The expansion of water sealing strip with the national standard GB18173.3-2002 standard testing and production are as follows: PN-220 project performance requirements PN-150 PN-300 volume expansion rate (%) = 150 = 220 = 300 (80 C high temperature flow of #215; 5H) without flowing without flowing without flowing test at low temperature (20 DEG C - #215; 2H) no no embrittlement no embrittlement embrittlement
Construction and installation of water stop belt
The waterstop is in the concrete pouring process of all or part of pouring buried in concrete, there are many sharp stones and sharp head reinforced concrete, the tear strength of rubber and plastic tensile and low 3-5 times, once the waterstop punctured or torn, without a lot of external force, so the gap will be expanded. Waterstop positioning and concrete pouring process, should pay attention to positioning method and pouring pressure, so as to avoid the water stop is punctured, influence the sealing effect, the specific considerations are as follows:
First, the waterproof belt can not be exposed for a long time in the open air, to prevent rain, do not contact with polluting chemicals.
Two, in the transportation and construction, to prevent mechanical, steel damage water stop.
Three, in the construction process, the water stop belt must be reliably fixed, to avoid displacement when pouring concrete, to ensure the correct position of the water stop belt in concrete.
Method four, fixed strip: the use of additional reinforcement fixed and special fixture, fixed wire and fixed template (Figure), such as perforation, can only choose the installation area on the strip edge, not to damage other parts.
Five, the user order should be based on the engineering 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, such as site connection, can use electric heating plate vulcanization bonding or cold bonding (rubber waterstop) or welding (plastic waterstop) method, such as user connection difficulties, our company can send technical personnel on-site guidance.