Preparation method of enhanced antiskid permeable pavement

Abstract

The preparation method comprises the following steps: uniformly mixing and stirring 200 to 250 parts of cement, 20 to 50 parts of fly ash, 300 to 400 parts of coarse aggregate with the particle size of 5mm to 10mm, 250 to 350 parts of machine-made sand, 1 to 5 parts of water reducing agent, 0.1 to 0.2 part of defoaming agent and 3 to 8 parts of synthetic fiber to obtain a water-permeable base layer mixture; paving a water-permeable base layer; the preparation method comprises the following steps: mixing 100-200 parts of cement, 700-800 parts of fine aggregate with the particle size of 3mm-5mm, 100-120 parts of fly ash and 5-10 parts of a reinforcing agent; paving a water permeable surface layer with a water collecting tank and a water permeable blind ditch; anti-skid textures are arranged on the surface of the first layer of finish paint; and after the preset texture is shaped, a layer of finish-coat paint is sprayed again. The strength, water permeability and skid resistance of the pavement can be remarkably enhanced.

Description

Technical Field

[0001] This invention relates to the field of permeable pavement manufacturing technology, specifically to a method for preparing an enhanced anti-skid permeable pavement. Background Technology

[0002] With the acceleration of urbanization, urban roads face numerous problems, among which insufficient anti-skid and permeability pose significant challenges to traffic safety and the urban ecosystem. Traditional roads are prone to water accumulation during rainy days, causing vehicles to skid and pedestrians to slip, increasing the probability of traffic accidents. Simultaneously, impermeable pavements prevent rainwater from naturally infiltrating, leading to frequent urban flooding, a drop in groundwater levels, and disruption of the urban ecological balance. Existing permeable pavements have several drawbacks in application, specifically: 1. Insufficient strength and load-bearing capacity: The porous structure of permeable pavements typically results in lower mechanical strength compared to traditional paving materials. For example, the compressive strength of permeable concrete is generally C30-C35, making it difficult to withstand the long-term pressure of heavy vehicles (such as trucks), easily leading to cracking or aggregate detachment. 2. Inappropriate material selection: For example, low-strength aggregates, insufficient binder grades, or improper construction (such as uneven mixing and insufficient compaction) can further exacerbate strength problems. In northern regions, freeze-thaw cycles can reduce strength by more than 30%. 3. Lack of anti-slip function: Anti-slip is not an added feature, but the lifeline of permeable pavements. Existing permeable pavements can only "permeate water" but are difficult to "prevent slipping." Soon after construction, surface wear, pore blockage, and a sharp drop in anti-slip performance occur. According to the Ministry of Housing and Urban-Rural Development's 2023 Urban Infrastructure Safety Assessment Report, over 60% of permeable pavement projects nationwide experienced functional degradation within 1-2 years of use, with "anti-slip failure" accounting for as high as 43%. Permeability without anti-slip makes safety meaningless. Many manufacturers use low-grade cement and inferior aggregates to reduce costs, resulting in poor surface density. Rainwater quickly wears down the texture, and the coefficient of friction plummets from an initial 0.7 to below 0.3 (the national standard requires ≥0.5), making it like "slippery ceramic tiles." With the upgrade of the "Urban Slow Traffic System Construction Guidelines" and the "Green Building Evaluation Standard," the three-in-one indicator of "permeability + anti-slip value + durability" will become the mandatory indicators for permeable pavements. 4. Pore clogging and reduced permeability: Pores are easily clogged by dust, fallen leaves, oil, and other debris, leading to a decrease or even failure of permeability. 5. Limited environmental adaptability: First, climate influences play a role. In cold regions, winter water accumulation and freezing can cause pavement bulging or cracking; air-entraining agents or timely snow removal are necessary, but freeze-thaw damage can still occur if the base layer drainage is poor. Second, special environments are problematic. Dust or fumes in highly polluted areas (such as industrial zones) can accelerate pore clogging; high groundwater levels in soft soil can lead to water accumulation in the base layer and pavement hollowing, requiring additional measures such as drainage blind ditches. 6. High construction process requirements: Permeable pavement construction is sensitive to material ratios, compaction, and curing time. For example, improper adhesive application or inadequate curing in colored permeable paved pavement can easily lead to problems such as sanding and insufficient strength. The construction team needs professional experience; under tight deadlines, omissions in steps can create hidden quality issues. 7. Maintenance costs and lifespan issues: Regular cleaning (such as high-pressure washing) and local repairs are necessary measures to maintain performance, but the frequency and cost of maintenance are often overlooked.Some permeable concrete exhibits poor durability, and its lifespan may be shortened under freeze-thaw cycles or corrosive environments, requiring material optimization (such as adding fibers or anti-corrosion coatings) to extend its service life. 8. Economic and Standardization Challenges: The initial cost of permeable pavements is typically higher than that of ordinary concrete, and quality control is more difficult due to the lack of unified design specifications and construction standards. Its applicability is limited in roads with high load requirements (such as main roads) or sloping terrain, potentially requiring additional engineering measures. Summary of the Invention

