-
BKN-90 is made from plastic PVC, heat resistance, aging resistance. Product is
designed to waterproof for expansion joints, settlement joint, construction joint,
cold joint,….
Used for expansion joint, settlement joint, construction joint,…the following items:
- Wall basement.
- Wall.
- Disposal tank, underground tank, flameproof and unburned tank,…
- Swimming pool.
- Expansion joint of basement floor.
- Hole of staircase….
- Easy to use, high effective.
- High waterproof when concrete gets setting.
- Bonding well with concrete.
- Chemical and alkaline resistance.
- There are many types to suit each location of structure
|
Purpose
|
Type
|
Width of bar (mm) ± 3% |
Web thickness (mm) ± 10% |
Length (m)
|
|
Construction joint
|
SV150 SV200 SV250
SV320
|
150 200 250 320 |
3 ÷ 5 3 ÷ 5 3 ÷ 5
3 ÷ 5
|
20 20 20 20 |
|
Expansion joint
|
O150 O200 O250 |
150 200 250 |
3 ÷ 5 3 ÷ 5
3 ÷ 5
|
20 20 20 |
|
Chemical base:
|
Polyvinyl Clorua |
|
Appearance / Color:
|
Flexible strip/ Yellow
|
|
Density:
|
1.40 ± 0.02 kg/liter @ 250C.
|
|
Shore A hardeness:
|
> 65 (ASTM 2240 -02)
|
|
Tensile strength:
|
≥ 11.8 MPa (Meet the requirements of TCVN 9407:2014 and JIS K6773:2007)
|
|
Extension:
|
≥ 250% (Meet the requirements of TCVN 9407:2014 and JIS K6773:2007) |
|
Application temperature:
|
-55oC÷55oC
|
|
Chemical resistance:
|
Acid, alkaline resistance, waste water resistance, seawater resistance.
|
|
Connection temperature:
|
≥ 200oC |
|
Storage Condition :
|
Store in a dry, cool place, freeze-free area
|
Construction joint:
-
Use BKN-90 V in the middle structure.
Formwork positioning: the positioning method allows a half BKN-90 V
projecting hose and the rest will be entombed in concrete. BKN-90 V will be
positioned by formworks.
Constructive reinforcement positioning: Use wire to link with steel bar of
structure to position BKN-90 V not move during the concrete placement.
BKN-90 V does not use to separate the mass concrete.
Expansion joint:
-
Use BKN-90 O in the middle structure.
BKN-90 O can be positioned by formwork of 2 parts separated. However, when
using BKN-90 O for expansion joint, and construction joint moving, the letter
Concrete
placement:
Period 1:
-
Before pouring concrete must check the installation and location of joints,…
BKN-90 will promote the features when both sides are deep on concrete, the
concrete placement must comply with the technical requirement to avoid concrete
being void at the joint location.
Concrete aggregate with a grain size suitable aggregate, the slump is not too high
or too low.
During concrete placement must evenly distribute the pressure of 2 sides of BKN90 to avoid BKN-90 being folded back.
Period 2:
-
Remove formwork carefully around BKN-90, and recheck concrete at the joint
position is void or not, if yes, should be repaired. Clean the dropping concrete on
BKN-90 of period 1. Then pouring concrete for the next.
Solder joint:
Use electric knife welding to weld in the construction site
- Butt weld: Heated together both ends of the weld by electric knife welding until
PVC layer flowing, take knife out and squeeze two joints together, hold until the
joint welding is cool and stick together. Recheck if the joint welding does not
meet, must reweld.
- Lap welding: Heated together both ends of the weld about 5cm when PVC
flowing, take knife out and squeeze two joints together until the lap welding is
cool and stick together.
Cleaning:
-
Proper disposal in accordance with local
Safety:
-
Non-toxic. But be aware to avoid inhaling smoke and steam in the process of
welding PVC. Therefore be clear position welding.