Quality standards for waterstops
A. water swelling rubber surface should be clean and smooth, no scratches, bubbles and other impurities, the edge is neat.
B. Tensile strength of B. (Mpa) = 3.5
C. elongation (%) = 450
C. hardness (shore A) (degree) 42 + 7
F. hydrostatic expansion% = 250
Type of expansive water features water
1, swelling, "water seal";
2, the expansion speed is slow, the expansion rate is less than or equal to the maximum flooding 186h expansion rate of 50%;
3, the construction is convenient, the price is low
4, non-toxic non polluting
5, in a long time under the effect of water immersion precipitation;
6, and other hydrophilic waterstop compared to the largest are its hydrophilic swelling after long-term repeated expansion without losing.