[0003] 1. The technical problem to be solved:

[0004] To enhance the strength, permeability, and anti-skid properties of road surfaces, this invention provides a method for preparing an enhanced anti-skid permeable road surface.

[0005] 2. Technical Solution:

[0006] A method for preparing an enhanced anti-skid permeable pavement, characterized in that it includes:

[0007] Step 1: Prepare permeable base course mixture; Mix 200-250 parts cement, 20-50 parts fly ash, 300-400 parts coarse aggregate with a particle size of 5mm-10mm, 250-350 parts manufactured sand, 1-5 parts water-reducing agent, 0.1-0.2 parts defoamer, and 3-8 parts synthetic fiber evenly to obtain permeable base course mixture;

[0008] Step 2: Laying the permeable base layer; After cleaning and reinforcing the subgrade in the construction area, spread the permeable base layer mixture evenly on the surface of the subgrade, and ensure that the surface of the permeable base layer is flat.

[0009] Step 3: Prepare permeable surface layer mixture; mix 100-200 parts of cement, 700-800 parts of fine aggregate with a particle size of 3mm-5mm, 100-120 parts of fly ash, and 5-10 parts of reinforcing agent; wherein the reinforcing agent is a special powdered admixture for permeable concrete, and stir evenly to form permeable surface layer mixture;

[0010] Step 4: Lay a permeable surface layer and install a water collection trough and a permeable blind ditch inside the permeable surface layer; the water collection trough and the permeable blind ditch extend along the width of the road surface to the drainage channel on the side of the road; the water collection trough is located inside the permeable blind ditch, and the upper opening of the permeable blind ditch is larger than the bottom.

[0011] Step 5: Spray the first coat of paint onto the laid permeable surface; wait a few minutes for the preset texture to be evenly distributed on the road surface to achieve the anti-slip function.

[0012] Step Six: Apply the second coat of topcoat: After the preset texture has set, apply another coat of topcoat 30-50 minutes later.

[0013] Furthermore, the main body of the anti-slip permeable pavement includes, from top to bottom, a topcoat protective layer, a permeable surface layer, and a permeable base layer.

[0014] Furthermore, in step one of preparing the permeable base course mixture, the cement is of type P.O52.5; the fineness modulus of the manufactured sand is 2.6 to 3.2; the synthetic fiber is 10 mm to 14 mm long polyoxymethylene fiber; the coarse aggregate is crushed basalt or quartzite; and the mixing time in this step is 2 to 5 minutes.

[0015] Furthermore, during the laying processes in steps two and four, the laid permeable concrete is vibrated and compacted.

[0016] Furthermore, in step three, the cement used in preparing the permeable surface layer mixture is P.O52.5 or P.W52.5; the fine aggregate is crushed basalt or quartzite; and the mixing time is 5-8 minutes.

[0017] Furthermore, in step five, the preset texture is wavy or / and pointed; the texture depth is 2-3mm.

[0018] Furthermore, the wavy and / or pointed shapes are inlaid with permeable particles.

