Pervious concrete procedure summary
Pervious concrete procedure summary
Pervious concrete, also known as porous concrete, can also be used as drainage concrete. It was first used by European and American countries to solve the road defects of existing urban roads, and an ecological paving material that allows rainwater to flow into the ground to effectively supplement groundwater is used. Pervious concrete not only effectively eliminates the hazards of oil compounds and other environmental pollution on the ground, but also makes an important contribution to our ecological environment.
The first construction process is agitation: the consistency of the cement slurry in the permeable floor mix is ​​relatively large. In order to ensure that the slurry can be uniformly wrapped in orthopedics and the material is evenly mixed, it is advisable to dry the mixture before adding water. It is better to use a forced mixer to stir the permeable floor mix and the mixing time is 3 minutes. about.
The second construction process is pouring: Before pouring, the subgrade must be wetted with water. Otherwise, the permeable floor paving material will quickly lose moisture and weaken the bond strength between the aggregates.
The third construction process is vibrating the base layer: it is not suitable for strong vibration or compaction during the pouring process. Flat-bed vibrators are generally used to gently oscillate the permeable concrete mixture, but care must be taken not to use high-frequency vibrators. Otherwise, he will make the concrete too dense to reduce the porosity and affect the 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, which will cause the material to lose its water permeability.
The fourth construction process is pervious surface construction: After the surface material is permeable, it is basically leveled, and then it is repeatedly compacted and leveled with a special paver for water-permeable flooring. It is best to combine the dedicated paving machine for the permeable floor. Polishing machine, individual not dense, filled with water-permeable materials, artificial iron trowel leveling, dense.
The fifth construction process is maintenance: Pervious concrete is dry and hard concrete, the water ash is relatively small, and due to the existence of a large number of holes, easy to lose water and dry quickly, so the maintenance is very important. Especially for early conservation, care should be taken to avoid significant evaporation of water in the permeable floor.
In addition, the pervious concrete is usually taken out of the mold for a shorter time than ordinary concrete, so that its sides and edges are exposed to the air, and the plastic film or color strip cloth is used to timely cover the road surface and sides to ensure that the humidity and the cement are fully hydrated. Permeable floor should be sprinkled and cured 1 day after pouring. When pouring, it is not suitable to use pressure water column to straighten the concrete surface. This will take some cement slurry and cause some weaker parts, but it can be directly from the top under normal conditions. Water down. The watering time of the permeable floor should be no less than 7 days.
Liaoning Plinder is a professional manufacturer of flooring materials, has more than ten years of experience in production and construction, and introduces advanced technology from Germany. The material can guarantee that there will be no fading and peeling in 15 years. A detailed construction video and professional technical guidance will answer your doubts during construction. Colored stone-like concrete goes to Plinde, Liaoning. Contact phone manager Zhang
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