Q:Large area ground concrete cushion seam Why is the separation of joints generally concrete

First, the rigid waterproof layer in a large area of ??construction, by the external force, temperature, humidity changes, structural layer deformation and other factors prone to cracking, leading to leakage, the design should consider the deformation of the waterproof layer to take the necessary Structural or structural measures to avoid and mitigate the cracking of the waterproofing layer to achieve the desired waterproofing effect.

Q:Do you need a cushion on the ground floor?

As well as the time to build a wooden building with concrete pier, from the ground or contact the ground to do a good job preserving.

Q:Why calculate the amount of time to count a lot of cushion ah

It can be seen, in the preparation of the project budget, the cushion is also a very important sub-head, the amount of its calculation is often measured by m3, the current commonly used materials are concrete, gravel, stone, Stone slag), slag, slag concrete, lime and so on.

Q: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;

Q:Do you need a cushion for roof waterproofing?

Roofing layer of leveling layer is usually used 20mm thick 1: 2.5 cement mortar. The leveling layer may be made directly on the structural concrete surface, or it may be made on the insulation layer and is provided for the construction of the waterproof material.

Q:Basement cushion waterproof

Second, when the design of the highest groundwater level above the bottom of the basement floor, you must do waterproofing. As the waterproof waterproof effect is good, so the application of more. Internal waterproofing is generally used for repair works.

Q:Roof waterproof mattress should play the number of centimeters appropriate

? 2. repair the cracks well. After the cracks to be repaired are dry, start waterproofing.

Q: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

Q:Is it possible to make a waterproof layer

2, waterproof layer: In order to prevent the rain into the roof, groundwater into the wall, basement and underground structures, indoor water into the floor and walls and other materials layer.

Q:When the cushion is used, the thickness of the protective layer is not less than ()

Master roof: the general use of 40 thick C20 reinforced fine stone concrete protection.