[0019] 3. Beneficial effects:

[0020] (1) The reinforced anti-skid permeable pavement prepared by the present invention has a permeable base layer of high-performance concrete, which has high strength and bearing capacity as the main load-bearing structure of the pavement; its internal pores are uniform, with high connectivity and no closed pores, which greatly increases the permeability of the material.

[0021] (2) The enhanced anti-skid permeable pavement prepared by the present invention uses smaller permeable aggregates for the permeable surface layer, and also has a drainage structure, namely a water collection trough and a permeable blind ditch, which improves the permeability and accelerates the diversion and infiltration of surface water on the road.

[0022] (3) The enhanced anti-slip permeable pavement prepared by the present invention has two layers of topcoat, one of which has mechanical embossing on its surface and wet anti-slip value (BPN) ≥55, which greatly reduces the risk of slipping and traffic accidents. Attached Figure Description

[0023] Figure 1 This is an overall schematic diagram of the enhanced anti-slip permeable pavement of the present invention.

[0024] Figure labels: 1. Topcoat protective layer; 2. Permeable surface layer; 3. Permeable base layer; 6. Water collection trough; 7. Permeable blind drain; 12. Plain soil layer. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings.

[0026] A method for preparing an enhanced anti-skid permeable pavement, characterized in that it includes:

[0027] Step 1: Prepare permeable base course mixture; Mix 200-250 parts cement, 20-50 parts fly ash, 300-400 parts coarse aggregate with a particle size of 5mm-10mm, 250-350 parts manufactured sand, 1-5 parts water-reducing agent, 0.1-0.2 parts defoamer, and 3-8 parts synthetic fiber evenly to obtain permeable base course mixture;

[0028] Step 2: Laying the permeable base layer; After cleaning and reinforcing the subgrade layer 12 in the construction area, the permeable base layer mixture is evenly spread on the surface of the subgrade layer, and the surface of the permeable base layer is flat.

[0029] Step 3: Prepare permeable surface layer mixture; mix 100-200 parts of cement, 700-800 parts of fine aggregate with a particle size of 3mm-5mm, 100-120 parts of fly ash, and 5-10 parts of reinforcing agent; wherein the reinforcing agent is a special powdered admixture for permeable concrete, and stir evenly to form permeable surface layer mixture;

[0030] Step 4: Lay a permeable surface layer and install a water collection trough and a permeable blind ditch inside the permeable surface layer; the water collection trough extends from the permeable blind ditch along the width of the road surface into the drainage channel at the roadside; the water collection trough is located inside the permeable blind ditch, and the upper opening of the permeable blind ditch is larger than the bottom.

[0031] Step 5: Spray the first coat of paint onto the laid permeable surface; wait a few minutes for the preset texture to be evenly distributed on the road surface to achieve the anti-slip function.

[0032] Step Six: Apply the second coat of topcoat: After the preset texture has set, apply another coat of topcoat 30-50 minutes later.

[0033] Furthermore, the main body of the anti-slip permeable pavement includes, from top to bottom, a topcoat protective layer, a permeable surface layer, and a permeable base layer.

[0034] Furthermore, in step one of preparing the permeable base course mixture, the cement is of type P.O52.5; the fineness modulus of the manufactured sand is 2.6 to 3.2; the synthetic fiber is 10 mm to 14 mm long polyoxymethylene fiber; the coarse aggregate is crushed basalt or quartzite; and the mixing time in this step is 2 to 5 minutes.

[0035] Furthermore, during the laying processes in steps two and four, the laid permeable concrete is vibrated and compacted.

[0036] Furthermore, in step three, the cement used in preparing the permeable surface layer mixture is P.O52.5 or P.W52.5; the fine aggregate is crushed basalt or quartzite; and the mixing time is 5-8 minutes.

[0037] Furthermore, in step five, the preset texture is wavy or / and pointed; the texture depth is 2-3mm.

[0038] Furthermore, the wavy and / or pointed shapes are inlaid with permeable particles.

[0039] As attached Figure 1 The diagram shown is an overall structural diagram of the road surface in this embodiment. The enhanced anti-skid permeable road surface includes a topcoat protective layer 1, a permeable surface layer 2, and a permeable base layer 3. The permeable surface layer 2 is provided with a water collection trough 6 and a permeable blind ditch 7.

