Permeable floor construction steps:
Stirring: The consistency of the cement slurry in the permeable floor mixture is large and the quantity is small. In order to ensure that the cement slurry can be evenly wrapped in the orthopedics, a forced agitator should be used, and the stirring time is more than 5 minutes.
Pouring: The roadbed must be wetted with water before pouring. Otherwise, the rapid loss of moisture in the permeable floor will weaken the bond strength between the aggregates. Since the permeable floor mixture is relatively hard and dry, the well permeable floor and the good permeable floor material are laid on the roadbed and laid flat.
Vibrate: It should not be strongly vibrated or compacted during the pouring process. Generally, the plated vibrator is used to soften the flattened water-permeable concrete mixture, but it must be noted that the high-frequency vibrator cannot be used, otherwise it will make the concrete too dense to reduce the porosity and affect the water permeability. At the same time, the high-frequency vibrator will also separate the cement slurry from the surface of the coarse aggregate, and flow into the bottom to form an impervious layer, so that the material loses water permeability.
Rolling: After vibrating, solid steel pipe or light roller compactor should be used to compact and flatten the permeable concrete mix. Considering the consistency of the mixture and the surrounding temperature, it may take multiple rollings, but it should be noted that The rollers must be cleaned before rolling to prevent sticking of the aggregate.
Maintenance: Because of the large number of holes in the permeable floor, it is easy to lose water and dry quickly, so curing is very important. Especially in early maintenance, care should be taken to avoid large evaporation of water in the floor. Usually, the permeable concrete is demolished for a shorter time than ordinary concrete, so that the sides and edges of the permeable concrete are exposed to the air, and the plastic film or color strip cloth is used to cover the road surface and the side surface in time to ensure the humidity and the cement are fully hydrated. The permeable floor should be sprinkled and watered one day after pouring. It is not advisable to use a pressurized water column to directly rush the concrete surface when it is drenched. This will take away some cement slurry and cause some weak parts, but it can be directly from the normal situation. Water down. The watering and curing time of the permeable floor should be no less than 7 days.
Performance and advantages of permeable floor:
a. Absorb the noise generated when the vehicle is driving, creating a quiet and comfortable living and traffic environment;
b. Prevent rainy road area water and night road surface reflection, improve the traffic comfort and safety of vehicles and pedestrians;
c. The void ratio of 15%-25% increases the permeable and ventilated area of ​​the city, strengthens the heat exchange between the water inside the concrete and the surface and air, effectively regulates the urban climate, reduces the surface temperature, and helps alleviate the urban “heat island phenomenonâ€. ";
d, permeable rate of 270 liters / square meter / minute, can increase the rainwater infiltrated into the surface, alleviate some urban ecological environment problems such as the sharp drop of groundwater level.
e. The permeable concrete floor is strong in overallity and has a long service life, which is similar to or exceeds the service life of ordinary concrete. At the same time, it also makes up for the lack of integrity, unevenness, looseness and short service period of the permeable brick.
f. The permeable concrete floor has a series of classic color matching schemes, which can meet the designer's creativity and the special requirements of the owners, and realize the decorative ideas of different environments, different styles and individual requirements, which is unmatched by other ground materials. The permeable concrete floor is ideal for use in the grounds of municipalities, gardens, parks, sidewalks, stadiums, parking lots, residential areas, commercial plazas and cultural facilities.
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