What is the construction process of permeable flooring

Permeable flooring has the following performance characteristics: First, high permeability permeable flooring has 15% -25% of the pore space, can make the water permeability rate of 31-52 liters / m / h, much higher than the most effective rainfall in the most excellent drainage configuration of the discharge rate. Second, high bearing capacity identified by the national testing authority, the bearing capacity of the permeable floor can fully meet the C20-C25 concrete bearing standards, higher than the general bearing capacity of permeable bricks. Third, good decorative effect of permeable flooring has a color optimization ratio program, with the designer's unique ideas, to achieve different environments and personalities required by the decorative style. This is the general permeable brick is difficult to realize. Fourth, easy maintenance people worry about the pore clogging problem is not necessary, the unique permeable paving system so that it only needs to be washed by high pressure water can be easily solved. Fifth, freeze-thaw resistance permeable pavement than the general concrete pavement has a stronger resistance to freeze-thaw ability, will not be affected by freeze-thaw surface fracture, because of its structure itself has a large pore space. Sixth, durability permeable flooring of durable wear-resistant performance is better than asphalt, close to the ordinary flooring, to avoid the short service life of general permeable tiles, such as the shortcomings of the uneconomical. Seven, high heat dissipation of the density of the material itself is low (15-25% of the void) reduces the ability of heat storage, unique pore structure makes the lower underground temperature into the ground to reduce the temperature of the entire paved ground, these features make the permeable paving system in the absorption of heat and heat storage function is close to the ground covered by natural vegetation. It is widely used in municipal trails, garden paths, city squares, high-grade residential areas, parking lots, business office buildings, outdoor sports venues (badminton venues, basketball courts, etc.). Its scope of application for municipal trails, garden paths, city squares, high-grade residential areas, parking lots, commercial office buildings, outdoor sports venues (badminton courts, basketball courts, etc.). Construction process: construction steps: mixing: permeable flooring mixture of cement slurry consistency is large, and the number is small, in order to ensure that the cement slurry can be uniformly wrapped in the aggregate, it is appropriate to use a forced mixer, mixing time for more than 5 minutes. Pouring: Before pouring, the roadbed must be wet with water. Otherwise the rapid water loss of permeable flooring will weaken the bonding strength between the aggregates. As the permeable flooring mix is dry and hard, the mixed permeable flooring and good permeable flooring materials can be paved on the roadbed and paved. Vibrating: It is not suitable to strongly vibrate or tamp in the pouring process. Generally use flat vibrator light vibration after paving permeable concrete mixture, but must pay attention to not use high-frequency vibrator, otherwise he will make the concrete too dense surface to reduce porosity, and affect the effect of water permeability. At the same time, high frequency vibrators will also make the cement paste from the surface of the coarse aggregate segregation, into the bottom of the formation of an impermeable layer, so that the material loses water permeability. Rolling: After vibration, solid steel pipe or lightweight roller should be further used to compact and flatten the permeable concrete mix. Considering the consistency of the mix and the surrounding temperature and other conditions, it may need to be rolled several times, but it should be noted that the roller must be cleaned up before rolling to prevent bonding of the aggregate. Maintenance: Permeable floor due to the presence of a large number of holes, easy to lose water, dry very quickly, so maintenance is very important. Especially the early maintenance, we should pay attention to avoid a lot of water evaporation in the floor. Usually the demoulding time of pervious concrete is shorter than that of ordinary concrete, so its sides and edges will be exposed to the air, and plastic film or colorful strips of cloth should be used to cover the road surface and sides in time to ensure the humidity and full hydration of cement. Pervious flooring should be sprinkled and maintained 1 day after pouring, and it is not suitable to use pressure water column to rush straight to the surface of concrete when drenching, so that it will take away some cement slurry and cause some weaker parts, but it can be poured directly from the top to the bottom under normal condition. The watering maintenance time of permeable flooring should be not less than 7 days.