Please advise on the practice of permeable concrete pavement.

1. Mixing: The consistency of the cement slurry in the permeable floor mixture is larger, and the quantity is smaller, in order to ensure that the cement slurry can be evenly wrapped on the aggregate, it is advisable to use a compulsory mixer, and the mixing time is more than 5 minutes.

2. Pouring: Before pouring, the roadbed must be moistened with water. Otherwise, the rapid loss of moisture in the permeable floor will weaken the bond strength between the aggregates. Because the permeable floor mixture is relatively dry and hard, the mixed permeable floor and good permeable floor material can be paved on the roadbed.

3. Vibrating: It is not advisable to vibrate or tamp strongly during the pouring process. Use a plate vibrator to gently vibrate the paved permeable concrete mixture, but care must be taken not to use a high-frequency vibrator, otherwise it will make the concrete too dense surface reduce porosity and affect the permeability effect.

At the same time, the high-frequency vibrator will also make the cement slurry segregated from the surface of the coarse aggregate and flow into the bottom to form an impermeable layer, so that the material loses its permeability.

4. Roller pressing: After vibrating, solid steel pipes or light rollers should be further used to compact and flatten the permeable concrete mixture, considering the consistency of the mixture and the surrounding temperature and other conditions, it may be necessary to roll many times, but it should be noted that the rollers must be cleaned before rolling to prevent the aggregate from sticking.

5. Maintenance: The permeable floor should be sprinkled with water 1 day after pouring, and it is not advisable to use the pressure water column to rush directly to the concrete surface when spraying, which will take away some cement slurry and cause some weaker parts, but it can be poured directly from top to bottom under normal conditions. The watering and curing time of permeable flooring should not be less than 7 days.

The quantitative stones, cement, reinforcing agents, and water are mixed and stirred evenly, and then pulled to the construction site by the bucket truck.

The surface layer needs to be smoothed with a cement trowel, and after the construction is completed, it needs to be covered with agricultural film for health, and sprinkling maintenance is carried out two days later, and an isolation zone should be set up during the maintenance period to avoid pedestrians passing. Curing for five to seven days, spraying the top layer sealant after the surface layer is dry.

Composition of permeable concrete materials: special binder for permeable concrete, cement, gravel, water.

Mix ratio of four materials in the construction process: (by mass) Water: cement: cement: cement: gravel = 113:310:100:1520

Permeable concrete is a kind of ecological and environmentally friendly concrete, which can supplement groundwater, alleviate urban waterlogging, absorb sound and reduce noise, improve urban thermal environment, and has good environmental and social benefits. The in-depth study of permeable concrete pavement is conducive to the application and development of this green infrastructure.

1. [Mixing] The standard construction practice of mixing permeable concrete layer is to put quantitative stones, cement, reinforcing agent and water into the stirring and stir evenly, in order to facilitate the cement slurry to be evenly wrapped on the aggregate, it is best to use a compulsory mixer. According to the cohesiveness, homogeneity and strength of the permeable cement concrete mixture, the best mixing time is determined by test mixing, and the mixing time is more than 5 minutes. To color the concrete road, you need to add the toner to mix, first do the permeable bottom layer, the bottom layer does not need to add toner, and the permeable concrete of the surface layer can be mixed with latex toner.

2. [Pouring] When the concrete mixing is completed and ready to be paved, it is necessary to keep the roadbed moist with water, which helps to increase the bond strength between the aggregates. To check whether it is flat, unevenness will crack the permeable layer. There is no problem, just pave the mixed concrete on the roadbed.

3. [Vibrating] After paving, use a low-frequency plate vibrator to vibrate the permeable concrete layer, and cannot use a high-frequency vibrator, otherwise the permeable concrete will be squeezed too dense and affect the permeable effect, and the cement slurry will be separated from the aggregate surface and affect the effect of the permeable road.

4. [Rolling] When using light rollers or solid steel pipes for compaction and flattening, considering the weather temperature and the consistency of mixing, it can be rolled many times, pay attention to keeping the rollers clean to prevent sticking aggregates.

5. [Curing] Permeable concrete due to the existence of pores, rapid evaporation of water, easy to dry, so it is necessary to maintain in time, use plastic film to completely cover the road surface, start sprinkling water after a day of curing, pay attention not to use water guns to directly impact the concrete surface. The maintenance time is not less than seven days, and pedestrians are prohibited.

