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waterstop: rubber

Specifications

rubber construction swellable waterstops
 
1. General Introduction
 
      A waterstop is an element of a concrete structure, intended to prevent the passages of fluids (such as water) when embedded in and running continuously through concrete joints.
 
     Waterstops are frequently manufactured from extruded plastics such as flexible polyvinyl chloride PVC, polyethylene (PE) orthermoplastic vulcanizate rubber (TPV); formed metal such as stainless steel, copper, or carbon steel; or extruded thermosets such as natural rubber,styrene-butadiene rubber, or neoprene rubber.

2. Characteristics
 
 
     The waterstop belt can tight the airproofing, prevent making water, water penetration, shock absorption and cushion, for the characteristic of high flexibility and compression deformation.
 
 
     There have to be some construction slot, sedimentation slot, transmutation slot for some reason of can not keeping affuse, or the transmutation of geology, or the thermal expansion and thermal contraction of the concrete for the reason of temperature, so it must to fix the waterstop belt to prevent leakage.

3. Application
 
    The underground projects of the retaining dam, reservoir, metro, culvert, tunnel lamp. In those projects, it can be prevent from that the groundwater (or out of bounds water) spill over into the buildings structure and also can prevent the buildings water leakage to the outside world.

. Technology index
 
 
number
item
index
B
S
J
1
Rigidity, HA
60±5
60±5
60±5
2
Tensile strength ,MPa ≥
15
12
10
3
Snap and elongation,%≥
380
380
300
4
transmutation
70×24h,% ≤
35
35
35
23×168h,% ≤
20
20
20
5
Tear strength21,KN/m ≥
30
25
25
6
Brittleness temperature, ≤
-45
-40
-40
7
Air aging31
70×168h
Rigidity, HA ≤
8
8
--
Tensile strength,MPa ≥
12
10
Snap and elongation,% ≥
300
300
100×168h
Rigidity, HA ≤
--
--
8
Tensile strength,MPa ≥
9
Snap and elongation,% ≥
250
8
Ozone ageing 50pphm: 20%, 48h
2grade
2 grade
0 grade
9
Rubber and metal bonding
In vivo sections flexibility
remark
1 rubber and metal bonded items apply only to the edge of waterstop which include steel.
2 demand and supply can discuss about the question if there is other special needs, such as mold assessment test, but the anti-mildew properties should be equal or higher than two grade.