[0040] Example 1:

[0041] First, weigh out P.O52.5 cement, fly ash, 10mm crushed stone, manufactured sand, water-reducing agent, defoamer, and 10mm long polyoxymethylene fiber according to a mass ratio of 200:20:300:250:1:0.1:3. Use a mixer to thoroughly mix the cement, fly ash, crushed stone, and manufactured sand to obtain a mixture. Add water to the mixture, stir evenly, then add the water-reducing agent, defoamer, and fiber weight, and continue stirring to produce a permeable base course mixture.

[0042] Use a paver to evenly spread the mixed permeable concrete onto the subgrade. The spreading thickness needs to be controlled according to the design requirements, and generally should not exceed 15cm.

[0043] Then, weigh out P.O52.5 cement, crushed stone with a particle size of 3mm, fly ash, and reinforcing agent according to a mass ratio of 100:700:100:5; mix thoroughly using a mixer to obtain a mixture; add the mixture to water, stir evenly, add the reinforcing agent, and continue stirring to make a permeable surface layer mixture;

[0044] A permeable surface layer of a predetermined thickness is laid on the surface of the permeable base course. During the laying process, a water collection trough and a permeable blind ditch are installed. The water collection trough and the permeable blind ditch extend along the width of the road surface into the drainage channel at the roadside. The water collection trough is located inside the permeable blind ditch, and the upper opening of the permeable blind ditch is larger than the bottom opening. The water collection trough is tubular, and its surface is evenly distributed with seepage holes.

[0045] The laid permeable concrete is vibrated with a vibrator to remove internal air bubbles and increase density; then, a road roller is used for compaction to ensure a tight and stable pavement structure. During compaction, it is important to control the compaction speed and number of passes to avoid over-compaction, which can reduce permeability.

[0046] Applying the first coat of topcoat: First, evenly spray the first coat of anti-slip topcoat onto the already laid permeable pavement. The main function of this coat is to enhance the pavement's waterproofness and wear resistance, laying the foundation for subsequent anti-slip layer construction.

[0047] Anti-slip texture design: After waiting a few minutes for the first coat of paint to dry slightly, use a pre-set anti-slip texture shaping machine to create an anti-slip surface. This will allow the pre-set anti-slip texture to be evenly distributed on the road surface, forming an anti-slip texture and achieving the anti-slip function of the road surface.

[0048] Apply a second coat of topcoat: After the anti-slip texture has set, wait approximately 30 minutes before applying a second coat of topcoat to enhance the anti-slip effect and protect the road surface from daily wear and tear.

[0049] Maintenance: After construction, the permeable pavement needs to be cured for at least 7 days. During the curing period, the pavement should be kept moist and protected from direct sunlight and wind to prevent cracking and reduced strength.

[0050] The steps in the following embodiments are similar to those in Embodiment 1, except that the mass ratio of the permeable base layer to the permeable surface layer is different.

[0051] Example 2:

[0052] The mass ratio of the permeable base course mix is ​​as follows: Weigh out P.O52.5 cement, fly ash, 5mm crushed stone, manufactured sand, water-reducing agent, defoamer, and 12mm long polyoxymethylene fiber according to a mass ratio of 250:50:400:300:5:0.2:8.

[0053] The proportions of the permeable surface layer mixture are as follows: weigh out P.W52.5 cement, crushed stone with a particle size of 3mm, fly ash, and reinforcing agent according to a mass ratio of 200:800:120:10.

[0054] Example 3

[0055] The mass ratio of the permeable base course mix is ​​as follows: Weigh out P.O52.5 cement, fly ash, 8mm crushed stone, manufactured sand, water-reducing agent, defoamer, and 12mm long polyoxymethylene fiber according to the mass ratio of 220:40:350:280:4:0.2:6.

[0056] The proportions of the permeable surface layer mixture are as follows: weigh out P.W52.5 cement, crushed stone with a particle size of 3mm, fly ash, and reinforcing agent according to a mass ratio of 180:750:110:8.

