Brief introduction of rubber seals of type 1 and 651:
The 651 type sealing strip is a common type of sealing strip, belonging to medium buried waterstop, the center hole of each of the 3 sides of the protruding arris, the specific type is shown in Figure 651, type rubber sealing strip is the most widely used products in the waterstop, commonly used in buried waterstop type, and 652 type 653.
Installation of two and 651 type water stop belt:
In construction, the rubber sealing strip of all or part of pouring buried in concrete in concrete pouring process, if there are many sharp stones and sharp head reinforced concrete, the tear strength of rubber and low tensile 3-5 times, so once punctured or torn, without external force will be. To expand, so in the waterstop positioning and concrete pouring process, should pay attention to positioning method and pouring pressure, so as to avoid the water stop was punctured, so in the waterstop positioning and concrete pouring process, should pay attention to positioning method and pouring pressure, so as not to be punctured, affect the waterproof effect of waterstop, specific matters needing attention the following:
A, rubber sealing tape can not be exposed for a long time in the open air, to prevent rain, do not contact with polluting chemicals. The product should be stored to keep the best places for -10 +30 C C, relative humidity in 40%80%.
B, in the transport and construction of products, to prevent mechanical, steel damage. In the storage and transportation of the finished product, it should be taken straight and flat, without heavy pressure.
C, in the process of construction, product installation must be fixed, to avoid displacement when pouring concrete, to ensure the correct position of water stop in concrete.
D, we usually fixed strip methods are: the use of additional reinforcement fixation; special fixture fixed; the wire and the fixed template, such as perforation, can only choose the installation area on the strip edge, not to damage other parts.
E, the user order should be based on the engineering structure design drawings, calculate the length of products, have special structure drawings and specifications, try to connect into a whole band in the factory will stop, if necessary in the field of connection, can use electric heating plate vulcanization bonding or cold bonding (rubber waterstop) or welding (plastic waterstop). Methods, such as the user is connected with the difficulties, our company can send technical personnel on-site guidance.
Three. Classification of water stop belt:
The water stop belt is made of elastic material and mixed with a variety of auxiliary additives, and is made by mixing and vulcanizing.
根据产品选用材质的不同可分为天然橡胶止水带 氯丁橡胶止水带 丁腈橡胶止水带 三元乙丙橡胶止水带 塑料（PVC）止水带 止水带接头。
According to the choice of material, the product can be divided into natural rubber water stop belt, chloroprene rubber water stop belt, nitrile rubber waterproof belt, three ethylene propylene rubber water stop belt plastic (PVC) water stop belt and water stop joint.
根据结构形式的不同又可分为：CB型橡胶止水带 CP型橡胶止水带 EB型橡胶止水带 EP型橡胶止水带。
According to the structure of the different forms can be divided into: CB rubber sealing tape, CP rubber water stop belt, EB rubber water stop belt, EP type rubber water stop belt.
According to the different installation methods, it can be divided into the embedded water stop belt, the external sticking type water stop belt and the detachable water seal
From the choice of materials, it can be divided into embedded 651 type rubber water stop belt, embedded PVC water stop belt, middle buried water stop joint and embedded water expansion water stop belt, etc..
The structure can be divided into two types: CB type water stop belt and CP type water stop belt.
Design and selection criteria: in the process of engineering design and construction selection, the width and thickness of CB type water stop belt should be determined according to the following conditions
1, the water pressure is less than 4m, the horizontal and vertical deformation is not more than 10mm, the width of the water stop should not be less than 200mm, the thickness should not be less than 5mm;
2, the water pressure is 4-8M, the horizontal and vertical deformation amount is not more than 30mm, the width of CB type water stop belt should not be less than 300mm, the thickness should not be less than 6mm;
3, the water pressure is greater than 8m, the horizontal and vertical deformation exceeds 30mm, the width of CB type water stop should not be less than 350mm, the thickness should not be less than 8mm;
4, the water pressure is not greater than 8m, the horizontal deformation is not more than 20mm, when there is no vertical deformation, the width of CB type water stop should not be less than 200mm, the thickness should not be less than 5mm. In addition, when the section size of the structure is greater than 500mm, the width of CB type water stop belt should not be less than 300mm, and when the CB type water stop strip is bent, the turning radius of the 300mm type water stop band shall not be less than 20 mm.