Application:
Rubber water-proof belt is generallt used in large concrete construction such as dam, reservoir and basement etc. Rubber water-proof belt is poured in deformation joint and construction joint of these project to avoid leakage.
Physical and mechanical property of rubber should accord with requirement listed below:
Item | Description | Nature rubber | Synthetic rubber | ||
1 | Hardness A | 60±5 | 60±5 | ||
2 | Tensile strength Mpa ≥ | 18 | 16 | ||
3 | Tensile yield % ≥ | 450 | 400 | ||
4 | Permanent compression set | 70℃x24h%≤ | 35 | 35 | |
23℃x168h%≤ | 20 | 20 | |||
5 | Tear strength N/m≥ | 35 | 35 | ||
6 | Brittleness temperature ℃≤ | -45 | -40 | ||
7 | Hot air aging | 70℃x72h | Hardness variation | 8 | |
Variation of tensile strength (lower) %≤ | 10 | ||||
Variation of tensile yield(lower) %≤ | 20 | ||||
70℃x96h | Hardness variation | 8 | |||
Variation of tensile strength (lower) %≤ | 10 | ||||
Variation of tensile yield(lower) %≤ | 20 | ||||
8 | Ozone aging 50pp 20% 48h | Grade 2 | 0 | ||