6. [Finished product] Finally, a layer of permeable concrete covering agent (protective agent) is sprayed, which can enhance the durability of permeable concrete, ensure the wear resistance, frost resistance, acid and alkali resistance of the surface, and also make the concrete pavement more colorful and increase the aesthetics.

Haha I just made permeable concrete, Nanjing Jiuherun's material last month, and they sent someone to come over for on-site technical guidance. I learned the technique, it's really simple, and next time I take on a project, I can just buy the materials without inviting them.

To get back to the point, the permeable concrete practice is very simple, generally divided into two layers, permeable base layer and surface layer, the surface layer is generally done 4-6cm, with color, the base layer does not have color, Jiu Herun last time that technology, it seems to be surnamed Li, said that it is best not to pave at one time, it will be unrealistic, after it is done, it must be maintained, if you don't ask them directly, just search Jiu Herun, you can come out at once.

Permeable concrete (permeable concrete) construction technology].

The quantitative stones, cement, reinforcing agents, water into the stirring after stirring evenly, pulled by the bucket truck to the construction site, the roadbed should be kept moist before paving, the cushion needs to be vibrated and smoothed, the surface layer needs to be smoothed with a cement trowel, after the construction needs to be covered with agricultural film for health, two days after the sprinkling of water maintenance, maintenance should be set up during the isolation belt, to avoid pedestrians through. Curing for five to seven days, spraying the top layer sealant after the surface layer is dry.

Preparation of materials before the construction of permeable concrete].

Stones: The project is low and procured nearby, with clean and uniform particle size of a single grade with stones, and basalt rice sand is recommended.

Cement: Portland cement with a higher grade is purchased nearby at the project site.

Other materials provided by Jiajing Ecology:

Permeable concrete reinforcing agent]: model (SR-02), brand (Jiajing ecology), packaging (10kg package), scope of application (color permeable concrete, permeable bricks, exposed aggregate permeable concrete and other permeable pavement).

Toner color pavement pigment]: packaging (25kg bag), alias (pavement pigment), scope of application (color permeable concrete, color permeable asphalt, color permeable floor and other pavement coloring).

Surface layer protector]: packaging (20kg drum), alias (covering agent, sealing agent), scope of application (bright color, acid resistance, alkali resistance, wear resistance, ultraviolet resistance).

1. Preparation of raw materials:

Stone: mud content, hard, durable, dense gravel;

Cement: ordinary Portland cement, the strength grade is not lower than grade.

Admixture: [Jiajing Ecology] SR permeable concrete reinforcing agent.

Water: clean, drinkable water;

toner: iron oxide series pigments;

Covering agent: [Jiajing Ecology] special protective agent for outdoor pavement;

The above materials can be prepared according to the permeable concrete mix ratio.

2. Equipment preparation:

Mixers, plate vibrators, grinders, transport trucks, scrapers, etc.;

3. Construction team formation:

Prepare a suitable team according to the project situation, generally a team of 8-12 people;

4. Construction: mixing--paving--curing-sawing, caulking--color spraying.

You can contact Jiangxi Lilai Company, they will construct permeable concrete pavement, Lilai Company pavement decoration has two modes: one is to buy their materials, he will teach you how to construct; Another is that they can contract labor and materials. Specifically, you can contact Lilai company, and a search for Jiangxi Lilai on the Internet will come out, and they have other garden and water conservancy engineering materials.

1. The subgrade is compacted.

According to the design requirements, determine the elevation and pavement slope, excavate the foundation soil to an appropriate depth, clean up the debris in the foundation soil and tamp it to 95% solidity in layers. In the case of soft soil foundations, saline-alkali soils, silty soils, muck soils, and clayey soils with very poor permeability, it is necessary to consider replacing the soil.

2. Permeable concrete mixing.

The consistency of the cement slurry in the permeable concrete mixture is larger, and the quantity is smaller, in order to make the cement slurry can be evenly wrapped on the aggregate, it is advisable to use a compulsory mixer, the mixing time is 4-6min, and the mixing ratio must be accurately mastered, the feeding sequence and the water added must be strictly controlled.

3. Paving preparation.

Before paving, the elevation should be determined first, and the existing curb stone that has curb stone on both sides and the elevation is level with it can be used as the slide rail of paving roller, and at this time it needs to be protected with plastic film at first, and the road surface width greater than 6 meters should also be pasted on one side of the expansion strip.

