coarse-grained gravel; 150 to 180 parts of sand; 150 to 180 parts of cement; 60 to 80 parts of coarse aggregate; 20 to 30 parts of an admixture; 500 to 550 parts of water; 50-80 parts of an antifreeze agent; 40 to 60 parts of a water reducing agent; 60 to 80 parts of metal; according to the anti-corrosion pervious concrete and the preparation method thereof, the metal chippings and the spherical metal with a specific structure are added in the preparation process, so that supporting points in the concrete are increased, the structural strength of the concrete is improved, and the concrete can bear a larger load; the compressive strength and breaking strength of the concrete are obviously higher than those of corrosion-resistant pervious concrete prepared in the prior art, and the concrete can meet various engineering scenes with high strength requirements. Meanwhile, the reasonable raw material ratio and the addition of the admixture further enhance the strength of the concrete.

Description

Technical Field

[0001] This invention relates to the field of concrete technology, specifically to a corrosion-resistant permeable concrete and its preparation method. Background Technology

[0002] Permeable concrete, as an eco-friendly type of concrete, is made from a specific mix of cement, water, aggregates, admixtures, additives, and inorganic pigments using a special process. It features continuous porosity. Compared to ordinary concrete, it offers significant advantages: it allows rainwater to quickly infiltrate the ground, effectively promoting water circulation, replenishing groundwater, and mitigating problems such as the rapid decline of urban groundwater levels; it also absorbs noise from vehicles, reduces road slippage, and prevents glare, greatly improving the comfort and safety of vehicles and pedestrians.

[0003] However, in practical applications, existing technologies for preparing corrosion-resistant permeable concrete have significant shortcomings. While enhancing its corrosion resistance and permeability, it's difficult to guarantee the concrete's strength. For example, in some coastal areas or regions with severe industrial pollution, concrete is subjected to long-term erosion by seawater and chemicals, leading to a rapid decline in strength, shortened service life, and increased maintenance costs. Furthermore, some permeable concrete is prone to cracking and loosening under frequent rainwater erosion and vehicle loads, affecting its normal use. Therefore, developing a corrosion-resistant permeable concrete and its preparation method that possesses both good corrosion resistance and permeability while ensuring high strength is of significant practical importance. Summary of the Invention

[0004] The purpose of this invention is to provide a corrosion-resistant permeable concrete and its preparation method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a corrosion-resistant permeable concrete, composed of the following components in the indicated weight ratios: 150-400 parts of coarse-grained crushed stone; 150-180 parts sand; 150-180 parts cement; 60-80 parts coarse aggregate; 20-30 parts of admixture; 500-550 parts water; 50-80 parts antifreeze; 40-60 parts of water-reducing agent; 60-80 parts of metal; 40-60 parts corrosion inhibitor.

[0006] Optionally, the metal includes metal shavings generated by punching holes in a bar stock, and spherical metal after the punched bar stock has been shaped into a sphere and cut with through holes.

[0007] Optionally, the admixture is one or a mixture of fly ash, slag powder, and silica fume. Optionally, the corrosion inhibitor is one or a mixture of epoxy resin emulsion, silane coupling agent, and acrylate emulsion.

[0008] This invention also proposes a method for preparing corrosion-resistant permeable concrete, comprising the following steps: S1. Drill holes in the bar stock to produce chips, process the tubular metal and chips, and thoroughly mix the metal chips with coarse-grained crushed stone, sand, cement, coarse aggregate, and admixtures. S2. Process the punched bar into a spherical shape and cut it to make it have through holes. Add the spherical metal with through holes to the raw materials mixed in step one for mixing. S3. Add water, antifreeze, water-reducing agent, remaining metal, and corrosion inhibitor to the materials mixed in step two and mix again to prepare concrete.

[0009] Optionally, the parameters of the drilling equipment in S1 are controlled to make the size of the drilled debris uniform. The S3 section uses a high-efficiency mixing device to control the mixing time, speed, and intensity, ensuring that the materials are fully and evenly mixed.