[0057] In the above embodiments, the permeability coefficient can achieve a high permeability of ≥1×10⁻³mm / s. The anti-slip texture design plays a crucial role in drainage and water storage. Water on the road surface can flow quickly along the undulations of the wavy pattern. The grooves of the anti-slip pattern act like miniature drainage channels, rapidly guiding rainwater to the road surface drains or allowing it to infiltrate into the ground. Furthermore, the structure of the anti-slip texture increases the surface area of ​​the road surface, increasing the contact area and extending the contact time between water and the road surface, which is beneficial for water infiltration. Simultaneously, the wavy pattern can also store some rainwater to a certain extent, which can then slowly evaporate, playing a role in regulating local humidity and temperature. At the same time, the water collection trough and permeable blind drain ensure that rainwater infiltrating during rainy days is promptly discharged into the roadside outlet pipes.

[0058] Although the present invention has been disclosed above with reference to preferred embodiments, these are not intended to limit the invention. Any person skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be defined by the scope of the claims of this application.

Claims

1. A method for preparing an enhanced anti-skid permeable pavement, characterized in that: include: Step 1: Prepare the permeable base course mixture; Mix 200-250 parts of cement, 20-50 parts of fly ash, 300-400 parts of coarse aggregate with a particle size of 5mm-10mm, 250-350 parts of manufactured sand, 1-5 parts of water-reducing agent, 0.1-0.2 parts of defoamer, and 3-8 parts of synthetic fiber evenly to obtain a permeable base course mixture. Step 2: Laying the permeable base layer; After cleaning and reinforcing the subgrade in the construction area, spread the permeable base layer mixture evenly on the surface of the subgrade, and ensure that the surface of the permeable base layer is flat. Step 3: Prepare the permeable surface layer mixture; mix 100-200 parts of cement, 700-800 parts of fine aggregate with a particle size of 3mm-5mm, 100-120 parts of fly ash, and 5-10 parts of reinforcing agent; wherein the reinforcing agent is a special powdered admixture for permeable concrete; mix and stir evenly to form the permeable surface layer mixture; Step 4: Lay a permeable surface layer and install a water collection trough and a permeable blind ditch inside the permeable surface layer; the water collection trough and the permeable blind ditch extend along the width of the road surface to the drainage channel on the side of the road; the water collection trough is located inside the permeable blind ditch, and the upper opening of the permeable blind ditch is larger than the bottom. Step 5: Spray the first coat of paint onto the laid permeable surface; wait a few minutes for the preset texture to be evenly distributed on the road surface to achieve the anti-slip function. Step Six: Apply the second coat of topcoat: After the preset texture has set, apply another coat of topcoat 30-50 minutes later.

2. The method for preparing an enhanced anti-skid permeable pavement according to claim 1, characterized in that: The anti-slip permeable pavement consists of a topcoat protective layer, a permeable surface layer, and a permeable base layer from top to bottom.

3. The method for preparing an enhanced anti-skid permeable pavement according to claim 1, characterized in that: In step one, the cement used for preparing the permeable base course mixture is P.O52.5; the fineness modulus of the manufactured sand is 2.6 to 3.2; the synthetic fiber is 10 mm to 14 mm long polyoxymethylene fiber; the coarse aggregate is crushed basalt or quartzite; and the mixing time in this step is 2 to 5 minutes.

4. The method for preparing an enhanced anti-skid permeable pavement according to claim 1, characterized in that: During steps two and four, the laid permeable concrete is vibrated and compacted.

5. The method for preparing an enhanced anti-skid permeable pavement according to claim 1, characterized in that: In step three, the cement used in preparing the permeable surface layer mixture is P.O52.5 or P.W52.5; the fine aggregate is crushed basalt or quartzite; and the mixing time is 5-8 minutes.

6. The method for preparing an enhanced anti-skid permeable pavement according to claim 1, characterized in that: In step five, the preset texture is wavy or / and sharp-angled; the texture depth is 2-3mm.

7. The method for preparing an enhanced anti-skid permeable pavement according to claim 6, characterized in that: The wavy or / and angular shapes are inlaid with permeable particles.

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