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Permeable brick research-development trends-market demand

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更新时间:2018年05月21日05:23:23 打印此页 关闭 Hits: 1554 Updated: May 21, 2018 05:23:23 Print this page Close
At present, in the construction of cities, materials such as natural hard stones, bright bricks, cement, and asphalt are often used to lay urban roads, squares, and sidewalks. It seems that an impermeable armor is put on the ground to make the city in The weather is boring, hot, and dusty. It is wet, rainy, and even partly flooded in rainy days. The earth cannot be penetrated, the soil cannot breathe, the groundwater level cannot be compensated, the urban heat island effect cannot be alleviated, and suspended matter in the air is difficult to settle and attach to the ground and many other damages. Together with the flow of water through the drainage pipeline, not only exacerbated the burden of urban drainage, but also affected the normal growth of urban vegetation and surface plants, and exacerbated the burden of landscaping irrigation for municipal administration.
In the existing skills, there is a composite permeable brick . The permeable brick includes a permeable surface layer and a permeable bottom layer. The permeable surface layer and the permeable bottom layer are tightly integrated into one body. The permeable surface layer and the permeable bottom layer separately include the bonding of aggregate and coated aggregate. Agent. The hydrophilic resin binder is epoxy resin. This kind of composite permeable brick is made by using adhesive to bind sand particles. The adhesive is a chemical product and expensive. No matter what color the permeable brick is green, the main reason is the formation of the adhesive's own color, coupled with the high cost and high price of the permeable brick , the market acceptance rate is extremely small.
Another type of ceramic permeable brick is sintered after the destruction and treatment of waste ceramics. This Although the permeable bricks have dealt with the problem of the utilization of some waste porcelain, because they must be sintered at a high temperature of more than 1000 degrees, the manufacturing process is messy and the cost is high.

High-strength, high-permeability, sun and rain ecological permeable bricks that can absorb heat and noise, do not accumulate water, and do not slip, will become the primary information for paving, and will gradually replace the general hardened floor tiles and granite, glazed tiles, asphalt Data such as pavement will be the future development trend of paving data.
Now in the construction of urban infrastructure, the main materials selected for the paving and construction of the city's squares, commercial streets, sidewalks, gardens and other landscaped areas are granite, marble, concrete-shaped bricks, and asphalt surfaces. Will cause some damage to the urban environment. People only pay attention to their artistic appreciation, but ignore the environmental maintainability. These hardened ground disadvantages are:
1. Impervious to rainwater, so that the rainwater's make up for underground water is completely blocked.
2. Sedimentary rainwater will cause traffic jams, bring inconvenience to pedestrians, and aggravate the pollution of exhaust emissions from motor vehicles. Pollution can also be exacerbated if rainwater is discharged into rivers.
3. The rainwater remaining on the hardened ground will be quickly transpired, and the accumulated pollutants will aggravate the dust pollution and make the ground surface dry soon.
4. The snow and water left in winter will freeze, affecting people's travel and organization.
5. It is extremely unfavorable to maintain and balance the urban ecological space.
However, the use of sunlight and rain ecological permeable bricks will greatly overcome the disadvantages brought by the hardened ground. The characteristics of this permeable brick are: first, it has good water permeability and air permeability. It can make rainwater enter the ground quickly, make up for surface water, add soil moisture, and improve the living conditions of above-ground plants and microorganisms. Secondly, it can absorb moisture and heat, and adjust the temperature and humidity of some surface space, which has a greater effect on mitigating the urban heat island effect. It can prevent the accumulation of water after the rain, reduce the pressure of urban drainage and flood prevention, avoid sewage pollution, and facilitate the travel of citizens' vehicles. It can also avoid road reflections, absorb noise that occurs when the vehicle is running, and improve the comfort and safety of the vehicle.
The sunlight rain ecological permeable bricks use non-polluting raw materials such as cement and sandstone, and do not contain chemical preparations of organic gelling materials. The function of the bricks must be adjusted by adjusting the coordination of the raw materials and the equipment process parameters. To ensure the environmental protection of bricks and eliminate the ecological impact of non-environmental factors. The strength of the sunlight rain ecological permeable brick can reach 30MPa, and its strength loss is less than 8% after 25 freeze-thaw cycles. Permeable bricks and permeable products will enter the mall as replacements, which is now reflected in the relevant national policies: the Ministry of Construction has issued inspections on the establishment of an "ecological garden city" (Jiancheng [2004] No. 98) Rules and regulations "The share of water-permeable pavement on hard pavement is not less than 50% ... Thermal conductivity effect ... Surface flow value ...".
In accordance with the "State Council's Resolution on Implementing the Scientific Development Concept and Strengthening Environmental Maintenance," Tell [2006] No. 61 "to start discussions on water-permeable and noise-reducing pavement planning, construction skills, use of new road sound-absorbing materials, water-permeable materials, and construction of noise reduction and water permeability Roads, improve the city's "thermal conductivity effect," and control urban noise pollution. "
First discussion content and skill innovation
Primary seminar content:
Sunlight rain ecological permeable brick . It is based on the general cement concrete by adding water permeable agent and other additional materials to make its concrete products (including two structural methods of permeable bricks and permeable pavements) to complete the large-scale production, so as to reach the country's relevant permeable pavements and permeable bricks. Ground strength, water permeability, and service life requirements are widely used in highways, airfield runways, roadways, sidewalks, squares, and garden buildings. They can also alleviate or deal with road icing, urban heat island effects, and cost. Advanced issues. Secondly, super strong anti-rust paint is also our research content.
Skill innovation:
General road bricks are impermeable and impervious, only ensuring the strength and abrasion resistance, while the sunlight rain ecological permeable bricks can ensure the strength and abrasion resistance together to make them water-retentive and permeable, and reach the upper and lower permeability. The primary manufacturing scheme is: use commercially available computerized automatic block forming machine equipment to make permeable bricks after two fabrics and one molding process; the method is to make the fabric the base material, the base material is the basic color, and the second The secondary cloth is a surface layer, and the surface layer is a color layer. The color of the color layer includes red, yellow, blue, green, white, black, and cyan gray patterns. The thickness of the surface layer is controlled from 2mm to 8mm; the thickness of the bottom layer is controlled from 20mm- -100mm, common thickness is 32mm-86mm; first mix the dry material guessed in the bottom layer with a mixer and then pass the computer fully automatic block forming machine twice to distribute the material and the machine to form it once. After 24 hours at normal pressure, sprinkle water for maintenance for more than 28 days. After passing the inspection, it can reach:
① Compressive strength
Cc35 standard average value ≧ 35 single * small value ≧ 30MPa
② Abrasion resistance
Grinding pit length ≦ 31mm
③Water retention ≧ 0.7g / cm2
④ Water permeability coefficient (15 ℃) ≧ 1.3 × 10-2cm / s
⑤Frost resistance
After 25 freeze-thaw cycles, the appearance quality matches the quality error, and the compressive strength loss rate is 56.2%
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