This is used in water and sewage reservoirs, pools and concrete
water treatment plants as water sealant in concrete structure at the
point of bolt passage. These products have been tested in Iran by Sano
Engineering Laboratories that conform to DIN-1048 for water sealing up
to 5.5mm and suitability for use in sewage plants. This unique middle
bolt comprises of various parts which make a complete assembly: 1-Two
parts of PVC high pressure pipe with 25mm. outer diameter and
1.9-2.00mm. Thickness, having a rough surface. 2- Two pieces of cones
with 40mm. height made for a 16-18mm. diameter bolt to pass through. 3-
Two pieces pipe surface sealant which due to its geometric shape
prevents penetration of water through the pipe surface, the diameter of
its two sealing sheets are 7 cm. 4- One diaphragm water stop pulley with
8cm. diameter. 5- Three pieces of pipe interior sealant plugs, two with
edges, and one with no edge. ASSEMBLY: First , the two parts of rough
PVC pipes are connected through the diaphragm water stop pulley. The two
double water stop pulleys are then placed on both ends of the pipes.
The two cones are now installed on the double water stop pulleys. All
the above mentioned parts are pre assembled in the factory and delivered
to the client as a complete sealing middle bolt assembly. Instruction
to use: The sealing middle bolt is placed between two wall formworks and
the metal bolt with screw ends are passed through it, the formworks are
fastened by means of nuts, and finally the concrete pouring operation
begins.
At this stage the cones play a critical role. They prevent discharge
of laitance out of the formwork, and fix the double water stop pulleys
in a depth of 4 cm in the concrete wall. When the concrete is set, the
formworks are dismantled and by means of the same metal bolt, the cones
are removed from the sealing middle bolt buried in the concrete by
moving them to the left and right, and up and down. The sealing middle
bolt is then sprinkled with water causing slipperiness, and the pipe
interior sealant is also wetted. By means of 25 cm long punch having the
same diameter as the pipe and a 5 kg hammer various strokes are struck
until this piece is fixed in the middle of the concrete wall. Please
note that all the above operation is performed from the inside of the
water and sewage reservoirs. Two pieces of the edgy pipe interior
sealant are moved with the same punch and hammer into the middle bolt
pipe, one from the inside of the reservoir and the other from outside.
Finally the hollow created by 40 mm. cone is filled with grout, and a
perfect seal is created in the desired point.