[0010] Optionally, during the mixing process of S1 and S2, the stirring speed is 80-120 r / min and the stirring time is 8-15 minutes.

[0011] Optionally, during the remixing process in S3, the stirring speed is 120-160 r / min and the stirring time is 15-20 minutes.

[0012] Compared with the prior art, the present invention provides a corrosion-resistant permeable concrete and its preparation method, which has the following beneficial effects: 1. This corrosion-resistant permeable concrete and its preparation method, by adding metal scraps and spherical metal with a specific structure during the preparation process, increases the internal support points and structural strength of the concrete, enabling it to withstand greater loads. Its compressive and flexural strengths are significantly higher than those of corrosion-resistant permeable concrete prepared by existing technologies, meeting the requirements of various engineering scenarios with high strength requirements. Furthermore, the reasonable raw material ratio and the addition of admixtures further enhance the strength of the concrete.

[0013] 2. This corrosion-resistant permeable concrete and its preparation method, along with the rational addition of corrosion inhibitors and optimization of the concrete's internal structure, enable it to effectively resist the erosion of various corrosive media such as seawater and chemicals, significantly extending the concrete's service life and reducing maintenance costs. It is particularly suitable for areas with severe corrosive environments, such as coastal regions and chemical industrial parks. The synergistic effect of different types of corrosion inhibitors protects the concrete from multiple angles, improving its corrosion resistance.

[0014] 3. The corrosion-resistant permeable concrete and its preparation method, with the through-holes of the spherical metal and the reasonable aggregate gradation, give the concrete a continuous and uniform pore structure, good permeability, and can quickly allow rainwater to seep into the ground, effectively promoting water circulation, alleviating urban flooding and other problems, which meets the needs of sponge city construction.

[0015] 4. This corrosion-resistant permeable concrete and its preparation method fully utilize industrial waste and other raw materials during the preparation process, reducing resource waste and environmental pollution. Simultaneously, by optimizing the mix proportions and preparation process, energy consumption during production is reduced, achieving the dual goals of environmental protection and energy conservation. Furthermore, the preparation method is rationally designed, simple to operate, and easy to control. Clearly defined mixing parameters enable the rapid and efficient preparation of high-quality corrosion-resistant permeable concrete on-site, improving construction efficiency and reducing construction difficulty. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the process of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 As shown, the present invention provides a technical solution: a corrosion-resistant permeable concrete, composed of the following components in the indicated weight ratios: Coarse-grained crushed stone: 150-400 parts. As one of the main aggregates in concrete, coarse-grained crushed stone can provide greater skeletal support and enhance the strength of concrete; its dosage can be adjusted according to the actual requirements of the project for concrete strength and permeability.

[0019] Sand: 150-180 parts. Sand is used to fill the gaps in the coarse-grained crushed stone, making the concrete structure more compact and also having a certain regulating effect on the workability of the concrete.

[0020] Cement: 150-180 parts; Cement acts as a binder, binding other aggregates and other components together to form a concrete structure with a certain strength and durability. The appropriate selection of its dosage is crucial to the performance of the concrete.

[0021] Coarse aggregate: 60-80 parts; coarse aggregate and coarse crushed stone together form the skeleton of concrete, further enhancing the load-bearing capacity and strength of concrete.

[0022] Admixtures: 20-30 parts; the admixtures are one or more mixtures of fly ash, slag powder, and silica fume. The addition of these admixtures can improve certain properties of concrete, such as increasing its durability and workability, while also reducing costs and saving resources.

[0023] For example, fly ash has pozzolanic activity and can undergo a secondary reaction with calcium hydroxide produced during cement hydration to generate more gel substances, which fill the pores inside the concrete and improve its density and durability; slag powder can refine cement particles, improve the particle size distribution of cement, and increase the degree of cement hydration, thereby enhancing the strength of concrete; silica fume has extremely fine particles and a large specific surface area, and has high pozzolanic activity, which can significantly improve the early strength and durability of concrete, as well as improve its impermeability and resistance to chemical attack.