4. Rolling. After the guide rail is laid, first manually pave the fresh permeable concrete material, make its height about higher than the set height 20 30, and then the "backflush extrusion permeable concrete paver" is erected on the track, start the hydraulic power station, adjust the paver rotation speed and direction, pull the paving roller two to three times at a certain speed, and pay attention to the feeding material at any time during the rolling process.

5. Closing the edges. The permeable concrete pavement paved by the "backflush extrusion permeable concrete paver" has ensured the consistency of the surface aggregate, the necessary compactness and the good adhesion between the aggregates, but there will be a certain amount of surplus wet material at the joint, which needs to be cleaned at any time and rolled with manual pressure rollers, and smoothed with a trowel if necessary.

6. Maintenance. Permeable concrete due to the existence of a large number of pores, easy to lose water, drying quickly, so the maintenance is very important, especially early curing, pay attention to avoid a large amount of evaporation of water in the concrete, usually permeable concrete demoulding time is shorter than ordinary concrete, so that its sides and edges will be exposed to the air, the application of plastic film in time to cover the road surface, to ensure humidity and cement full hydration.

The construction practices of permeable concrete pavement are as follows:

At first, use a mixer to mix the grout until it is homogeneous. Carry out pouring pavement, which should be wet with water before starting. After paving, it is vibrated with a plate vibrator, and compacted and flattened by steel pipe or roller. Finally, water and cure for 7 days, and then spray with a protective agent.

Permeable concrete is a kind of porous lightweight concrete made from aggregates, cement, and water, which does not contain fine aggregates. The surface of the coarse aggregate is coated with a thin layer of cement slurry to form a honeycomb structure with uniform distribution of holes, so it has the characteristics of air permeability, water permeability and light weight. As an environmentally friendly type of concrete, more and more attention is being paid to the research and development of permeable concrete.

Background technology

With the development of the economy and the acceleration of urban construction, the surface of modern cities is gradually covered by buildings and concrete pavement. Convenient transportation facilities and smooth paved roads have brought great convenience to people's travel, but these impervious roads have also brought many negative impacts on the city's ecological environment.

Due to the lack of water permeability and air permeability of the concrete pavement, rainwater cannot penetrate into the ground, making it difficult for surface plants to grow normally due to severe water shortage. It is difficult for the airtight pavement to exchange heat and moisture with the air, and it lacks the ability to regulate the temperature and humidity of the urban surface, resulting in the so-called heat island phenomenon. In addition, impervious road surfaces are prone to water accumulation, reducing the comfort and safety of roads.

Permeable concrete pavement can increase the rainwater seeping into the surface, and at the same time can alleviate the problem of the sharp drop in the city's groundwater level, so many areas will use permeable concrete pavement to improve the city's environmental problems, so what is the practice of permeable concrete pavement? Let's take a look!

First, what is the practice of permeable concrete pavement.

1. Stir. Because the cement slurry of permeable concrete pavement has a relatively large consistency and a small quantity, people will use a compulsory mixer in order to ensure that the cement slurry can be evenly wrapped, and the mixing time is generally more than 5 minutes.

2. Pouring. Before pouring, the pavement must be moistened with water, otherwise the permeable floor will quickly lose moisture, thereby weakening the bond strength between aggregates. Because the permeable floor mixture is relatively dry and hard, it is enough to pave the mixed permeable floor and permeable floor material directly on the roadbed.

3. Vibrate. During the pouring process, it should not be vibrated and tamped too strongly. The permeable concrete mixture can be lightly vibrated with a plate vibrator, but the premise is that a high-frequency vibrator cannot be used, otherwise the concrete will be too compact, thereby reducing the porosity and affecting the permeability effect.

4. Rolling. After vibrating is the rolling, the solid steel pipe or light roller should be used to compact and flatten the permeable concrete mixture, it should be noted that the roll must be cleaned before rolling to prevent the aggregate from being bonded.

5. Maintenance. Because there are a large number of holes in the permeable concrete pavement, it is easy to lose water, and it dries very quickly, so maintenance is very important, especially in the early stage, especially to avoid a large amount of evaporation of water in the ground. Permeable concrete pavement should be sprinkled 1 day after pouring, and the time of watering and curing should not be less than 7 days.

Summary: The above is what is the practice of permeable concrete pavement shared for everyone, I believe that you have a corresponding understanding after reading the above sharing, if you need to know more about it, please continue to pay attention to Qeeka Home**, will answer for you one by one.