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FAQ

Is the raft cushion waterproofing full of the cushion?
Base cushion waterproofing is not contact with the soil (Ying water) to prevent water into the cushion, but in the cushion and the base of the bottom of the contact, in fact, is the basis of the bottom of the waterproof. The general basis of the foundation, the bar base is not necessary to do, like a raft in the basement, it is necessary to prevent the water from dipping into the basement (so the basement design may have to do anti-floating calculations).
Do you need a cushion for roof waterproofing?
Where the process (such as waterproof material construction, floor construction, equipment installation, etc.) on the grass-roots level have certain requirements, must be grass-roots leveling treatment, in the project, commonly used leveling method is to use a certain strength of cement mortar or Fine stone concrete leveling.
What is the difference between leveling and cushion?
Cushion is generally used in the ground floor of the building, leveling layer is generally used in the floor or roof. According to the above analysis, I believe that we use the quota, where the floor, roof construction, it should be used to find the level of the fixed sub-head, because there is no so-called concept of the cushion, leveling layer thickness is not what Specific provisions can also be used at the same time different layers of leveling, but must be carried out in accordance with the design requirements, so as not to exceed the load;
Can the cushion on the prefabricated board floor be dug?
Surface layer without steel, do not bear the load, you can dig out But sometimes the prefabricated floor above the surface layer with steel, to bear the load, this can not be removed! To know how thick the cushion, in the local dig about In general, to do leveling layer, can not be directly laid tiles
Large area ground concrete cushion seam Why is the separation of joints generally concrete
Large area of ??concrete after concrete construction, the concrete volume will be slightly inflated, the ground for a long time deposition, will be sinking, all large area of ??concrete construction, the general set of separation joints.
Maintenance time of the cushion on the roof of the building
According to the "concrete structure construction quality acceptance criteria" provides: Concrete should be poured within 12h after the completion of the concrete to be covered, and moisturizing conservation;
When the cushion is used, the thickness of the protective layer is not less than ()
Basement roof: non-load protection layer generally use C20 fine stone concrete or reinforced concrete, the thickness of 50 ~ 80mm. The road, driving the protective layer is determined by design.
Can the floor tiles be removed from the cement mats on the prefabricated board floor?
You can dig, but be careful not to use a strong earthquake with the machinery to remove, otherwise it will damage the original structure.