[0024] Water: 500-550 parts; Water participates in the hydration reaction of cement in concrete, causing the cement to harden and thus giving the concrete strength. A suitable water-cement ratio is one of the key factors in ensuring concrete performance. This invention ensures the workability and strength of concrete by rationally controlling the amount of water used.

[0025] Antifreeze agent: 50-80 parts; In cold regions, the addition of antifreeze agent can effectively improve the frost resistance of concrete, prevent concrete from being damaged by freeze-thaw cycles in low-temperature environments, and extend the service life of concrete. The working principle of antifreeze agent is mainly to lower the freezing point of the liquid phase in concrete, so that concrete can still maintain a certain liquid phase at sub-zero temperatures, ensuring that the hydration reaction of cement continues, while reducing the expansion stress caused by freezing inside the concrete, thereby improving the frost resistance of concrete.

[0026] Water-reducing agent: 40-60 parts; Water-reducing agents can reduce the amount of water in concrete without affecting its workability, thereby lowering the water-cement ratio and improving the strength and durability of concrete. Simultaneously, water-reducing agents can also improve the fluidity of concrete, facilitating construction. The mechanism of action of water-reducing agents is that the active groups in their molecular structure adsorb onto the surface of cement particles, causing the cement particles to carry the same charge and generating electrostatic repulsion. This disperses the cement particles, releasing the water trapped within them, thus achieving the water-reducing effect.

[0027] Metal: 60-80 parts. This includes metal scraps generated during the preceding processing and spherical metal pieces with through-holes. The addition of metal significantly enhances the strength of the concrete, while the through-holes in the spherical metal increase its permeability, giving the concrete both high strength and good permeability.

[0028] Corrosion inhibitor: 40-60 parts. The corrosion inhibitor is one or a mixture of epoxy resin emulsion, silane coupling agent, and acrylic emulsion. These corrosion inhibitors can form a protective film on and inside the concrete surface, effectively resisting the erosion of external corrosive substances, improving the corrosion resistance of concrete, and extending the service life of concrete in harsh environments. For example, epoxy resin emulsion can form a tough coating on the concrete surface, preventing the intrusion of corrosive media; silane coupling agent can chemically react with the inorganic components in concrete to form a hydrophobic silane film on the concrete surface, improving the impermeability and chemical erosion resistance of concrete; acrylic emulsion has good film-forming properties and weather resistance, and can form a continuous protective film on the concrete surface, protecting the concrete from external environmental erosion.

[0029] The metal includes metal shavings generated from drilling holes in bar stock, and spherical metal formed by processing the drilled bar stock into a spherical shape and cutting through holes. The admixture is one or more mixtures of fly ash, slag powder, and silica fume. The corrosion inhibitor is one or more mixtures of epoxy resin emulsion, silane coupling agent, and acrylate emulsion.

[0030] This embodiment also proposes a method for preparing corrosion-resistant permeable concrete, including the following steps: S1. Drill holes in the bar stock to produce fragments, processing them into tubular metal and fragments. Thoroughly mix the metal fragments with coarse-grained crushed stone, sand, cement, coarse aggregate, and admixtures. Control the parameters of the drilling equipment to ensure uniform fragment size. Specifically, select metal bars of appropriate specifications and fix them on the drilling equipment. By controlling the parameters of the drilling equipment, such as the drilling depth and spacing, ensure uniform fragment size. Then, thoroughly mix the processed metal fragments with other raw materials, such as coarse-grained crushed stone, sand, cement, coarse aggregate, and admixtures. During the mixing process, control the stirring speed at 80-120 r / min and maintain the stirring time at 8-15 minutes. The addition of metal fragments increases the structural support points within the concrete, thereby effectively improving the concrete's strength.

[0031] S2. Process the perforated bar stock into spherical shapes and cut them to create through-holes. Add the spherical metal with through-holes to the raw materials mixed in step one and mix. Continue mixing at a speed of 80-120 rpm for 8-15 minutes. These structural and supporting spherical metals, when used in concrete preparation, significantly enhance the concrete's hardness. Simultaneously, the through-holes in the spherical metal increase the concrete's permeability, and their shape allows for better mixing with other materials, preventing sharp edges from affecting the concrete's performance. S3. Add water, antifreeze, water-reducing agent, remaining metal, and corrosion inhibitor to the materials mixed in step two and mix again to prepare concrete. Use high-efficiency mixing equipment and control the mixing time, speed, and intensity to ensure that the materials are fully and evenly mixed. Use high-efficiency mixing equipment, increase the mixing speed to 120-160 r / min, and control the mixing time to 15-20 minutes to ensure that all materials are fully and evenly mixed and that the components are tightly bound together, thereby preparing high-performance corrosion-resistant permeable concrete.

[0032] During the second mixing process, the stirring speed is 120-160 r / min and the stirring time is 15-20 minutes.

[0033] In addition, during the mixing process of S1 and S2, the stirring speed is 80-120 r / min and the stirring time is 8-15 minutes.

[0034] As one application of this embodiment: This invention increases the internal support points and structural strength of concrete by adding metal scraps and spherical metals with a specific structure during the preparation process. This allows the concrete to withstand greater loads, and its compressive and flexural strengths are significantly higher than those of corrosion-resistant permeable concrete prepared by existing technologies, meeting the needs of various engineering scenarios with high strength requirements. Furthermore, the reasonable raw material ratio and the addition of admixtures further enhance the strength of the concrete.

[0035] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A corrosion-resistant permeable concrete, characterized in that, It consists of the following components in the following weight ratios: 150-400 parts of coarse-grained crushed stone; 150-180 parts sand; 150-180 parts cement; 60-80 parts coarse aggregate; 20-30 parts of admixture; 500-550 parts water; 50-80 parts antifreeze; 40-60 parts of water-reducing agent; 60-80 parts of metal; 40-60 parts corrosion inhibitor.

2. The corrosion-resistant permeable concrete according to claim 1, characterized in that, The metal includes metal shavings generated by punching holes in bar stock, and spherical metal after the punched bar stock is processed into a spherical shape and cut with through holes.

3. The corrosion-resistant permeable concrete according to claim 1, characterized in that, The admixture is one or more of fly ash, slag powder, and silica fume.

4. The corrosion-resistant permeable concrete according to claim 1, characterized in that, The corrosion inhibitor is one or more of epoxy resin emulsion, silane coupling agent, and acrylate emulsion, or a mixture thereof.

5. A method for preparing corrosion-resistant permeable concrete as described in any one of claims 1-4, characterized in that, Includes the following steps: S1. Drill holes in the bar stock to produce chips, process the tubular metal and chips, and thoroughly mix the metal chips with coarse-grained crushed stone, sand, cement, coarse aggregate, and admixtures. S2. Process the punched bar into a spherical shape and cut it to make it have through holes. Add the spherical metal with through holes to the raw materials mixed in step one for mixing. S3. Add water, antifreeze, water-reducing agent, remaining metal, and corrosion inhibitor to the materials mixed in step two and mix again to prepare concrete.

6. The method for preparing corrosion-resistant permeable concrete according to claim 5, characterized in that, The parameters of the drilling equipment in S1 are controlled to ensure that the generated debris is of uniform size. The S3 section uses a high-efficiency mixing device to control the mixing time, speed, and intensity, ensuring that the materials are fully and evenly mixed.

7. The method for preparing corrosion-resistant permeable concrete according to claim 5, characterized in that, During the mixing process of S1 and S2, the stirring speed is 80-120 r / min and the stirring time is 8-15 minutes.

8. The method for preparing corrosion-resistant permeable concrete according to claim 5, characterized in that, During the remixing process of S3, the stirring speed is 120-160 r / min and the stirring time is 15-20 minutes.

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